Which of the following metals has maximum thermal conductivity?

(A) Iron

(B) Aluminum

(C) Silver

(D) Copper

c) Assume the aluminum and copper rods (each with the length 20cm,diameter 4mm) are connected together with a joint of perfectthermal conductance. One end of the Cu is held at 0 C and one endof the Al is held at 50 C. Find the heat current through the rodand the temperature of the joint, T_joint.

Al: Density=2700kg/m^3 , Specific Heat c = 900J/kgK, thermalconductivity k=235 W/mK

Cu: Density=8900kg/m^3 , Specific Heat c = 392.2J/kgK, thermalconductivity k=401W/mK

Which of the following is a poor conductor of heat?.

A. silver.

B. aluminum.

C. gold.

D. copper.

E. air.

How can you tell the difference if its a poor conductor or not?

 Define what is Thermal Conductivity?