In each heartbeat, a heart pumps 80 mL of blood at an average pressure of 100 mm of Hg . What will the power output of the heart? (Assume 60 heartbeat per minute)

Question

In each heartbeat, a heart pumps 80 mL of blood at an average pressure of 100 mm of Hg . What will the power output of the heart? (Assume 60 heartbeat per minute), 1 W, 2 . 75 W, 1 . 06 W, 0 . 5 W

MARKS App · Accepted Answer

Work done by the heart = PdV dV = (60) x (80 x 10 -6 m 3 ) P = (100 mm of Hg) × 1 . 0 1 × 1 0 5 Pa 7 6 0 mm of Hg = 1 . 33 × 10 4 Pa Power = Work done Time = 1 . 3 3 × 1 0 4 Pa × 6 0 × 8 0 × 1 0 - 6 m 3 6 0 s Power = 1 . 06 W

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