A sphere, a cube and a thin circular plate, all made of the same material and having the same mass are initially heated to a temperature of $1000℃$. Which one of these will cool first

Question

Dr. Abubacker · Accepted Answer

(a) Rate of cooling $\frac{\mathrm{\Delta}	heta}{t} = \frac{A\varepsilon\sigma(T^{4} - T_{0}^{4})}{mc} \Rightarrow \frac{\mathrm{\Delta}	heta}{t} \propto A$. Since area of plate is largest so it will cool fastest

Q. A sphere, a cube and a thin circular plate, all made of the same material and having the same mass are initially heated to a temperature of $1000℃$. Which one of these will cool first

Explanation

Reviewed by Dr. Abubacker

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