Your water bottle is full of water at room temperature. picky you wants the water 1.00 kelvin warmer. instead of heating it up in the microwave or on the stove, you decide to drop it from 1 meter multiple times, reasoning that most of the gravitational pe eventually goes to heating up the water (pe → ke just before hitting the ground → a change in internal energy of the water in the water bottle). assuming all this energy goes into heating up the water, how many times do you have to drop the water bottle from 1 meter to warm it up the required amount?

Sublimation- which change of state is shown in model

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j

Bis the answerhope it !