A heater supplies 1 W power to one end of a cylindrical rod of
Al with diameter 4mm and length 20 cm. The other end is held at
room temperature (20 C).
Al: Density = 2700, Specific Heat (c) = 900, Thermal
Conductivity (k) = 235
Cu: Density = 8900, Specific Heat (c) = 382, Thermal
Conductivity (k) = 401
A.) Find the temperature of the hot end.
B.) Find the temperature of the hot end if the rod is copper
C.) Assume that the aluminum and copper rods (each with length
20cm, diameter 4mm) are connected together with a joint of perfect
thermal conductance. One end of the Cu is held at 0 degrees C and
one of the Al is held at 50 degrees C. Find the heat current
through the rod AND the temperature of the joint (Tj).