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Two spheres of same radius R have their densities in the ratio 1 8 and...

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Two spheres of same radius R have their densities in the ratio 1 8 and the ratio of their specific heats are 4 1 and ratio of their emisivity are 24 1 Both sphere are placed in same environment and initial temprature of both sphere are same then find the initial ratio of rate of cooling of sphere

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