A hot metallic sphere of radius \[r\] radiates heat. It's rate of cool – McqOptions

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1.	A hot metallic sphere of radius \[r\] radiates heat. It's rate of cooling is
A.	Independent of \[r\]
B.	Proportional to \[r\]
C.	Proportional to \[{{r}^{2}}\]
D.	Proportional to \[1/r\]
Answer» E.

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