You Are Testing Thermal Conduction Through Two Different Materials,A and B,of

Multiple Choice

You are testing thermal conduction through two different materials,A and B,of the same cross-sectional area.Material A is twice as thick as material B,and the thermal conductivity of material A is three times higher than that of material B.What is the thermal resistance of A divided by the thermal resistance of B?

A) 6.0
B) 1.5
C) 5.0
D) 0.67
E) 0.17