Gan atwood machine has two hanging masses, m1 and m2, attached with a massless string over a pulley. if the pulley spins, rather than allowing the string to change direction without spinning, has mass m3, radius r, and moment of inertia equal to that of a disk, what is the tension force down on each side of the pulley?

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.