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please explain every step 21 Nitrogen at 2atm and 500K flows across a 40cm-square plate at a velocity of 25m/s. Calculate the cooling required to

please explain every step

21 Nitrogen at 2atm and 500K flows across a 40cm-square plate at a velocity of 25m/s. Calculate the cooling required to maintain the plate surface at a constant temperature of 300K

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