Question
Solution
The Stefan-Boltzmann constant, is a physical constant involving black body radiation. A black body, also called an ideal radiator, is an object that radiates or absorbs energy with perfect efficiency at all electromagnetic wavelength s.
A man can swim downstream in 12 minutes covering a distance of 600 meters. He takes 15 minutes to cover the same distance upstream. Find the speed of th...
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A boy can swim in water with a speed of 13 km/hr in still water. If the speed of the stream is 5 km/hr, what will be the time taken by the boy to cover ...
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