You want to heat 1 kg of water 10 degrees celsius and you have the following methods under consideration. The heat capacity of water is 4.184 J/K g.

Question

(a) You can heat it with a mechanical eggbeater that is powered by a 1-kg mass on a rope over a pulley. How far does the mass have to descend in the earth's gravitational field to supply enough work?
(b) You can send 1 A through a 100 ohm resistor. How long will it take?

Answer 1

try to think about it you stupid cun