Q. If the heart pushes 1 cc of blood in 1 s under pressure 20000 Nm-2, the power of the heart is
1) 0.02 W
2) 400 W
3) 5 × 10-10 W
4) 0.2 W
Answer:
1) 0.02 W
Solution:
Given,
Pressure, P = 20000 Nm-2
Volume per second = 1cc
Power of heart = Pressure x volume per second
= 20000 Nm-2 x 10-6 = 0.02 w
