The human heart forces `4000cm^(3)` of blood per minute through the arteries under pressure of `130mm` . The density of blood is `1.03g//c c`. What is the horse power of the heart ?

Explanation

Here, `V=4000c.c, t=1 min.=60s`
Pressure, `P=hrho g=130xx10^(-1)xx1.03xx980 "dyne"//cm^(2)`
`"Power" = ("work")/("time")=(PxxV)/(t)`
(13xx1.03xx980xx4000)/(60)erg//sec.`
`=218.7xx4xx10^(-4)"watt"`
`=(218.7xx4xx10^(-4))/(746)=1.17xx10^(-4)`