Engineering, 27.03.2020 05:33 valensanta2005
Stainless steel ball bearings (r 5 8085 kg/m3 and cp 5 0.480 kJ/kg·°C) having a diameter of 1.2 cm are to be quenched in water at a rate of 800 per minute. The balls leave the oven at a uniform temperature of 900°C and are exposed to air at 25°C for a while before they are dropped into the water. If the temperature of the balls drops to 850°C prior to quenching, determine the rate of heat transfer from the balls to the air.
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Stainless steel ball bearings (r 5 8085 kg/m3 and cp 5 0.480 kJ/kg·°C) having a diameter of 1.2 cm a...
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