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Physics - Fluid Question with Solution | TestHub

PhysicsFluidBernoulli's theorem and applicationsEasy2 minPYQ_2015

PhysicsEasysingle choice

The heart of a man pumps $5$ litres of blood through the arteries per minute at a pressure of $150 mm$ of mercury. If the density of mercury be $13.6 \times 10^{3} k g m^{- 3}$ and $g = 10 m s^{- 2}$ , then the power of heart in watt is:NEET 2015 (Phase 2)

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Solution:

$Pressure = P = 150 mm Hg Pumping rate = \frac{dV}{dt} = \frac{5 \times 1 0 ^{- 3}}{60} m^{3} / s Power of heart = P. \frac{dV}{dt} = ρ gh \times \frac{dV}{dt} = (13.6 \times 1 0^{3}) (10) \times (0.15) \times \frac{5 \times 1 0 ^{- 3}}{60} = \frac{13.6 \times 5 \times 0.15}{6} = 1.70 watt$

Stream:NEETSubject:PhysicsTopic:FluidSubtopic:Bernoulli's theorem and applications

⏱ 2mℹ️ Source: PYQ_2015

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