Question

49. One end of a rod of length 20 cm is inserted in a furnace
at 800 K. The sides of the rod are covered with an
insulating material and the other end emits radiation
like a blackbody. The temperature of this end is 750 K
in the steady state. The temperature of the surrounding
air is 300 K. Assuming radiation to be the only
important mode of energy transfer between the
surrounding and the open end of the rod, find the
thermal conductivity of the rod. Stefan constant
0=60 10 -8 W m K 4​

Answer 1

Answer:

Apply Q=mcdelta t formula