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# For a very rough pipe wall the friction factor is constant at high reynolds numbers. for a length l1 the pressure drop over the length is p1. if the length of the pipe is then doubled, what is the relation of the new pressure drop p2 to the original pressure drop p1 at the original mass flow rate?   ### Another question on Physics Physics, 31.01.2019 19:54
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For a very rough pipe wall the friction factor is constant at high reynolds numbers. for a length l1...
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