A player hits a tennis ball into the air with a velocity of 10 m/s at an angle of 60° to the horizontal.
i) What was the initial horizontal velocity of the ball?
ii) What was the initial vertical velocity of the ball?

Answer:343m

Explanation:

Answer:

Reduce friction

The frequency of Sound A is 440.3 Hz.

The resultant frequency of the sound A and sound B is calculated as follows;

Mathematically, the relationship between period and frequency of a wave is given as;

F = 1 / T

where;

The resultant frequency from the given graph is calculated as;

The period of the sound in the image = 0.3 s

F = 1 / T

F = 1 / 0.3 s

F = 3.3 Hz

If sound B = 437 Hz, the frequency of sound A which is greater is calculated as;

F ( A ) = 437 Hz  +  3.3 Hz

F ( A ) = 440.3 Hz

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The kinetic energy would be 96 J, for the car moving at 4m/s and with 3kg mass.

The kinetic energy (Ek) of the toy car is given by Ek = ½ mv2, where m is the mass of the car (3 kg) and v is the velocity (4 m/s). Thus, the kinetic energy of the car is 24 J. If the car were moving twice as fast (8 m/s), the kinetic energy would be 96 J. The units are Joules (J).

Kinetic energy is the energy of a body or system due to its motion. It is the energy that an object has due to its motion. Kinetic energy is equal to one half of the mass of the object multiplied by the square of its velocity.

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The car's acceleration can be calculated as: a = v2/R = (18.0 m/s) 2/(12.0 m) = 27.0 m/s2. The conventional method can be used to determine net force: 13500 N is equal to Fnet = m•a = (500 kg)•(27.0 m/s2).

It may slow down or decelerate when traveling uphill or straight ahead. Roller coasters accelerate as they travel down hills due to the force of gravity dragging them downward.

Calculus and other fundamental mathematical concepts are used to calculate the maximum speed, the angles of ascent and descent, and the height necessary for the automobile to climb the next hill. The roller coaster's safety is further ensured by these calculations.

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Electrical burns can occur in a variety of ways, including arc burns, low voltage burns, high voltage burns, mouth burns, flash burns, and flame burns.

Electric shock, a serious electrical mishap, or a fatal electrical event are all considered electrical incidents.

For the purposes of reporting and analysis, incident definition types let you attribute the appropriate type to safety events. Having only the two types of incidents—Accident and Near Miss—is one strategy.

An occurrence or scenario that has a number of serious repercussions and necessitates the implementation of special measures by one or more emergency responder agencies is referred to as a big incident.

Any electrical incident that results in or has the potential to result in: death or serious bodily harm to a person; significant property damage; or a serious risk to the public safety must be reported, according to the Electrical Safety (General) Regulations of 2019.

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Answer:

1.03 * 10^-5

Explanation:

The magnetic flux through the loop is approximately 1.317 × [tex]10^{(-5)[/tex]T·m².

To calculate the magnetic flux through a loop, we use the formula:

Φ = B × A × cos(θ)

Where:

Φ is the magnetic flux

B is the magnetic field strength

A is the area of the loop

θ is the angle between the magnetic field and the normal to the loop

Given:

Magnetic field strength (B) = 3.09 × [tex]10^{(-4)[/tex] T (east direction)

Area of the loop (A) = 0.0471 m²

The loop faces directly northeast

To find the angle θ,  determine the angle between the magnetic field direction (east) and the normal to the loop (northeast).

Since the loop faces northeast, the angle between the normal to the loop and the east direction is 45 degrees (90 degrees divided by 2).

Now calculate the magnetic flux:

Φ = B  × A  × cos(θ)

Φ = (3.09 × [tex]10^{(-4)[/tex] T) × (0.0471 m²) × cos(45°)

Using the value of cos(45°) as 0.7071:

Φ = (3.09 × [tex]10^{(-4)[/tex] T) × (0.0471 m²) ×0.7071

Φ = 1.317 × [tex]10^{(-5)[/tex] T·m²

Therefore, the magnetic flux through the loop is approximately 1.317 × [tex]10^{(-5)[/tex] T·m².

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Answer:

K = 5706.6 J

Explanation:

Given that,

The mass of a bullet, m = 50 g = 0.05 kg

The velocity of the bullet, v = 720 km/hr = 477.77 m/s

We need to find the kinetic energy of the bullet​. The kinetic energy of an object is due to its motion. It can be given by the formula as follows :

[tex]K=\dfrac{1}{2}mv^2\\\\=\dfrac{1}{2}\times 0.05\times 477.77 ^2\\\\K=5706.6\ J[/tex]

So, the required kinetic energy of the bullet is equal to 5706.6 J.

The frequency of the red light emitted by a neon sign with a wavelength of 659.9 nm is 4.5×10^14 Hz.

The frequency is the number of times a recurring occurrence takes place during a predetermined period. For example, if an event occurs twice in one second, then the frequency is 2 Hz (Hertz).

A recurring event's frequency is the number of times it happens in a predetermined period. For example, a frequency of a wave is the number of wave peaks passing a fixed point in one second.

The frequency is the number of times something occurs in a given period. For example, the frequency of a radio station is the number of times it broadcasts a signal per second.

Given:

Wavelength = 659.9nm

Speed of light = 3×10^8 m/s

Frequency = speed of light / wavelength

Frequency = (3.0 x 10^8 m/s) / (659.9 nm)

Frequency = 4.5 x 10^14 Hz

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It would take 5 pounds of force, that is equal force, to stop the ball from rolling because the same amount of force must be used to stop the object.

According to Newton's third law of motion, every action which is occurring in nature has an equal as well as an opposite reaction. For instance, if a particular object A happens to exert a force on another object B, then  object B will also be exerting an equal as well as an opposite force on  object A.

If a particular ball is rolling with 5 pounds of force then the same amount of reaction will be required to bring it to rest. That is, equal force of 5 pounds will be required to stop the ball.

Hence, option D is the correct option.

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Answer:

9.80665

Explanation:

Answer:

everything is perished isn't it?

hope it helps.

Answer:

isn't it is the answer of your question

hope it is helpful to you

By replacing the force system acting on the post with a resultant force and a couple of moments at point o we get total momentum of 1478.85 ft-lb.

As per the figure we have 3 forces: At the top 300lb left side 150lnb and at the middle 200lb.

first, we have to break down the forces into x and y components.

Now calculating each force separately:

∑Fₓ=300lb+cos 30°-150×4/3+200

=259.81-120+200

∑Fₓ=339.81lb.

Now, calculate the sum of y components.

∑Fy=300 sin 30°+150×3/5

∑Fy=300 sin 30°+90

∑Fy=240lb

Now we have to x and y components by these values we can find the actual force.

|F|=√Fx²+Fy²

|F|=√(339.81)²+(240)²                     α=tan⁻¹(∑Fₓ/∑Fy)

|F|=√115470.83+57600                      α=tan⁻¹(339.81/240)

|F|=√173070                                       α=35.23°

|F|=416.02 and 35.23°

the sum of moments at O

∑Mo=-Fx₃×2+Fx₂×4-Fx₁×6

∑Mo=-200(2)+4/5 150*4-3000cos30°(6)

∑Mo=-400+480-277.65

         =1478.85ftlb

∑Mo=1478.85ftlb

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Answer: Hope This Helps!

Explanation:

1: The first one is true because, if it was full there would be more weight and you would have to apply more force for it to start moving. But an empty one you don't have to apply so much force to it. (Newtons 2nd Law.)

2: The second one is true because, the skate board has a lot of kinetic energy and when it hits the rocks a collosion occurs where all the enrgy points into the front of the board and the back side lifts of the floor so it flips over the rock.(Newtons 1st Law.)

3: The third one is false because, the road cant push onto the tire the tire can push onto the road though. Additional information: Also the when the tire pushes on the road friction happens and because of the rough surface of the road.(Newtons 3rd Law.)

As air is blowing across the top of a soft drink bottle, it reverberates. The frequency grows as the chamber's length lengthens.

The frequency of physics is the number of waves that pass by a specific location in a time period. According to this concept, how several cycles or waves do a body in periodical motion experience in a single unit of time?

The distance between normal incidence (adjacent crests) in adjacent cycles determines how far a waveform signal has traveled in place or over a wire. In wireless systems, this length is often expressed in metres (m), centimeters (cm), or millimeters (mm) (mm).

Therefore, As air is blown, a soda pop bottle reverberates.

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Answer:

The "pressure" of the electricity is electric potential. Electric potential is the amount of energy available to push each unit of charge through an electric circuit. The unit of electric potential is the volt. ... A volt is the force needed to move one amp through a conductor that has 1 ohm of resistance

Answer:

Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en calorías

Explanation:

Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en calorías

E) the Moon lacks wind, water, and an atmosphere. The average rate of erosion on the Moon is far less than on Earth because

What is atmosphere?

Atmosphere is the layer of gases surrounding the Earth, composed of nitrogen, oxygen, and other trace elements. It is held in place by the Earth's gravity and is responsible for the air we breathe, the weather we experience, and the climate of the planet.

The atmosphere is also important for providing protection from harmful ultraviolet radiation from the sun and reducing the temperature extremes on the Earth's surface.

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Answer: +/- 71,65 Calorías

Explanation: Se deduce que la fuerza aplica para aumentar o disminuir la energía del generador.

+/- x Calorías

X = Equivalente de 300 Joules en calorías

Para poder pasar Joules a calorías.

Hacemos una regla de 3 simple

1 Calorías = 4,18 Julios

0,2392 calorías = 1 Julio

(  1 / 4,18 = 0,2392 calorías)

300 Julios = 71,65 calorías

(0,2392 calorías x 300 julios = +/- 71,65 calorías)

The largest force that an energy source containing 100 joules can exert continuously over a distance of 25 meters is 25 Newtons (N).

This means that the energy source can exert a force of 25 N for every 100 joules of energy it contains.

The equation for calculating force is Force = Work/Distance (F = W/D).

So, in this case, Force = 100 Joules/25 Meters = 25 Newtons.

Force is a push or pull exerted on an object. It is measured in units of Newtons (N) and is calculated by dividing the amount of work done by the distance over which the work is done. Force can be used to cause an object to accelerate, change its direction, or change its shape.

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The correct option is B, The electron's speed at f is equal to its speed at i.

Electrons are subatomic particles that are found in atoms. They are the negatively charged particles that orbit the nucleus of the atom, and they have an extremely small mass. Electrons travel at different speeds depending on their energy level. At their lowest energy level, electrons move at an extremely slow speed, about one thousandth of the speed of light. As the electrons gain energy, their speed increases.

In a vacuum, when electrons have the highest energy level, they can travel at a speed of nearly the speed of light, which is around 186,000 miles per second. In a vacuum, the electrons would have the same speed regardless of their mass. Electrons also move slower inside a material, such as a metal, due to the presence of other atoms. Electrons in metals usually move at a speed of about 1/10th the speed of light. This slower speed is due to the electrons having to pass through energy barriers created by the other atoms in the metal. In general, electrons are very fast particles that can travel at speeds up to nearly the speed of light.

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Force is positive if the mass accelerates downward. Use the formula T = M x A to determine the tension in the rope.

That direction is the pull that is referred to as tension. As a result, the tension will point toward the string or rope and away from the mass.

A mass suspended by a string is pulled upward by the string, exerting an upper force that shifts the tension to the upper side.

For instance, you should know that T = 9g x 2m/s2 = 18gm/s2 or 18N when trying to calculate T in a straightforward pulley system with a linked mass of 9g and an upward acceleration of 2m/s2 (newtons). The direction in which a string expands changes when it passes over an ideal massless pulley, but the string's tension is unaffected.

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The electric field strength at point (x,y) = ( 25 mm ,0cm) is =16321.0769 N/C

The electric field strength at point (x,y) = (0cm, 25 mm) is =35321.58999 N/

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The electric field strength at point (x,y) = ( 20 mm ,0cm) is =16321.0769 N/C

The electric field strength at point (x,y) = (0cm, 20 mm) is =35321.58999 N/C

A vector is a quantity with both a magnitude and a direction, like the electric field. The vector's magnitude corresponds to the electric field intensity.

Each point in space has an electric field associated with it when there is charge present in any form. E, often known as electric field strength, electric field intensity, or just the electric field, is a mathematical constant that expresses the strength and direction of an electric field.

Given:

Charge = 5.0 nC

x = 25 mm, y = 0 cm

The electric field at any given point of the dipole is given as:

E= (KP) ÷ (r^2 + a^2)^3/2

Where:

K = 9x10^9 Nm^2/c^2 (coloumb constant)

P = (0.003) (5x10^-9c) which is the movement of the dipole

(0.003) is arrived at when mm is converted to m. 3.0 mm space apart was converted to a meter.

r= the point, in the question above is 20mm = 0.02m

Now, the electric field (E),

E = (KP) ÷ (r^2 + a^2)^3/2

= (9x10^9 Nm^2/c^2) (0.003 m) (5x10^-9c) ÷ [ (0.02m)^2 + (0.003)^2]^3/2

= 0.135 ÷ (8.271513x10^-6)

=16321.0769 N/C

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The kinetic energy will the ball acquire from the bat is 1.0x10^1 joules or 100 joules. This calculation is based on the equation Energy = Force x Distance, which is a fundamental equation of physics.

The kinetic energy of the ball is equal to the work done by the bat on the ball. The work done by the bat on the ball is equal to the force applied by the bat multiplied by the distance the bat stays in contact with the ball. Therefore, the kinetic energy of the ball would be equal to 2.0x10^4 newtons multiplied by 5.0x10^-3 meters, which is equal to 1.0x10^1 joules or 100 joules.

This calculation is based on the equation of  Energy which is  Force x Distance. Additionally, this equation can be rearranged to solve for any of the variables, depending on what is known and what needs to be calculated. In this case, the known variables were the force applied by the bat and the distance the bat stayed in contact with the ball, and the variable that needed to be calculated as the kinetic energy of the ball.

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After that, we will calculate the temperature, total enthalpy, and masses of each water phase using the steam table.

Given the water's initial mass and pressure, we can determine whether it is superheated or saturated by utilizing a steam table. On a variety of scales, including the Fahrenheit and Celsius systems, temperature is a unit that is used to denote hotness or coolness.

Heat energy will logically go from a hotter (body with a higher temperature) to a colder (body with a lower temperature) according to temperature (one at a lower temperature).

A comparison of a substance's temperature to a set of hot and cold reference values can be used to determine its temperature. The letter "T" stands for "temperature," which is denoted by the SI unit of "°C."

The three scales that are most frequently used to measure temperature are the Celsius scale, the Fahrenheit scale, and the Kelvin scale.

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Answer:

The human causes for fire ignition are:

--> fireworks

--> Crime concealment

The natural causes of fire ignition are:

--> Lightning strikes

--> volcanic eruptions.

Explanation:

Heat is a form of energy that can be transferred from one object to another. The combination of a heat source, sufficient oxygen levels and oxidative agent can lead to ignition of fire. Any type of fire ignition has been known to cause a disaster call wildfire.

Fire ignition source can be grouped into two main categories:

--> Human ignition: This is further grouped into three main categories which includes: accident, negligence and voluntary. FIRE WORKS is an example under the negligence category of human fire ignition source. Humans can unintentionally set up fire through the uncontrolled use of glowing objects such as firecrackers. While crime concealment is an example under the voluntary category of human fire ignition source. Here,an individual can intentionally set up fire to conceal a primary crime scene in order to hide evidence.

--> Natural ignition: These are fire origins in which does not involve humans in any way. The LIGHTNING STRIKE is the main example of natural ignition source of fire. This occurs when little to no rain accompanies a stormy weather disturbance. These strikes occurs more frequently in elevated site which can lead to wildfire. While VOLCANIC ERUPTIONS is also an example of a natural ignition source. This occurs when hot molten magma pushes through vents into the earth surface. The explosive nature of this eruption can lead to fire ignition.

Explanation:

50 meters north in 10 seconds.

speed = distance ÷ time = 50 meters ÷ 10 seconds = 5m/s

Example of erosion: Wind carries small pieces of rock away from the side of a mountain.

Erosion is the procedure by which the surface of the Earth gets worn down. Erosion can be created by natural elements such as erosion as wind and glacial ice. But everyone who has ever seen a picture of the Grand Canyon knows that nothing strikes the erosion slow steady movement of the water when it comes to commuting the Earth

Rain, rivers, floods, lakes, and the ocean convey away bits of soil and sand and slowly wash away the deposit. Rainfall produces four types of soil erosion: splash erosion, sheet erosion, rill erosion, and ravine erosion.

So we can conclude that Erosion is a ruinous force that wears away land features.

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