1.

The work done by the heart is J J per beat .Calculate the power of the heart if it beats. 72 times in minute.

Answer»

SOLUTION :Given :Number of beats in 1 minute=72
`therefore` Number of beats per second =`(72)/(60)=1.2`
Power of heart =work done per second XX` number of beats in 1 second
`1 J xx 1.2 s^(-1)`
1.2 J `s^(-1)` (or 1.2 W)


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