Question

If the heart pushes $1cc$ of blood in $1s$ under pressure $20000N{m}^2,$ the power of heart is

• A. $0.02W$
• B. $400W$
• C. $5\times 10^{-10}W$
• D. $0.2W$

Answer 1

Answer: (A)

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