A 238 kg cast-iron car engine contains water as a coolant. Suppose the engine's tempera- ture is 33C when it is shut off and the air temperature is 8C. The heat given off by the engine and water in it as they cool to air temperature is 4.4 × 106 J. What mass of water is used to cool the engine? The specific heat of water is 4180 J/kg · C and of iron 450 J/kg · C.