A 1 gigawatt electrical power plant is 40% efficient.
(a) If coolant water flows through it at a rate of 2.16 x 105 m3/ hour, by how many degrees Celsius is the coolant water heated? (Waters specific heat is 4 186 Jikg and its density is 103 kg/m3 .)
(b) If the power plant uses evaporative cooling, how much water is evaporated per second? (It takes about 2.5 x 106 J to heat up and evaporate 1 kg of water.)