Answer: Work W = 0
Explanation: Work W = F·s. Because rock does not move, s = 0 and
work done is zero.
The transition from gas to liquid is called condensation. An example would be water droplets forming on an ice cold glass placed in room temperature.
Answer:
20 seconds
Explanation:
The equation for Power is:

Which means...

We can plug in the given values into the equation:


The vertical velocity is affected by the acceleration of gravity (ignoring the effects of air resistance usually)
A would be most useful (Carbon dating)