The heart does $1.5 J$ of work in each heart beat. How many times per minute does it beat if its power is $2 W$ ?

20

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40

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60

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80

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Solution

The correct option is D $80$
The correct option should be D

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Each time the heart beats it requires 5 J of energy. If it beats 72 times in one minute then the power consumed by the heart is

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