A solid aluminium sphere and a solid copper sphere of twice the radius are heated to the same temperature and are allowed to cool under identically surrounding temperatures. Assume that the emissivity of both the spheres in the same. Find the ratio of
A
the rate of heat loss from the aluminium sphere to the rate of heat loss from the copper sphere and
B
the rate of fall of temperature of the aluminium sphere to the rate of fall of temperature of the copper sphere. The specific heat capacity of aluminium 
and that of copper 
. The density of copper 
times the density of aluminium.
and that of copper . The density of copper times the density of aluminium.
Text Solution
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CHECK THE SOLUTION.
Rate of loss of heat 
Relation between the amount of heat loss by both the spheres in a small time 
is given by
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