1.

. A hot object loses heat to its surroundings in the form of heat radiation. The rate of loss of heat depends on the : (1) • temperature of the object • temperature of the surroundings • temperature difference between the object and its surroundings • average temperature of the object and its surroundings

Answer»

Radiation

The rate heat lost though radiation depends on the temperature DIFFERENCE between the object and its surroundings.

Explanation

Heat loss through is GIVEN by

P=\epsilon\sigma A(T^4-T_0^4)

where

\epsilon = Emissivity of the object

\sigma = Stefan-Boltzmann CONSTANT = 5.67\times 10^{-8}\ \text{W/m}^2\text{K}^4

A = Surface area of object

T = Temperature of object in Kelvin

T_0 = Temperature of SURROUNDING in Kelvin.

It can be seen that rate heat lost though radiation depends on the temperature difference between the object and its surroundings.

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