A metal bar is used to conduct heat.When the temperature at one end is 110°C and at the other is 15°C,heat is transferred at a rate of 19 J/s.If the temperature of the hotter end is reduced to 90°C,what will be the rate of heat transfer?

Question

Quizplus · Accepted Answer

The rate of heat transfer is proportional to the temperature difference. Initially, the difference is 95°C (110°C - 15°C). When the hotter end is reduced to 90°C, the difference becomes 75°C (90°C - 15°C). The new rate is (75/95) * 19 J/s = 15 J/s.

A Metal Bar Is Used to Conduct Heat