Distance from entrance where velocity-thermal layers meet
Water at 20 degrees Celsius is flowing with velocity of 0.5 m/s between two parallel flat plates placed 1 cm apart. Determine the distances from the entrance at which the velocity and thermal boundary layers meet.
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Determine the water convection heat transfer coefficient and the water temperature gradient at the upper plate surface.
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Suppose that the microwave radiation has a wavelength of 12.4cm . How many photons are required to heat 235 mL of coffee from 25.0 C to 62.0 C?
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