Answer:
v=28.28m/s t=14.14s average velocity =2m/s
Explanation:
Starting at rest the initial velocity is 0 substituting that in the first equation of motion v=u+atgives the final velocity but we first have to determine the time using the third equation of motion which is s=ut+1/2at^2 and then do the substitution. Average velocity is the determined by adding the initial and final velocity then divide it by 2
If Bert the Bat travels eastward at 40 mph with a tailwind of 6 mph, what is his actual speed?
Answer:
36 mph.
Explanation:
Now Albert here is using the wind to his advantage but if say there was no wind then he would not have the 6 mph behind him so we subtract 6 from 40 to get 36. hope this helps :)
In a parachute, falling steadily at 7.5m/s, how long does it take to reach the ground from 3,000 m high?
Answer:
25 minutes
Explanation:
exmple of relative velocity
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People also ask
What are some examples of relative motion?
Relative Motion refers to the motion or speed of any object in respect to a particular point. For example, a ball thrown upward while in a moving object such as a bus, would be traveling the same speed with respect to the bus and would fall again in relation to that speed.
Answer:
The example of relative velocity - a boat crosses a river that is flowing at some rate or an aeroplane encountering wind during its motion.
Why water in a container is curved but not flat
what is gravitational ? what are the factors that affect gravition ? witre the SI unit of gravition
The gravitational force is a force that attracts any two objects with mass. Two major factors, mass and distance, affect the strength of gravitational force on an object.Newtons kg-2 m2 is it's SI unit.
6. 498.82 mg comverted to kg
Answer:
0.00049882 kg
........................
Answer:
498.82 mg=0.00049882 kg
Explanation:
To get this answer, you must multiply the quantity of mg by 0.000001, which is also 0.001². Since one gram is 1000 mg, and 1000 g is 1 kg, you must divide the amount of mg by one million, or multiply by 1/1000000, or 0.000001. I hope this helped you. Enjoy your day, and take care!
True or false: Pluto is a dwarf planet
Answer:
Pluto is a dwarf planet. Turr
Defects of vision and their correction drawing
No Spams ❌❌
Answer:
Vision Correction
You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.
Explanation:
hope this helps
39 liters of water at
20 °C are mixed with
21 liters of water at
60 °C. What is the
temperature of the
mixture?
Answer:
Temperature of the mixture=8 °C
Explanation:
Let, Temperature of the mixture=t °C
Q₁ = Q₂
=> m₁SΔΘ₁ = m₂SΔΘ₂
=> 39 × (20+t) = 21 × (60-t)
∴ t = 8 °C
hope you have understood this
pls mark it as the brainliest
Plsss helppp me I have a lot of questions pls help me I will mark brainliest!!!
Answer:
kilo means 1000
2a. 0.1
b. 100
c.0.01
d. 0.001
3a.km
b.mL
d.cg
e.mm
g. g
h.kL
What do you know about nuclear energy?
Answer:
Nuclear energy comes from splitting atoms in a reactor to heat water into steam, turn a turbine and generate electricity. Ninety-three nuclear reactors in 28 states generate nearly 20 percent of the nation's electricity, all without carbon emissions because reactors use uranium, not fossil fuels.
please follow meMetric conversions
SHOW WORK!!!
1.) 15m —> dm
2.) .023 cc —> L
3.) .00049 km —>
4.) 0.25 kg —> g
5.) 15g —> hg
[tex]\\ \sf\longmapsto 15m[/tex]
[tex]\\ \sf\longmapsto 15(10)[/tex]
[tex]\\ \sf\longmapsto 150dm[/tex]
2:-1L=1000cm^3[tex]\\ \sf\longmapsto 0.023cm^3[/tex]
[tex]\\ \sf\longmapsto 0.023\times 0.001[/tex]
[tex]\\ \sf\longmapsto 0.00023L[/tex]
3:-1km=1000m[tex]\\ \sf\longmapsto 0.00049km[/tex]
[tex]\\ \sf\longmapsto 0.00049(1000)[/tex]
[tex]\\ \sf\longmapsto 0.49m[/tex]
4:-
1kg=1000g[tex]\\ \sf\longmapsto 0.25kg[/tex]
[tex]\\ \sf\longmapsto 0.25(1000)[/tex]
[tex]\\ \sf\longmapsto 250g[/tex]
5:-
1g=0.0001hg[tex]\\ \sf\longmapsto 15g[/tex]
[tex]\\ \sf\longmapsto 15(0.0001)[/tex]
[tex]\\ \sf\longmapsto 0.0015hg[/tex]
A sled is moving at a constant speed down a surface inclined at 45.0° with the horizontal and travels 30 meters in 4 seconds. Calculate the vertical velocity of the sled at the end of 4 seconds.
Explanation:
msndskkdkekskdkdkjejdkdkd
What is the magnitude of a vector if the x component is -12 m and the y component is 21m?
Answer:
22.02
Explanation:
(-21)²+(12)²=r²
r=√585
r=22.02
Two trucks left the warehouse at the same time and drove in
the same direction along a straight road. One truck drove at 68
km/h while the other drove at 57 km/h. Find theirs distance
apart after2 hours.
A hydraulic lift has pistons with diameter 28cm and 70cm, respectively. If a force of 500 N is exerted at the input piston. What is the maximum load that can be lifted the output piston?
Answer:
3125 N
Explanation:
diameter /2 =radius
so r1 =14cm , r2 =35cm
f1/A1 =f2/A2.
f2 = f1 × A2 / A1
=500×1225 pi cm² / 96 pi cm²
f2 =3125N
Venus
Mars
It has no atmosphere due
to weak gravity.
Europa
It is too hot for liquid
water to exist.
--
Earth's moon
1
1
1
It is too cold for liquid
water to exist on the
surface.
?
Scientists believe it used
to have flowing liquid
water.
SUBMIT
Answer:
Earth is the only known planet to have bodies of liquid water on its surface. Europa is thought to have subsurface liquid water. ... Evidence points to water on other planets in our solar system. In 2015, NASA confirmed that liquid water flows intermittently on present-day Mars
Mark me a brainlist
8. Define resistance and resistivity and also give the relation between them. Explain the
dependence of resistance on temperature.
I huhs burn for
Answer
I hope it's helps you
if u can solve these with work i will literally love u forever
Answer:
I cant open it neither I can download it!
An 80-kg person running at 4 m/s will have a momentum of _______ kg-m/s.
Answer:
320 Ns
Explanation:
As P=mv
So,
80(4)=320
Calculate the number of moles in i) 27g of Al ii) 1.51 x 102 molecules of NHAC Give the salient features of "Modern atomic theory" Derive the relationship between Relative molecular mass and Vapour density.
1 point
30. A ray passing through the centre of curvature of a concave mirror.
after reflection is reflected back along the same path. Which is the correct
figure for the above statement.
Explanation:
when the object is between the pole and focus
Is it possible for two different objects to have the same speed but different velocities? Explain your answer.
Yes
Explanation:
Objects have the same velocity only if they are moving the same speed and in the same direction. objects moving at different speeds, in different directions or both have different velocities
Answer:
yes
Explanation:
speed and velocity are the same thing, except that velocity includes a direction.
ex.
if two things are traveling at 3mi/h, then thats the same speed. but if one is going north and the other south, then those are two different velocities
specific heat capicity of water is 4200Jkg-1 C-1 . what its meaning .
The specific heat capacity of water is 4,200 Joules per kilogram per degree Celsius (J/kg°C). This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C. Lead will warm up and cool down faster because it doesn't take much energy to change its temperature.
Why is running or jogging good aerobic excercise? Explain
Answer:
Running is faster, uses more kilojoules and demands more effort from the heart, lungs and muscles than jogging. Running requires a higher level of overall fitness than jogging. Both running and jogging are forms of aerobic exercise.
Explanation:
Un alumno menciona que al abrir la ventana de su casa sintió cómo el frío ingresaba a su cuerpo. Menciona cuál es la verdadera razón por la cual el niño tuvo la sensación de frío. *
a) Porque el aire tiene una temperatura menor que la de su cuerpo; por eso se propaga más rápido.
b) Porque la temperatura de su cuerpo, siente el aire frio que entra por la ventana.
c) Porque el calor de su cuerpo se propaga al medio ambiente, al ser la temperatura del niño mayor que la del aire exterior.
d) Porque la temperatura del aire es igual a la temperatura del cuerpo.
Answer:
My believe the answer is
A.) or B.)
Explanation:
Here is why I think A is the answer.
If we use the process of elimination, it would look like this,
a) Porque el aire tiene una temperatura menor que la de su cuerpo; por eso se propaga más rápido.
This makes sense because we all know in winter the weather is very cold and freezing.
b) Porque la temperatura de su cuerpo, siente el aire frio que entra por la ventana.
I feel like this answer is the question, but it could also be an answer, sorry, I'm a little uncertain.
c) Porque el calor de su cuerpo se propaga al medio ambiente, al ser la temperatura del niño mayor que la del aire exterior.
This answer has nothing to do with the question, plus it is very false, our body heat is not enough to overcome the very cold temperature from outside.
d) Porque la temperatura del aire es igual a la temperatura del cuerpo.
This is false because again our body heat is not even compared to the freezing cold temperatures from the winter.
Well, have a nice rest of the day!ba baiii!
The P.E stored by a mass spring system at an extension of 2 cm is 10 J. The P.E stored by the same system at an
extension of 4 cm will be:
Explanation:
extension(x) = 0.02m When the P.E is 10J.
extension(x)= 0.04m PE?.
P.E is proportional to Extension²
P.E/x² = P.E"/x"²
10/(0.02)² = P.E/(0.04)²
P.E= 10x(0.04)²/(0.02)²
P.E= 40J
Weight is equal to:
A. mg^2
B. m/g
C. mg
D. m^2g
A baseball diamond is a square (don’t be fooled that it is usually shown rotated by 45°). Each side of the square is 90 feet long (to two significant figures). How far must a fielder throw the ball from second base to home plate?
A line from second to home creates a right triangle with 45 degree angles.
This makes the diagonal line the side length of the square multiplied by the sqrt(2)
Second to home = 90sqrt(2) = 127.279 feet ( round answer as needed)
calculate the potential difference between points x and y
Answer:
4.275v
Thank you
Answer:
-4.27
Explanation:
hope this may help you TQ.