PROBLEM

$(1)$ A metal plate is maintained at $300C$ and is exposed to surrounding air at $30C.$ Thermal conductivity

and emissivity of the plate are $25\frac{W}{m}-K$ and $0\mathrm{.}8$ respectively. It convects and radiates heat to the

surroundings. If the convection coefficient is $25\frac{W}{m^2}K,$ what is the temperature gradient in the plate

and heat flux? State the impiortant assumptions and draw the thermal circuit.

$[$Ans: $-450\mathrm{.}3\frac{K}{m},11\mathrm{.}26k\frac{W}{m^2}]$