A student eats a candy bar that may give 1.8 106 joules of, Ask an Expert

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Q. A student eats a candy bar that can provide 1.8 * 10^6 joules of energy. if the student has a mass of 60 kg, how high will he have a climb a ladder to offset completely the energy contained in the candy bar?

Q. The emissivity of tungsten is approximately 0.35.A tungsten sphere 1cm in radius within a large evacuated enclosure whose walls areat 300k.What power input is required to maintain the sphere at a temperature of 3000k if heat conduction along the support is neglected?

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Category:- Physics
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