MHT CET Physics question

A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature 120℃, then [MP PET 1992, MP PMT 1996, MP PMT 2000]

(A)Both the cube and the sphere cool down at the same rate
(B)The cube cools down faster than the sphereCorrect
(C)The sphere cools down faster than the cube
(D)Whichever is having more mass will cool down faster

Answer: (B)

Solution

For equal surface area the sphere encloses the larger volume (more mass), and the cooling rate is smaller for it,

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Question ID VK-063575