Two balls of same material and finish have their diameters in the ratio of 2 : 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of____________________?

Mechanical Engineering Mcqs

Two balls of same material and finish have their diameters in the ratio of 2 : 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of____________________?

(A)  1 :1

(B)  2: 1

(C)  1 : 2

(D)  4 : 1

(E)  1 : 4

Submitted By :Ali Uppal

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