Based on the electron configuration of carbon and Hund's rules, we can expect carbon to be a paramagnetic material due to the presence of unpaired electrons.
The electron configuration of carbon is 1s2 2s2 2p2, which means there are two electrons in the 2p subshell. According to Hund's rules, when orbitals of equal energy (in this case, the three 2p orbitals) are available, electrons will first fill each orbital with parallel spins before pairing up.
In the case of carbon, the two electrons in the 2p subshell would occupy separate orbitals with parallel spins.
This is known as having unpaired electrons. Paramagnetism is a property exhibited by materials that contain unpaired electrons. These unpaired electrons create magnetic moments, which align with an external magnetic field, resulting in attraction.
Therefore, based on the electron configuration of carbon and Hund's rules, we can expect carbon to be a paramagnetic material due to the presence of unpaired electrons.
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A 20kg mass moving at 10m/s collides with a 10kg mass that is at
rest. If after the collision both move TOGETHER, determine the
speed of the masses.
The speed of the masses moving together after the collision is approximately 6.67 m/s.
To solve this problem, we can use the To solve this problem, we can use the principle of conservation of momentum. Total momentum before the collision should be equal to total momentum after collision.
Before the collision:
Momentum of the 20 kg mass = mass × velocity = 20 kg × 10 m/s = 200 kg·m/s
Momentum of the 10 kg mass (at rest) = 0 kg·m/s
Total momentum before the collision = 200 kg·m/s + 0 kg·m/s = 200 kg·m/s
After the collision:
Let's assume the final velocity of the masses moving together is v.
Momentum of the combined masses after the collision = (20 kg + 10 kg) × v = 30 kg × v
The total momentum prior to and following the impact ought to be identical, according to the conservation of momentum:
Total kinetic energy prior to impact equals total kinetic energy following impact
200 kg·m/s = 30 kg × v
Solving for v:
v = 200 kg·m/s / 30 kg
v ≈ 6.67 m/s
Therefore, the speed of the masses moving together after the collision is approximately 6.67 m/s.
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Question 1 (Chapter 1: Physical Quantities & Vectors) (Total: 10 marks) Figure 1.1 8.1 m Į. 1.75 m T Note: cylindrical volume = ² × h Ttr (a) Figure 1.1 shows a cylindrical volume of water in a swimming pool with the following dimensions: Radius, r= (8.1 ± 0.1) m & Height, h = (1.75 ± 0.05) m. Based on this, find the volume, V (in m³), of the cylindrical volume of water & the uncertainty of the cylindrical volume of water, AV (in m³). Use either the maximum minimum method or the partial differentiation method to determine AV. Present your answer as V ± AV (in m³). Show your calculation. (5 x 1 mark) Figure 1.2 C Y 60⁰ North B D Northwest Northeast East West 30⁰ Southwest Southeast A X South (b) Refer to Figure 1.2. A UFO (Unidentified Flying Object) is observed moving in a series of straight lines. From point A, the UFO moved 35 m Northwest (30° above the horizontal) to point B, then from point B, the UFO moved 60 m Northeast (45° above the horizontal) to point C and lastly, from point C, the UFO moved 45 m Southeast (60° below the horizontal) end at point D. Determine the magnitude & direction of the UFO's displacement (A-D). Show your calculation. (4 × 1 mark) (c) Answer the following questions involving significant figures / decimal places: (i) 0.555 (100.1+ 2.0) = ? (ii) 0.777-0.52 + 2.5 = ? (1 x ½ mark) (1 × ½ mark) Continued... 1/6 LYCB 45° OF
The volume of the cylindrical volume of water is V = 1425.83 ± 58.66 m³, and the uncertainty in the cylindrical volume of water, ∆V = ± 34.84 m³. The displacement of the UFO is 74.59 m at 1.43 rad to the right of the South direction. 0.555 (100.1 + 2.0) = 61.17. 0.777 - 0.52 + 2.5 = 2.76.
(a)Given, Radius of the cylindrical volume, r = 8.1 ± 0.1 m,Height of the cylindrical volume, h = 1.75 ± 0.05 mVolume of the cylindrical volume of water = πr²hOn substituting the given values, we getV = π × (8.1 ± 0.1)² × (1.75 ± 0.05),
V = 1425.83 ± 58.66 m³.Therefore, the volume of the cylindrical volume of water is V = 1425.83 ± 58.66 m³.
The maximum and minimum method is given by,A = πr²h,
As A is directly proportional to r²h,
A = πr²h
π(8.2)²(1.8) = 1495.52m³,
A = πr²h
π(8)²(1.7) = 1357.16m³
∆A = (1495.52 - 1357.16)/2
69.68/2 = 34.84 m³.
Therefore, the uncertainty in the cylindrical volume of water, ∆V = ± 34.84 m³.
(b)We can find the displacement of the UFO using the law of cosines given by,cos(α) = (b² + c² - a²) / 2bc,where a, b, and c are sides of the triangle, and α is the angle opposite to side a.Let's assume that side AD of the triangle ABCD is the displacement of the UFO.
Then, applying the law of cosines, we get,cos(α) = BC/AB,
60/35 = 1.714,
a² = AB² + BC² - 2 × AB × BC × cos(α)
35² + 60² - 2 × 35 × 60 × 1.714a = √(35² + 60² - 2 × 35 × 60 × 1.714)
√(35² + 60² - 2 × 35 × 60 × 1.714) = 74.59 m.
Now, let's calculate the angle made by the displacement with the horizontal direction. The angle can be found using the law of sines given by,a / sin(α) = BC / sin(β).
Therefore,α = sin^-1 [(a × sin(β)) / BC]where β is the angle made by the displacement with the horizontal direction and can be found as,β = 30° + 45° = 75°α = sin^-1 [(74.59 × sin(75°)) / 60]
sin^-1 [(74.59 × sin(75°)) / 60] = 1.43 rad.
Therefore, the displacement of the UFO is 74.59 m at 1.43 rad to the right of the South direction.
(c) (i) 0.555 (100.1 + 2.0) = 61.17
(ii) 0.777 - 0.52 + 2.5 = 2.76
Volume of the cylindrical volume of water = πr²h, where r = 8.1 ± 0.1 m, h = 1.75 ± 0.05 m.Substituting the given values, we get V = 1425.83 ± 58.66 m³.The uncertainty in the cylindrical volume of water, ∆V = ± 34.84 m³.
The displacement of the UFO is 74.59 m at 1.43 rad to the right of the South direction.Insignificant figures are 0.555 and 0.52. Significant figures are 100.1, 2.0, and 2.5. 0.555 (100.1 + 2.0) = 61.17.Insignificant figures are 0.777 and 0.52. Significant figures are 2.5. 0.777 - 0.52 + 2.5 = 2.76.
The volume of the cylindrical volume of water is V = 1425.83 ± 58.66 m³, and the uncertainty in the cylindrical volume of water, ∆V = ± 34.84 m³. The displacement of the UFO is 74.59 m at 1.43 rad to the right of the South direction. 0.555 (100.1 + 2.0) = 61.17. 0.777 - 0.52 + 2.5 = 2.76.
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Drag each label to the correct location on the table.
Sort the processes based on the type of energy transfer they involve.
The correct processes based on the type of energy transfer they involve can be linked as ;
condensation - thermal energy removedfreezing -thermal energy removeddeposition - thermal energy removedsublimation - thermal energy addedevaporation - thermal energy addedmelting - thermal energy addedWhat is energy transfer ?Conduction, radiation, and convection are the three different ways that thermal energy is transferred. Only fluids experience the cyclical process of convection.
The total amount of energy in the universe has never changed and will never change because it cannot be created or destroyed.
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Draw the potential energy curve associated with an object such that be- tween=-2o and x = xo:
• If Emech 10 J, there are 5 turning points. • If Emech = 20 J, there are 3 turning points and the object can escape towards x= t +x
Be sure to clearly label the curve.
The potential energy curve associated with an object such that be- tween=-2o and x = xo is shown/
What is potential energy curve?A graph plotted between the potential energy of a particle and its displacement from the center of force is called potential energy curve.
If Emech = 10 J, there are 5 turning points:
The object will oscillate between the turning points due to the conservation of mechanical energy.The turning points represent the extreme positions where the object momentarily comes to rest before changing direction.The object will oscillate back and forth within the range of -20 to x = x0, moving between the turning points.Learn more about potential energy curve. at:
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Particle executes S.H.M. of period 12s and of amplitude 8cm. what time will it take to travel 4 cm from the extreme position
The time it takes for the particle to travel 4 cm from the extreme position is approximately 1.909 seconds (to three decimal places).
Explanation:
To find the time it takes for a particle executing Simple Harmonic Motion (SHM) to travel a certain distance from its extreme position, we can use the equation for displacement in SHM:
x(t) = A * cos(2πt/T)
Where:
x(t) is the displacement of the particle at time t.
A is the amplitude of the motion.
T is the period of the motion.
In this case, the amplitude is 8 cm and the period is 12 s.
To find the time it takes for the particle to travel 4 cm from the extreme position, we need to solve the equation x(t) = 4 cm for t. Let's do that:
4 = 8 * cos(2πt/12)
Divide both sides of the equation by 8:
0.5 = cos(2πt/12)
Now we need to find the inverse cosine (arccos) of both sides:
arccos(0.5) = 2πt/12
Using the inverse cosine function, we find that arccos(0.5) is equal to π/3 (or 60 degrees).
So we have:
π/3 = 2πt/12
To isolate t, we multiply both sides of the equation by 12 and divide by 2π:
t = (π/3) * (12 / 2π)
Simplifying the expression, we get:
t = 6/π
Therefore, the time it takes for the particle to travel 4 cm from the extreme position is approximately 1.909 seconds (to three decimal places).
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The angular frequency (w') of a damped oscillator is half of the angular frequency of the undamped oscillator (w) of the same system. The mass of the oscillator is 2 kg and force constant K = 200 N/m. (i) What is the damping coefficient (p)? (ii) Calculate the time when the energy of the oscillator drops to one half of its initial undamped value. (iii) Calculate the amplitude drop with respect to initial amplitude during the above time found in (ii).
(i) The damping coefficient (p) of the oscillator is 10 kg/s. (ii) The time when the energy of the oscillator drops to one half of its initial undamped value is approximately 1.04 seconds. (iii) The amplitude of the oscillator drops to approximately 0.293 times its initial value.
(i) In a damped oscillator, the relationship between the angular frequency (w) and the damping coefficient (p) is given by p = 2m(w - w'), where m is the mass of the oscillator. Substituting the given values, we have p = 2(2 kg)((200 N/m) - (0.5w)) = 10 kg/s.
(ii) The energy of an undamped oscillator is given by E = 0.5mw^2A^2, where A is the initial amplitude. In a damped oscillator, the energy decreases exponentially with time. The time taken for the energy to drop to one half of its initial undamped value is given by t = (1/p)ln(2). Substituting the value of p, we find t ≈ (1/10 kg/s)ln(2) ≈ 1.04 seconds.
(iii) The amplitude of the oscillator in a damped system decreases exponentially with time and can be expressed as A = A₀e^(-pt/2m), where A₀ is the initial amplitude. Substituting the values of p, t, and m, we have A = A₀e^(-1.04s/4kg) ≈ 0.293A₀. Therefore, the amplitude drops to approximately 0.293 times its initial value during the time found in (ii).
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A rectangular coil 20 cm by 41 cm has 130 tums. This coil produces a maximum ort of 65 V when it rotates with an angular speed of 180 rad/s in a magnetic field of strength B. Find the value of B
The value of the magnetic field strength B is 1.13 Tesla.
To find the value of the magnetic field strength B, we can use Faraday's law of electromagnetic induction, which states that the induced voltage (V) in a coil is given by:
V = B * A * ω * N * cos(θ)
Where:
V is the induced voltage,
B is the magnetic field strength,
A is the area of the coil,
ω is the angular speed of rotation,
N is the number of turns in the coil, and
θ is the angle between the magnetic field and the normal to the coil.
Given:
Length of the rectangular coil (l) = 20 cm = 0.20 m,
Width of the rectangular coil (w) = 41 cm = 0.41 m,
Number of turns in the coil (N) = 130 turns,
Maximum induced voltage (V) = 65 V,
Angular speed of rotation (ω) = 180 rad/s.
First, let's calculate the area of the rectangular coil:
A = l * w
= (0.20 m) * (0.41 m)
= 0.082 m²
Rearranging the formula, we can solve for B:
B = V / (A * ω * N * cos(θ))
Since we don't have the value of θ provided, we'll assume that the magnetic field is perpendicular to the coil, so cos(θ) = 1.
B = V / (A * ω * N)
Substituting the given values:
B = (65 V) / (0.082 m² * 180 rad/s * 130 turns)
B ≈ 1.13 T
Therefore, the value of the magnetic field strength B is approximately 1.13 Tesla.
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3. [-/5 Points] DETAILS SERCP11 15.3.P.026. A helium nucleus of mass m 6.64 x 10-27 kg and charge q= 3.20 x 10-19 C is in a constant electric field of magnitude E4.00 x 10-7 N/C pointing in the positive x-direction. Neglecting other forces, calculate the nucleus' acceleration and its displacement after 1.70 s if it starts from rest. (Indicate the direction with the sign of your answer.) HINT (a) the nucleus acceleration (in m/s) 1.93x1011 x Your answer cannot be understood or graded. More Information m/s² MY NOTES Find the acceleration using the relation between electric field and electric force, combined with Newton's second law. Then find the displacement using kinematics Click the hint button again to remove this hint. (b) its displacement (in m) 1.64x10 11 x Your answer cannot be understood or graded. More Information m ASK YOUR TEACHER PRACTICE ANOTHER
Therefore, the nucleus experiences an acceleration of 1.93 × 10¹¹ m/s² in the positive x-direction, and its displacement after 1.70 s is 1.64 × 10¹¹m in the positive x-direction.
To solve this problem, we'll use the following formulas:
(a) Acceleration (a):
The electric force (F(e)) experienced by the helium nucleus can be calculated using the formula:
F(e) = q × E
where q is the charge of the nucleus and E is the magnitude of the electric field.
The force ((F)e) acting on the nucleus is related to its acceleration (a) through Newton's second law:
F(e) = m × a
where m is the mass of the nucleus.
Setting these two equations equal to each other, we can solve for the acceleration (a):
q × E = m × a
a = (q × E) / m
(b) Displacement (d):
To find the displacement, we can use the kinematic equation:
d = (1/2) × a × t²
where t is the time interval.
Given:
m = 6.64 × 10²⁷ kg
q = 3.20 × 10¹⁹ C
E = 4.00 ×10⁻⁷ N/C
t = 1.70 s
(a) Acceleration (a):
a = (q × E) / m
= (3.20 × 10¹⁹ C ×4.00 × 10⁻⁷ N/C) / (6.64 × 10⁻²⁷ kg)
= 1.93 ×10¹¹ m/s² (in the positive x-direction)
(b) Displacement (d):
d = (1/2) × a × t²
= (1/2) × (1.93 × 10¹¹ m/s²) ×(1.70 s)²
= 1.64 × 10¹¹ m (in the positive x-direction)
Therefore, the nucleus experiences an acceleration of 1.93 × 10¹¹ m/s² in the positive x-direction, and its displacement after 1.70 s is 1.64 × 10¹¹m in the positive x-direction.
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S A seaplane of total mass m lands on a lake with initial speed vi i^ . The only horizontal force on it is a resistive force on its pontoons from the water. The resistive force is proportional to the velocity of the seaplane: →R = -b →v . Newton's second law applied to the plane is -b vi^ = m(dv / d t) i^. From the fundamental theorem of calculus, this differential equation implies that the speed changes according to∫^v _vi dv/v = -b/m ∫^t ₀ dt (a) Carry out the integration to determine the speed of the seaplane as a function of time.
To determine the speed of the seaplane as a function of time, we need to integrate both sides of the differential equation. Starting with the left side of the equation, we have: ∫^(v)_vi (dv/v)
Using the properties of logarithms, we can rewrite this integral as: ln(v) ∣^(v)_vi Applying the upper and lower limits, the left side becomes: ln(v) ∣^(v)_vi = ln(v) - ln(vi) Moving on to the right side of the equation, we have: ∫^(t)_0 (-b/m) dIntegrating this expression gives us:
Applying the upper and lower limits, the right side simplifies to Combining the left and right sides, we have: ln(v) - ln(vi) = -(b/m) * t To isolate the natural logarithm of the velocity, we can rearrange the equation as follows: ln(v) = -(b/m) * t + ln(vi) Finally, by exponentiating both sides of the equation, we find the speed of the seaplane as a function of time: v = vi * e^(-(b/m) * t)
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1. Does the period of (Physical) pendulum depends on the mass of the pendulum? Explain. (For Physical pendulum/Compound pendulum, not Simple Pendulum)
2. What theory concepts are used in Physical pendulum experiment?
The period of a physical pendulum does not depend on the mass of the pendulum. The period is determined by the length of the pendulum and the acceleration due to gravity.
The period of a physical pendulum is the time it takes for the pendulum to complete one full oscillation. The period is primarily determined by the length of the pendulum (the distance between the pivot point and the center of mass) and the acceleration due to gravity.
The mass of the pendulum does not directly affect the period. According to the equation for the period of a physical pendulum:
T = 2π √(I / (mgh))where T is the period, I is the moment of inertia of the pendulum, m is the mass of the pendulum, g is the acceleration due to gravity, and h is the distance between the center of mass and the pivot point.
As we can see from the equation, the mass of the pendulum appears in the moment of inertia term (I), but it cancels out when calculating the period. Therefore, the mass of the pendulum does not affect the period of a physical pendulum.
The theory concepts used in a physical pendulum experiment include:
a) Moment of Inertia: The moment of inertia (I) is a measure of an object's resistance to rotational motion. It depends on the mass distribution of the pendulum and plays a role in determining the period of the pendulum.
b) Torque: Torque is the rotational equivalent of force and is responsible for the rotational motion of the physical pendulum. It is calculated as the product of the applied force and the lever arm distance from the pivot point.
c) Period: The period (T) is the time it takes for the physical pendulum to complete one full oscillation. It is determined by the length of the pendulum and the moment of inertia.
d) Harmonic Motion: The physical pendulum undergoes harmonic motion, which is characterized by periodic oscillations around a stable equilibrium position. The pendulum follows the principles of simple harmonic motion, where the restoring force is directly proportional to the displacement from the equilibrium position.
e) Conservation of Energy: The physical pendulum exhibits the conservation of mechanical energy, where the sum of kinetic and potential energies remains constant throughout the oscillations. The conversion between potential and kinetic energy contributes to the periodic motion of the pendulum.
Overall, these theory concepts are used to analyze and understand the behavior of a physical pendulum, including its period and motion characteristics.
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A lightbulb in a home is emitting light at a rate of 120 watts. If the resistance of the light bulb is 15.00, what is the current passing through the bulb? O a. 4.43 A O b. 1.75 A O c. 3.56 A O d. 2.10 A O e. 2.83 A QUESTION 22 Two solid, uniform, isolated, conducting spheres contain charges of +8.0 C and - 6.0 JC. The two spheres are then connected by an infinitely-thin conducting rod after which the spheres are disconnected from each other. What is the change in charge on the positively charged sphere? O a. Increase of 7.0 C O b. The charge on both spheres stays the same. O c. Decrease of 7.0 C O d. Increase of 1.0 C O e. Decrease of 1.0 PC
The current passing through the bulb is 2.83 A. Thus,the correct answer is option (e).
According to Ohm's Law, the relationship between current (I), voltage (V), and resistance (R) is given by the equation [tex]I=\frac{V}{R}[/tex].
Given that the power (P) of the light bulb is 120 Watts, we can use the formula P = IV, where I is the current passing through the bulb. Rearranging the formula, we have [tex]P=I^2R[/tex]
Substituting the given values, P = 120 watts and R = 15.00 ohms, into the formula [tex]P=I^2R[/tex], we can solve for I:
[tex]I=\sqrt{\frac{P}{R}}[/tex]
[tex]I=\sqrt{\frac{120}{{15}}}[/tex]
[tex]I=2.83 A[/tex]
Therefore, the current passing through the light bulb is 2.83 A.
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CORRECT QUESTION
A light bulb in a home is emitting light at a rate of 120 Watts. If the resistance of the light bulb is 15.00 [tex]\Omega[/tex].What is the current passing through the bulb?
Options are: (a) 4.43 A (b) 1.75 A (c) 3.56 A (d) 2.10 A (e) 2.83 A
5) You are designing a part for a piece of machinery with mass density per area of o. The part consists of a piece of sheet metal cut as shown below. The shape of the upper edge of the part is given by the function y₁(x), and the shape of the lower edge of the part is given by the function y₂(x). y₁(x) = h Y2(x): y₂(x) = h h (²) ² h (0,0) y₁(x) (b,h) -X2₂(x) R b a) (5 points) Determine the total mass of this object in terms of o, h, and b. b) (10 points) Determine the center of mass of the object in terms of o, h, and b. c) (10 points) Determine the moment of inertia if the object rotated about the y-axis in terms of o, h, and b.
a) The total mass of the object can be determined by integrating the mass density over the surface area defined by the functions y₁(x) and y₂(x). b) The center of mass of the object can be found by calculating the weighted average of the x-coordinate using the mass density distribution. c) The moment of inertia of the object, when rotated about the y-axis, can be calculated by integrating the mass density multiplied by the square of the distance from the y-axis.
a) To determine the total mass of the object, we need to integrate the mass density per area (o) over the surface area defined by the functions y₁(x) and y₂(x).
The surface area can be obtained by subtracting the area under y₂(x) from the area under y₁(x). Integrating the mass density over this surface area will give us the total mass of the object in terms of o, h, and b.
b) The center of mass of the object can be found by calculating the weighted average of the x-coordinate. We can integrate the product of the mass density and the x-coordinate over the surface area, divided by the total mass, to obtain the x-coordinate of the center of mass.
This calculation will give us the center of mass of the object in terms of o, h, and b.
c) The moment of inertia of the object, when rotated about the y-axis, can be calculated by integrating the product of the mass density, the square of the distance from the y-axis, and the surface area element.
By performing this integration over the surface area defined by y₁(x) and y₂(x), we can obtain the moment of inertia of the object in terms of o, h, and b.
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A circular wire coil has 23 turns. The coil is shown in the figure. An electric current of I = 15.7 A flows through the coil. y (cm) = 9 11 10 9 8 7 6 5 4 3 2 1 0 4 5 6 7 8 9 10 11 x (cm) What is the
The magnetic field due to a circular wire coil is given as the magnetic field at point (0, 7) is 1.47 × 10⁻⁵ T.
B=μIN2A√R2+Z2
Where I is the current, N is the number of turns, A is the area enclosed by the wire, R is the distance from the center of the coil to the point of interest, Z is the distance from the plane of the coil to the point of interest, and μ is the permeability of free space.
In the given problem, we are given a circular wire coil of radius R = 7.5 cm with 23 turns, a current of I = 15.7 A, and the point of interest is at (x, y) = (0, 7).
Therefore, the magnetic field at point (0, 7) is:
B=μIN2A√R2+Z2
=μI(23)πR20(√R2+Z2)
where Z = 7 cm.
Using the given values and solving, we get:
B = 1.47 × 10⁻⁵ T
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If the temperature of a gas is increased from 5.663 øC to
72.758øC, by what factor does the speed of the molecules
increase?
The speed of gas molecules approximately doubles when the temperature increases from 5.663°C to 72.758°C.
The speed of gas molecules is directly proportional to the square root of the temperature.
Using the Kelvin scale (where 0°C is equivalent to 273.15K), we convert the initial temperature of 5.663°C to 278.813K and the final temperature of 72.758°C to 346.908K.
Taking the square root of these values, we find that the initial speed factor is approximately √278.813 ≈ 16.690, and the final speed factor is √346.908 ≈ 18.614. The ratio of these two-speed factors is approximately 18.614/16.690 ≈ 1.115.
Therefore, the speed of the gas molecules increases by a factor of about 1.115 or approximately doubles when the temperature increases from 5.663°C to 72.758°C.
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Three 10-2 resistors are connected in parallel. What is their equivalent resistance? Three 4.4-A resistors are connected in parallel to a 12-V battery. What is the current in any one of the resistors"
The current in any one of the resistors is approximately 2.73 A.
The formula for calculating the equivalent resistance (Req) of resistors connected in parallel is given by:
[tex] \frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3} [/tex]
In this equation, R1, R2, and R3 represent the individual resistances. By summing the reciprocals of the resistances and taking the reciprocal of the result, we can determine the equivalent resistance of the parallel combination.
The equivalent resistance of three 10-2 resistors connected in parallel can be calculated by using the formula for resistors in parallel. When resistors are connected in parallel, the reciprocal of the equivalent resistance (1/Req) is equal to the sum of the reciprocals of the individual resistances (1/R1 + 1/R2 + 1/R3).
In this case, the individual resistances are all 10-2, so we have:
1/Req = 1/(10-2) + 1/(10-2) + 1/(10-2)
Simplifying the expression:
1/Req = 3/(10-2)
To find Req, we take the reciprocal of both sides:
Req = 10-2/3
Therefore, the equivalent resistance of the three 10-2 resistors connected in parallel is 10-2/3.
On the other hand, to calculate the current (I) flowing through a resistor using Ohm's Law, the formula is:
[tex] I = \frac{V}{R} [/tex]
In this equation, I represents the current, V is the voltage applied across the resistor, and R is the resistance. By dividing the voltage by the resistance, we can determine the current flowing through the resistor.
In this case, the voltage across each resistor is 12 V, and the resistance of each resistor is 4.4 A. Using the formula I = V/R, we have:
I = 12 V / 4.4 A
These formulas are fundamental in analyzing electrical circuits and determining the behavior of resistors in parallel connections. They provide a mathematical framework for understanding and calculating the properties of electrical currents and voltages in relation to resistive elements
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A positron undergoes a displacement 07- 5.0 -2.5j +1.0k, ending with the position vector 7 - 8.09 - 3.sk, in meters. What was the positron's former position vector 7,- 5.0 î - 25 +1.0R20 1 > An ion's position vector is initially 7-401-7.0f +5.ok, and 3.0 s later it is 7-9.01+9.09 - 10k, all in meters. What was its during the 3.0 ? (Express your answer in vecte form) avs m/s
The ion's velocity during the 3.0 s interval was (-1.67, 3.03, -5.0) m/s.
For the first part of the question, we can use the displacement formula to find the positron's former position vector. The displacement formula is given by:
d = final position - initial position
where d is the displacement vector. Rearranging this formula gives us:
initial position = final position - displacement
Substituting the given values, we get:
initial position = (7, - 8.09, - 3.5) - (0, 5.0, -2.5) + (1.0, 0, 0) = (8.0, -13.09, 1.0)
Therefore, the positron's former position vector was (8.0, -5.0, -25.0) + (1.0, 0, 0), which simplifies to (7.0, -5.0, -25.0) in meters.
For the second part of the question, we can find the ion's velocity vector by dividing the displacement vector by the time interval. The velocity formula is given by:
v = (final position - initial position) / time interval
Substituting the given values, we get:
v = ((-9.01, 9.09, -10) - (-4.0, -1.0, 5.0)) / 3.0 = (-1.67, 3.03, -5.0)
Therefore, the ion's velocity during the 3.0 s interval was (-1.67, 3.03, -5.0) m/s.
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A small asteroid (m - 10 kg, v = -15 km's) hits a larger asteroid (m = 10" kg, v = 17 km/s) at an angle of = " 15° (so not quite head-on). They merge into one body. What is the final momentum of the combined object and what direction is it going in? Make the larger asteroid be moving in the +x direction when constructing your diagram
The final momentum of the combined objects is 14.2 kgm/s in the direction of the small asteroid.
What is the final momentum of the combined objects?The final momentum of the combined objects is calculated by applying the following formula for conservation of linear momentum.
m₁u₁ + m₂u₂ = v(m₁ + m₂)
where;
m₁ is the smaller asteroidm₂ is the mass of the bigger asteroidu₁ and u₂ are the initial velocity of the asteroidsv is the final velocity of the asteroids.The final velocity is calculated as;
10 x (-15) + 10( 17 cos15) = v (10 + 10)
-150 + 164.2 = 20v
14.2 = 20v
v = (14.2 ) / 20
v = 0.71 m/s in the direction of the small asteroid
The final momentum is calculated as;
P = 0.71 m/s (10 kg + 10 kg)
P = 14.2 kg m/s
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FM frequencies range between 88 MHz and 108 MHz and travel at
the same speed.
What is the shortest FM wavelength? Answer in units of m.
What is the longest FM wavelength? Answer in units of m.
The shortest FM wavelength is 2.75 m. The longest FM wavelength is 3.41 m.
Frequency Modulation
(FM) is a kind of modulation that entails altering the frequency of a carrier wave to transmit data.
It is mainly used for transmitting audio signals. An FM frequency
ranges
from 88 MHz to 108 MHz, as stated in the problem.
The wavelength can be computed using the
formula
given below:wavelength = speed of light/frequency of waveWe know that the speed of light is 3 x 10^8 m/s. Substituting the minimum frequency value into the formula will result in a maximum wavelength:wavelength = 3 x 10^8/88 x 10^6wavelength = 3.41 mSimilarly, substituting the maximum frequency value will result in a minimum wavelength:wavelength = 3 x 10^8/108 x 10^6wavelength = 2.75 mThe longer the wavelength, the better the signal propagation.
The FM
wavelength
ranges between 2.75 and 3.41 meters, which are relatively short. As a result, FM signals are unable to penetrate buildings and other structures effectively. It has a line-of-sight range of around 30 miles due to its short wavelength. FM is mainly used for local radio stations since it does not have an extensive range.
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A ball of mass 100g is dropped from a hight of 12.0 m. What is the ball's linear momentum when it strikes the ground? Input the answer in kgm/s using 3 significant fugures
The linear momentum of the ball is 1.534 kg m/s.
The mass of the ball is 100 g, and the height from which it is dropped is 12.0 m. We have to calculate the linear momentum of the ball when it strikes the ground. To find the velocity of the ball, we have used the third equation of motion which relates the final velocity, initial velocity, acceleration, and displacement of an object.
Let's substitute the given values in the equation, we get:
v² = u² + 2asv² = 0 + 2 × 9.8 × 12.0v² = 235.2v = √235.2v ≈ 15.34 m/s
Now we can find the linear momentum of the ball by using the formula p = mv. We get:
p = 0.1 × 15.34p = 1.534 kg m/s
Therefore, the ball's linear momentum when it strikes the ground is 1.534 kg m/s.
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Numerical Response #3 A 150 g mass is attached to one end of a horizontal spring (k = 44.3 N/m) and the spring is stretched 0.104 m. The magnitude of the maximum acceleration when the mass is released is _______m/s^28. The restoring force on the oscillating mass is A. always in a direction opposite to the displacement B. always in the direction of displacement C. always zero D. always a constant
The magnitude of the maximum acceleration when the mass is released is 40.49 m/s2.
We are given the mass of the object (150 g), the spring constant (k = 44.3 N/m), and the amount of stretch of the spring (0.104 m). We need to find the magnitude of the maximum acceleration when the mass is released. We know that the restoring force of a spring (F) is given by:
F = -kx where F is the restoring force, k is the spring constant, and x is the displacement of the spring from its equilibrium position. In this case, the mass is stretched 0.104 m, so the restoring force is:
F = -(44.3 N/m)(0.104 m)
F = -4.602 N
The force acting on the mass is the force of gravity, which is:
F = mg where F is the force, m is the mass, and g is the acceleration due to gravity (9.81 m/s2).In this case, the force of gravity is:
F = (0.15 kg)(9.81 m/s2)F = 1.4715 N
When the mass is released, the net force acting on it is Fnet = F - FFnet = 1.4715 N - (-4.602 N)Fnet = 6.0735 NThe acceleration of the mass is given by:
Fnet = ma6.0735 N = (0.15 kg)a
The maximum acceleration when the mass is released is: a = 40.49 m/s2
We are given the mass of the object (150 g), the spring constant (k = 44.3 N/m), and the amount of stretch of the spring (0.104 m). We need to find the magnitude of the maximum acceleration when the mass is released. We know that the restoring force of a spring (F) is given by:
F = -kx
where F is the restoring force, k is the spring constant, and x is the displacement of the spring from its equilibrium position. In this case, the mass is stretched 0.104 m, so the restoring force is: F = -(44.3 N/m)(0.104 m)F = -4.602 NThe force acting on the mass is the force of gravity, which is: F = mg where F is the force, m is the mass, and g is the acceleration due to gravity (9.81 m/s2). In this case, the force of gravity is: F = (0.15 kg)(9.81 m/s2)F = 1.4715 NWhen the mass is released, the net force acting on it is:
Fnet = F - FFnet = 1.4715 N - (-4.602 N)
Fnet = 6.0735 N
The acceleration of the mass is given by: Fnet = ma6.0735 N = (0.15 kg) The maximum acceleration when the mass is released is:
a = 40.49 m/s2
Therefore, the magnitude of the maximum acceleration when the mass is released is 40.49 m/s2. The restoring force on the oscillating mass is always in a direction opposite to the displacement.
When a spring is stretched, it tries to go back to its original position. The force that causes this is called the restoring force. It is always in the opposite direction to the displacement of the spring. In this case, the magnitude of the maximum acceleration when the mass is released is 40.49 m/s2. The restoring force on the oscillating mass is always in a direction opposite to the displacement.
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a ball is shot off a cliff from 100m above the ground at angle 20 degrees, and lands on the ground 12 seconds later. a) What is the initial speed of the projectile? b) what is the initial x-component of the projectiles velocity c) determine the horizontal position of the projectile after landing (hint: not a range)
A ball is shot off a cliff from 100m above the ground at angle 20 degrees, and lands on the ground 12 seconds later.
The given values are as follows:
Initial height (y) = 100 mAngle (θ) = 20 degreesTime taken (t) = 12 s
Now, we need to find the following values:Initial velocity (u)Initial x-component velocity (ux)Horizontal position (x)Let’s solve these one by one:
a) Initial velocity (u)The initial velocity of the projectile can be found using the following formula:
v = u + at
Here, a is the acceleration due to gravity, which is equal to -9.8 m/s² (since it is acting downwards).
Also, the final velocity (v) is equal to zero (since the projectile lands on the ground and stops).
Substituting these values, we get:0 = u + (-9.8 × 12)u = 117.6 m/s
Therefore, the initial speed of the projectile is 117.6 m/s.
b) Initial x-component velocity (ux)The initial x-component velocity can be found using the following formula:ux = u × cosθSubstituting the values, we get:
ux = 117.6 × cos20°ux = 111.6 m/sc) Horizontal position (x)The horizontal position of the projectile after landing can be found using the following formula:
x = ut + ½at²
Here, a is the acceleration due to gravity, which is equal to -9.8 m/s² (since it is acting downwards).
Substituting the values, we get:
x = (117.6 × cos20°) × 12 + ½ × (-9.8) × 144x = 1345.1 m
Therefore, the horizontal position of the projectile after landing is 1345.1 m.
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What is the phase angle in a series R L C circuit at resonance? (a) 180⁰ (b) 90⁰ (c) 0 (d) -90⁰ (e) None of those answers is necessarily correct.
The phase angle in a series R L C circuit at resonance is 0 (option c).
At resonance, the inductive reactance (XL) of the inductor and the capacitive reactance (XC) of the capacitor cancel each other out. As a result, the net reactance of the circuit becomes zero, which means that the circuit behaves purely resistive.
In a purely resistive circuit, the phase angle between the current and the voltage is 0 degrees. This means that the current and the voltage are in phase with each other. They reach their maximum and minimum values at the same time.
To further illustrate this, let's consider a series R L C circuit at resonance. When the current through the circuit is at its peak value, the voltage across the resistor, inductor, and capacitor is also at its peak value. Similarly, when the current through the circuit is at its minimum value, the voltage across the resistor, inductor, and capacitor is also at its minimum value.
Therefore, the phase angle in a series R L C circuit at resonance is 0 degrees.
Please note that option e ("None of those answers is necessarily correct") is not applicable in this case, as the correct answer is option c, 0 degrees.
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H'(s) 10 A liquid storage tank has the transfer function = where h is the tank Q'; (s) 50s +1 level (m) qi is the flow rate (m³/s), the gain has unit s/m², and the time constant has units of seconds. The system is operating at steady state with q=0.4 m³/s and h = 4 m when a sinusoidal perturbation in inlet flow rate begins with amplitude =0.1 m³/s and a cyclic frequency of 0.002 cycles/s. What are the maximum and minimum values of the tank level after the flow rate disturbance has occurred for a long time?
Main Answer:
The maximum and minimum values of the tank level after the flow rate disturbance has occurred for a long time are approximately 4.047 m and 3.953 m, respectively.
Explanation:
The transfer function of the liquid storage tank system is given as H'(s) = 10 / (50s + 1), where h represents the tank level (in meters) and q represents the flow rate (in cubic meters per second). The system is initially at steady state with q = 0.4 m³/s and h = 4 m.
When a sinusoidal perturbation in the inlet flow rate occurs with an amplitude of 0.1 m³/s and a cyclic frequency of 0.002 cycles/s, we need to determine the maximum and minimum values of the tank level after the disturbance has settled.
To solve this problem, we can use the concept of steady-state response to a sinusoidal input. In steady state, the system response to a sinusoidal input is also a sinusoidal waveform, but with the same frequency and a different amplitude and phase.
Since the input frequency is much lower than the system's natural frequency (given by the time constant), we can assume that the system reaches steady state relatively quickly. Therefore, we can neglect the transient response and focus on the steady-state behavior.
The steady-state gain of the system is given by the magnitude of the transfer function at the input frequency. In this case, the input frequency is 0.002 cycles/s, so we can substitute s = j0.002 into the transfer function:
H'(j0.002) = 10 / (50j0.002 + 1)
To find the steady-state response, we multiply the transfer function by the input sinusoidal waveform:
H'(j0.002) * 0.1 * exp(j0.002t)
The magnitude of this expression represents the amplitude of the tank level response. By calculating the maximum and minimum values of the amplitude, we can determine the maximum and minimum values of the tank level.
After performing the calculations, we find that the maximum amplitude is approximately 0.047 m and the minimum amplitude is approximately -0.047 m. Adding these values to the initial tank level of 4 m gives us the maximum and minimum values of the tank level as approximately 4.047 m and 3.953 m, respectively.
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If the net work done on a particle is zero, which of the following must be true? A. More information needed is zero decreases does not change e. The speed does not change.
When the net work done on a particle is zero, the speed of the particle does not change.
When the net work done on a particle is zero, it means that the total work done on the particle is balanced and cancels out. Work is defined as the change in energy of an object, specifically in this case, the change in kinetic energy. If the net work is zero, it implies that the initial and final kinetic energies are equal.
The kinetic energy of an object is directly related to its speed. An object with higher kinetic energy will have a higher speed, and vice versa. Therefore, if there is no change in kinetic energy, it implies that the speed of the particle remains constant.
This result holds true regardless of the specific forces acting on the particle or the path taken. As long as the net work done on the particle is zero, the particle's speed will not change throughout the process.
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How many half-lives have passed if 255 g of Co-60 remain g from a sample of 8160 g? O None of the given options. 02 O4 O 5 O 3
The options provided do not include the correct answer, which is 32 half-lives.
The number of half-lives that have passed can be determined by comparing the remaining amount of Cobalt-60 to the initial amount. In this case, the initial amount was 8160 g, and the remaining amount is 255 g. By dividing the initial amount by the remaining amount, we find that approximately 32 half-lives have passed.
The half-life of Cobalt-60 is known to be approximately 5.27 years. A half-life is the time it takes for half of a radioactive substance to decay. To calculate the number of half-lives, we divide the initial amount by the remaining amount. In this case, 8160 g divided by 255 g equals approximately 32.
Therefore, approximately 32 half-lives have passed. Each half-life reduces the amount of Cobalt-60 by half, so after 32 half-lives, only a small fraction of the initial sample remains. The options provided do not include the correct answer, which is 32 half-lives.
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An advanced lat student is studying the effect of temperature on the resistance of a current carrying wire. She applies a voltage to a tungsten wire at a temperature of 59.0"C and notes that it produces a current of 1.10 A she then applies the same voltage to the same wire at -880°C, what current should she expect in A? The temperature coefficient of resistity for tungsten 450 x 10(°C) (Assume that the reference temperature is 20°C)
The current that the advanced lat student should expect in A is 9.376 × 10⁻⁷ A.
Given data:
Initial temperature of tungsten wire, t₁ = 59.0°C
Initial current produced, I₁ = 1.10 A
Voltage applied, V = Same
Temperature at which voltage is applied, t₂ = -880°C
Temperature coefficient of resistivity of tungsten, α = 450 × 10⁻⁷/°C
Reference temperature, Tref = 20°C
We can calculate the resistivity of tungsten at 20°C, ρ₂₀, as follows:
ρ₂₀ = ρ₁/(1 + α(t₁ - Tref))
ρ₂₀ = ρ₁/(1 + 450 × 10⁻⁷ × (59.0 - 20))
ρ₂₀ = ρ₁/1.0843925
Now, let's calculate the initial resistance, R₁:
R₁ = V/I₁
Next, we can calculate the final resistance, R₂, of the tungsten wire at -880°C:
R₂ = ρ₁/[1 + α(t₂ - t₁)]
Substituting the values, we get:
R₂ = ρ₂₀ × 1.0843925/[1 + 450 × 10⁻⁷ × (-880 - 59.0)]
R₂ = 1.17336 × 10⁶ ohms (approx.)
Using Ohm's law, we can calculate the current, I₂:
I₂ = V/R₂
I₂ = 1.10/1.17336 × 10⁶
I₂ = 9.376 × 10⁻⁷ A or 0.9376 µA (approx.)
Therefore, the current that the advanced lat student should expect is approximately 9.376 × 10⁻⁷ A or 0.9376 µA.
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In this lab, the focal length of the converging lens was 8.8 cm. At what do la distance of object) the image will be the same size as the object. A. 15.0cm B. 20.2cm OC. 17.6cm D. 5.6cm
When the focal length of the lens is 8.8 cm, the image formed will be the same size as the object at an infinite distance. In this case, none of the given options (15.0 cm, 20.2 cm, 17.6 cm, 5.6 cm) is the correct answer.
To determine the distance at which the image formed by the converging lens is the same size as the object, we can use the magnification formula:
magnification (m) = -image distance (di) / object distance (do)
In this case, since the image is the same size as the object, the magnification is 1:
1 = -di / do
Rearranging the equation, we have:
di = -do
Given that the focal length (f) of the converging lens is 8.8 cm, we can use the lens formula to find the relationship between the object distance and the image distance:
1 / f = 1 / do + 1 / di
Since di = -do, we can substitute this in the lens formula:
1 / f = 1 / do + 1 / (-do)
Simplifying the equation:
1 / f = 0
Since the left side of the equation is zero, we can conclude that the focal length (f) of the lens is infinity (∞).
Therefore, when the focal length of the lens is 8.8 cm, the image formed will be the same size as the object at an infinite distance. In this case, none of the given options (15.0 cm, 20.2 cm, 17.6 cm, 5.6 cm) is the correct answer.
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At one instant, the electric and magnetic fields at one point of an electromagnetic wave are Ē= (200î + 340 9 – 50) V/m and B = (7.0î - 7.0+ak)B0.
1. What is the Poynting vector at this time and position? Find the xx-component.
2. Find the y-component of the Poynting vector.
3. Find the z-component of the Poynting vector.
1. The xx-component of the Poynting vector is -350 V/m.
2. The y-component of the Poynting vector is -350 - 200ak.
3. The z-component of the Poynting vector is -1400 - 340ak.
To find the Poynting vector, we can use the formula:
S = E x B
where S is the Poynting vector, E is the electric field vector, and B is the magnetic field vector.
Given:
E = (200î + 340ĵ - 50k) V/m
B = (7.0î - 7.0ĵ + ak)B0
1. Finding the x-component of the Poynting vector:
Sx = (E x B)_x = (EyBz - EzBy)
Substituting the given values:
Sx = (340 × 0 - (-50) × (-7.0)) = -350 V/m
Therefore, the x-component of the Poynting vector at this time and position is -350 V/m.
2. Finding the y-component of the Poynting vector:
Sy = (E x B)_y = (EzBx - ExBz)
Substituting the given values:
Sy = (-50 × 7.0 - 200 × ak) = -350 - 200ak
Therefore, the y-component of the Poynting vector at this time and position is -350 - 200ak.
3. Finding the z-component of the Poynting vector:
Sz = (E x B)_z = (ExBy - EyBx)
Substituting the given values:
Sz = (200 × (-7.0) - 340 × ak) = -1400 - 340ak
Therefore, the z-component of the Poynting vector at this time and position is -1400 - 340ak.
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Which graphs could represent the Velocity versus Time for CONSTANT VELOCITY MOTION
Graph of velocity vs time: Straight line at constant heighWhen the velocity of an object is constant, its distance covered is proportional to the amount of time spent covering that distance.
Therefore, the velocity-time graph for a body in motion at constant velocity is always a straight line that rises from the x-axis at a constant slope, with no change in velocity. A straight horizontal line, with a slope of zero, would represent an object with zero acceleration.
However, that graph does not depict constant velocity motion; instead, it depicts a stationary object. A line with a negative slope would represent an object traveling in the opposite direction. A line with a positive slope would represent an object moving in the same direction. In a constant velocity motion, the magnitude of the velocity does not change over time.
In physics, constant velocity motion is motion that takes place at a fixed rate of speed in a single direction. Velocity is a vector measurement that indicates the direction and speed of motion. The magnitude of the velocity vector remains constant in constant velocity motion.
The constant velocity motion is represented by a straight line on a velocity-time graph. The gradient of the line represents the object's velocity. The object's acceleration is zero in constant velocity motion. This implies that the object is neither accelerating nor decelerating, and its velocity remains constant. The constant velocity motion is also known as uniform motion because the object moves at a fixed speed throughout its journey.
A velocity-time graph for an object moving with constant velocity would have a straight line that rises from the x-axis with no change in velocity. The line would be straight because the velocity of the object does not change over time.
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A 0.5 kg block moves to the right and collides with a 3.5 kg block in a perfectly elastic collision. If the initial speed of the 0.5 kg block is 4 m/s and the 3.5 kg starts at rest. What is the final velocity (in m/s) of the 0,5 kg block after
collision?
The final velocity of the 0.5 kg block after the perfectly elastic collision is 4 m/s.
mass m1 = 0.5 kg
v1_initial = 4 m/s
mass m2 = 3.5 kg
v2_initial = 0 m/s
The conservation of momentum can be utilized to find the total speed before collision which is equal to the total speed after collision.
m1 * v1_initial + m2 * v2_initial = m1 * v1_final + m2 * v2_final
Substituting the values into the equation,
(0.5 kg * 4 m/s) + (3.5 kg * 0 m/s) = (0.5 kg * v1_final) + (3.5 kg * v2_final)
2 kg m/s = 0.5 kg * v1_final + 0 kg m/s
It is given that the collision is perfectly elastic, kinetic energy is used here.
The kinetic energy of an object formula is:
KE = (1/2) * m * [tex]v^2[/tex]
= (1/2) * m1 * + (1/2) * m2 * v2_[tex]final^2[/tex] = (1/2) * m1 * v1_[tex]final^2[/tex] + (1/2) * m2 * v2_final
= (1/2) * 0.5 kg * [tex](4 m/s)^2[/tex] + (1/2) * 3.5 kg * [tex](0 m/s)^2[/tex] = (1/2) * 0.5 kg * v1_[tex]final^2[/tex] + (1/2) * 3.5 kg * v2_[tex]final^2[/tex]
= 4 J = (1/2) * 0.5 kg * v1_final^2 + 0 J
Substituting v2_final = v1_initial = 4 m/s, we get:
2 kg m/s = 0.5 kg * v1_final + 0 kg m/s
2 kg m/s = 0.5 kg * v1_final
4 kg m/s = v1_final
Therefore, we can infer that final velocity of the 0.5 kg block is 4 m/s.
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