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September 20, 2014

Homework Help: Physics

Posted by Edwin on Sunday, March 14, 2010 at 5:29am.

Two spheres S1 and S2 of the same metal and having the same type of surface, have radii 20cm and 10cm respectively. Compare their rates of fall of temperature as they cool (a) when S1 is at 50 degree centigrade, S2 is at 40 degree centigrade, the surroundings are at 20 degree centigrade and Newton's law applies (b) when S1 is at 400 degree centigrade, S2 at 300 degree centigrade the surroundings are at 200 degree centigrade and stefan's law applies.

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