A solid copper sphere of density ρ, specific heat c and radius r is at temperature T1. It is suspended inside a chamber whose walls are at temperature 0 K. The time required for the temperature of sphere to drop to T2 is rρcxeσ(1T32−1T31). Find the value of x ?Take the emmissivity of the sphere to be equal to e.

A solid copper sphere of density ρ, specific heat c and radius r is a

1.	A solid copper sphere of density ρ, specific heat c and radius r is at temperature T1. It is suspended inside a chamber whose walls are at temperature 0 K. The time required for the temperature of sphere to drop to T2 is rρcxeσ(1T32−1T31). Find the value of x ?Take the emmissivity of the sphere to be equal to e.
Answer» A solid copper sphere of density $ρ,$ specific heat $c$ and radius $r$ is at temperature $T_{1}$ . It is suspended inside a chamber whose walls are at temperature $0 K$ . The time required for the temperature of sphere to drop to $T_{2}$ is $\frac{r ρ c}{x e σ} (\frac{1}{T_{2}^{3}} - \frac{1}{T_{1}^{3}})$ . Find the value of $x$ ? Take the emmissivity of the sphere to be equal to $e$ .

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