The Ends of a Cylindrical Steel Rod Are Maintained at Two

Multiple Choice

The ends of a cylindrical steel rod are maintained at two different temperatures.The rod conducts heat from one end to the other at a rate of 10 cal/s.At what rate would a steel rod twice as long and twice the diameter conduct heat between the same two temperatures?

A) 5 cal/s
B) 10 cal/s
C) 20 cal/s
D) 40 cal/s
E) 80 cal/s