1.

An ideal liquid of density p is pumped steadily through a tube of radius r at a speed v. The least power of engine required to maintain this flow rate is

Answer»

We know that volume rate = Av

Volume rate = πr2v

dm = πr2v\(\rho\)

Power rate = \(\frac12mv^2\)

 = \(\frac12\)πr2v3\(\rho\)



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