Answer: As a person pushes a box across a floor, the energy from the person's moving arm is transferred to the box and floor become warm during this process, energy is conserved
Answer:
so am i ._. 15 not 1 ofc lol
Explanation:
Because the coefficient of friction depends on the surface
The energy carried by a single photon is given by
where h is the Planck's constant and f is the frequency of the photon.
The photon of our exercise has a frequency of
, therefore its energy is
<span>Step 1 of 3
Calculate the magnitude of the earth’s velocity.
The radius of earth orbit around the sun is .
Time taken to complete one revolution is .
Convert time from days into seconds.
The expression for magnitude of earth velocity is,
Substitute for , for .
Further solved,
Explanation | Common mistakes | Hint for next step
Time taken to complete one resolution is 365 days. Convert time from days into seconds. Radius of earth orbit around the sun is given. Velocity is circumference of orbit upon time taken in one resolution. Calculate the magnitude of earth velocity. Change unit of velocity to
Step 2 of 3</span>
