Question

The heart does 1.5 J of work in every beat . How many times per minute does it beat if it's power is 2 w

Answer 1

Answer:

here is the answer

Explanation:

80 times per minute

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 watt? Therefore, the heart beats 80 times per minute.

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Answer 2

Work done = 1.5 J/beat

Power = 2 W or 2 J/s

Time taken = 1 min or 60 s

Let the number of times the heart beated in 60 s be = (x) beats

∵ W = P · t ⇒ 1.5x = 2 × 60 ⇒ 3/2 x = 120

⇒ x = 120 × ⅔ ⇒ x = 80 beats.

∴ The heart beats 80 times per minute.