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The quantities of heat required to raise the temperature of two solid copper spheres of radii r1 and r2 (r1 = 1.5 r2 ) through 1 K are in the ratio :

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The quantities of heat required to raise the temperature of two solid copper spheres of radii r1 and r2 (r1 = 1.5 r2 ) through 1 K are in the ratio :

1) 9 / 3
2) 3 / 2
3) 27 / 8
4) 5 / 3

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