Question

2. The temperature difference between opposite face of a square plate of side 4 cm of a copper plate of thickness 4 mm. is 40°C. Calculate the amount of heat transmitted between its opposite faces per sec. (K for copper is 0.92 C. G. S. unit). ​

Answer 1

Answer:

Amount of heat transmitted between faces =1472 calorie.

Explanation:

side of a square plate = 4cm

Area of the square = 4*4=16$cm^2$

Thickness of the copper plate is = 4mm=0.4cm

thermal conductivity of the copper in cgs unit is =0.92

Temperature difference between two faces is given by = 40°C

The formula connecting heat and conductivity is given by

$Q=\frac{KA\Delta T}{l}=\frac{0.92*16*40}{0.4}=1472 cal$

amount of heat transmitted between faces =1472 calorie.