P. 4385. Water is heated in a thermally insulated container with an immersion heater. During 60% of the heating time the water, initially at a temperature of 19 oC, the water comes to the boil, and then some part of the water is boiled down, 18 g in each minute becomes steam.
a) What per cent of the water boils down?
b) What is the power of the immersion heater in watts?
Deadline expired on 12 December 2011.