Give one example which describes Newton's first law of motion.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

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.

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?