The power of a heart which pumps `5 xx 10^(3) cc` of blood per minute at a pressure of `120 mm` of meteury `(g = 10 ms^(-2)` and density of `Hg = 13.6 xx 10^(3) km^(3))` is

Options

A. `1.50`
B. `1.70`
C. `2.35`
D. `3.0`

Explanation

Pressure `= 150 mm Hg`
Pumping rate `= (dV)/(dt) = (5 xx 10^(-3))/(60) m^(3)//s`
Power of heart `P. (dV)/(dt) = rho gh xx (dV)/(dt)`
`= (13.6 xx 10^(3) kg//m^(3)) (10) xx (0.15) xx (5 xx 10^(-3))/(60)`
`= (13.6 xx 5 xx 0.15)/(6) = 1.70` watt.