Answer: When a child is riding on a sled down a steep, snow-covered hill, his elevation decreases and hence Kinetic energy increases and potential energy decreases.
i think this will help you
I think the first one may be bicycle. Not sure about the others though, sorry.
Answer:
Explained
Explanation:
The aperture is the place through which all the light enter into the telescope.
when the aperture is bigger more light coming from outside enter the telescope, hence a bigger and clearer image is seen. That is why scientists say the bigger the better.
Moreover, the resolution of the telescope is inversely proportional to the diameter of the aperture.
Explanation:
In terms of heat, we can say the dropped ball gained more heat as the potential energy changes to kinetic energy.
Thermal energy is a form of kinetic energy formed as a result of the movement of the particles of a medium.
As the ball falls through the height, it collides with the ground frictional heating between air and the ball, and that of the ball and the surface causes the change in temperature after the collision.
In terms of heat, the ball has transformed kinetic energy into frictional heating after collision causing an increase in temperature after collision.
Potential energy to kinetic energy to heat energy
learn more:
Thermal energy brainly.com/question/914750
#learnwithBrainly
Answer:
s = 30330.7 m = 30.33 km
Explanation:
First we need to calculate the speed of sound at the given temperature. For this purpose we use the following formula:
v = v₀√[T/273 k]
where,
v = speed of sound at given temperature = ?
v₀ = speed of sound at 0°C = 331 m/s
T = Given Temperature = 10°C + 273 = 283 k
Therefore,
v = (331 m/s)√[283 k/273 k]
v = 337 m/s
Now, we use the following formula to calculate the distance traveled by sound:
s = vt
where,
s = distance traveled = ?
t = time taken = 90 s
Therefore,
s = (337 m/s)(90 s)
<u>s = 30330.7 m = 30.33 km</u>
