The Physics of Roller Coaster Energy

A 650-kg roller coaster car starts from rest at the top of the first hill at height 26m and rolls down the frictionless track and passes through second hill at height 16m, third hill at height 9m and reach end of ride. Calculate the gravitational potential energy at...

Heat exchanger for rejection

  Refrigerant R-134a enters the condenser (heat exchanger for rejection) of a heat pump at 700 kPa and 40 °C and a mass flow rate of 0.02 kg/s. It leaves the condenser as saturated liquid at the same pressure. The compressor consumer 1.2 kW power. Determine (a)...