EXAMIANS
Reynold's analogy states that
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When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids?
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In Joule's experiment, an insulated container contains 20 kg of water initially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms⁻². Neglecting the heat capacity of agitator, the temperature of water (in °C) is
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Prandtl number is the reciprocal of
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A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when
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Boiling point elevation of a solution of NaOH
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Thermal conductivities of most of the liquids __________ with rise in temperature.
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The sum of reflectivity and absorptivity for an opaque body is equal to
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Prandtl and Reynold's analogies are identical for Prandtl number value of
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A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is
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