Four objects are situated along the y axis as follows: a 1.90 kg object is at 2.95 m, a 2.96 kg object is at 2.41 m, a 2.59 kg object is at the origin, and a 4.05 kg object is at -0.494 m. Where is the center of mass of these objects

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.