A solid sphere of copper of radius R and hollow sphere of copper of inner radius r and outer radius R are heated to the same temperature and allowed to cool in the same environment. The rate of cooling is

A solid sphere of copper of radius R and hollow sphere of copper of in

1.	A solid sphere of copper of radius R and hollow sphere of copper of inner radius r and outer radius R are heated to the same temperature and allowed to cool in the same environment. The rate of cooling is
Answer» more for HOLLOW sphere more for SOLID sphere same for both the sphere can not say Solution :`( d theta)/(dt)=(KA)/(mc)(theta-theta_(0))and M_(h) LT M_(s)`

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A solid sphere of copper of radius R and hollow sphere of copper of inner radius r and outer radius R are heated to the same temperature and allowed to cool in the same environment. The rate of cooling is

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