Suppose someone pours 0.250 kg of 20.0ºc water (about a cup) into a 0.500-kg aluminum pan with a temperature of 150ºc. assume that the pan is then placed on an insulated pad and that a negligible amount of water boils off. what is the temperature when the water and pan reach thermal equilibriuma short time later?

Answer form flower;

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