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  4. If the heart pushes 1 cc of blood in 1 s under pressure 20000 Nm2, the power of heart is

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Q. If the heart pushes $ 1\,cc $ of blood in $1 \,s$ under pressure $ 20000\,Nm^{2}, $ the power of heart is

J & K CETJ & K CET 2005

Solution:

We know that $P$ ower $=$ pressure $\times$ volume per second
Given, pressure $=20,000 \,Nm ^{2}$
volume $=1 \,c c=10^{-6} m ^{3}$
$\therefore $ power $=20,000 \times 10^{-6}$
$P=0.02 \,W$