1.A liquid of density ρ\rhoρ flows steadily through a tube of radius rrr at speed vvv. The least power of the engine to maintain this rate of flow isa.ρπr2v2\dfrac{\rho \pi r^2 v}{2}2ρπr2vb.2ρπr2v2π\dfrac{2\rho \pi r^2 v^2}{\pi}π2ρπr2v2c.12ρπr2v3\dfrac{1}{2}\rho \pi r^2 v^321ρπr2v3d.2ρπr2v2\rho \pi r^2 v2ρπr2vLogin to continueOnly logged in users canattempt or see the solution.
