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Q.

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

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a

1.2 W

b

1.4 W

c

1.6 W

d

1.8 W

answer is B.

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Detailed Solution

We know that,

Power=work donetime

Power=n(pdv)t

nt=7260

P=125×10-3×13.6×103×9.8×7260×70=1.4W

Hence the correct answer is 1.4 W.

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