Write down three examples of machines (different from ones in the lesson) in each category below.

1.machines that you go faster
2.machines that you do things you could not otherwise do
3.machines that make you stronger
4.machines that put force where you want it

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.