A ball is thrown upward with an initial velocity of 13 m/s. Using the approximate value of g = 10 m/s2, what are the magnitude and direction of the velocity: (a) 1 second after it is

thrown? (b) 2 seconds after it is thrown?

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to 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.

What is an electric motor? explain its operation. 2-3 sentence