Q. If the heart pushes 1 cc of blocked in one second under pressure $20000\ N/m^{2}$ the power of heart is
A) $0.02\ W$
B) $400\ W$
C) $5 \times 10^{- 10}\ W$
D) $0.2\ W$
Explanation
(a) Power $= \frac{workdone}{time} = \frac{pressure \times cnahge\ in\ volume}{time}$
$= \frac{20000 \times 1 \times 10^{- 6}}{1} = 2 \times 10^{- 2} = 0.02\ W$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.