A metal bar is used to conduct heat. When the temperature at one end is 100$\degree$C and at the other is 20$\degree$C, heat is transferred at a rate of 16 J/s. If the temperature of the hotter end is reduced to 60$\degree$C, what will be the rate of heat transfer?
A) 4 J/s
B) 8 J/s
C) 9 J/s
D) 12 J/s

Question

Quizplus · Accepted Answer

The rate of heat transfer is proportional to the temperature difference. Initially, the difference is 80°F (100°F - 20°F). When the hotter end is reduced to 60°F, the difference becomes 40°F (60°F - 20°F), which is half of the initial difference. Therefore, the rate of heat transfer will also be halved, resulting in 8 J/s.

A Metal Bar Is Used to Conduct Heat °\degree° C and at the Other Is 20

A Metal Bar Is Used to Conduct Heat $\degree$ C and at the Other Is 20