A solid aluminium sphere and a solid copper sphere of twice the radius are heated to the same
Channel: Doubtnut
Date: 12/07/2020

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 identical surrounding temperatures. Assume that the emisssivity of both the spheres is the same. Find ratio of (a) the rate of heat loss from the aluminium sphere to the rate of all of temperature of tghe copper sphere. The specific heat copacity of aluminium `=900Jkg^(-1)`^(@)C^(-1)` . and that of copper `=390Jkg^(-1)`^(@)C^(-1)` . The denity of copper `=3.4` times the correct wattage.