Download the app

Questions  

Human heart pumps 70 cc of blood at each beat against a pressure of 125 mm of Hg. If the pulse frequency is 72 per minute, the power of the heart is nearly

Remember concepts with our Masterclasses.

80k Users
60 mins Expert Faculty Ask Questions
a

1.2W

b

1.4W

c

1.6W

d

1.8W

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is A

p = pressure against which heart is pumping blood = p.g.h = 13.6 x 103 x 10 x 125 x 10-3 N/m2 ⇒17,000 N/m2.
If A be the effective area of flow of blood, then resistive force F = p.A. If v be the average velocity of flow of blood, then power = Fv = pAv = p x (Av) = p x Q
= 17 x 103 x 70 x 10-6W = 1.2W

Talk to our academic expert!

+91

Are you a Sri Chaitanya student?

ctaimg

Create Your Own Test
Your Topic, Your Difficulty, Your Pace



Practice More Questions

Easy Questions

Moderate Questions

Difficult Questions


Download the app

phone icon
whats app icon