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A solid copper sphere of dimater 10mm is...

A solid copper sphere of dimater `10mm` is cooled to temperature of `150K` and is then placed in an enclousure at `290K` Assuming that all interchange of heat is by radiation, calculate the initial rate of rise of temperature of the sphere The sphere may be treated as a black body `rho_(copper) =8.93xx 10^(3)kg//m^(3)`
`s = 3.7xx10^(2) Jkg^(-2) K^(-1) , sigma = 5.7 xx 10^(8) Wm^(-2) K^(-4)` .

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