17. A baseball bat strikes a ball head-on with an average force of 2.0 x 104 newtons. If the bat stays in contact with the ball for a distance of 5.0 x 103 meter, what kinetic
energy will the ball acquire from the bat?

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.