A) How much heat is needed to raise the temperature of a 3.5 kg steel pot containing 3.0 kg of water from 28 oC to the boiling point and then to boil away 2.0 kg of the water? b) If heat is supplied to the pot of water at the rate of 150 cal/minutes, how long will this take?

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.

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?

Why is the use of carbon-14 limited