1. (a) Define heat and temperature. (b) Convert -128.6 'F to the Celsius scale. (c) The temperature of 200 g of water decreases from 20 'C to 0 "C in 10 minutes. Calculate i. the heat lost by the water. ii. the rate at which the water is losing heat. Ill. the time taken for the water at 0 "C to turn completely into ice. (d) A 20 kg brick stands upright on the ground as shown. What is the pressure it exerts on the ground? 20 cm 5 cm 10 cm