EXAMIANS
Heat is transferred by all three modes of transfer, viz. conduction, convection and radiation in
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Unit of thermal conductivity in S.I. units is
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The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as
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Thermal conductivity of air with rise in temperature
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According to Stefan's law, the total radiation from a black body per second per unit area is proportional to
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Sensible heat is the heat required to
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Depending on the radiating properties, a body will be black when(Where a = absorptivity, p = reflectivity, X = transmissivity.)
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The heat of sun reaches to us according to
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A designer chooses the values of fluid flow rates and specific heats in such a manner that the heat capacities of the two fluids are equal. A hot fluid enters the counter flow heat exchanger at 100°C and leaves at 60°C. A cold fluid enters the heat exchanger at 40°C. The mean temperature difference between the two fluids is
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A steam pipe is to be insulated by two insulating materials put over each other. For best results
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