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Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.PowerEasy2 minPYQ_2020

PhysicsEasysingle choice

In each heartbeat, a heart pumps $80 m l$ of blood at an average pressure of $100 mm$ of $Hg$ . Assuming $60$ heartbeats per second, the power output of the heart is
$(ρ_{H g} = 13.6 \times 10^{3} k g m^{- 3}) (g = 9.8 m s^{- 2})$

Options:

Answer:

Solution:

Work done by the heart $= p d V$

Here, $d V = (60 \times 80 \times 10^{- 6} m^{3})$

$p = (100 m m o f H g) \times \frac{1.01 \times 10^{5} P a}{760 m m o f H g}$

$= 1.33 \times 10^{4} p a$

As, power $= \frac{W o r k d o n e}{T i m e}$

$= \frac{1.33 \times 10^{4} \times 60 \times 80 \times 10^{- 6}}{60}$

$= 1.06 W$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:W.E.P.Subtopic:Power

⏱ 2mℹ️ Source: PYQ_2020

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