An unisulated piston-cylinder contains 1.53 kg of water initially at 200C and 400kPa. The water is now allowed to cool while a paddle wheel inputs work to stir the water and maintain a uniform temperature. The water ultimately becomes saturated vapor at 400kPa. The net energy transfer (kJ) to the water is:

If football was tossed in air without gravity or friction the ball would go into space

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