The heart of a man pumps 5 liters of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be `13.6xx10^(3) kg//m^(3)` and `g=10 m//s^(2)` then the power of heat in watt is :

Options

A. 1.7
B. 2.35
C. 3
D. 1.5

Answer

a

Explanation

(a) Given, pressure=150mm of Hg
Pumping rate of heart of a man
`=(dV)/(dt)=(5xx10^(-3))/(60)m^(3)//s`
Power of heart `=P.(dV)/(dt)=rhogh.(dV)/(dt)" "[p=rhogh]`
`((13.6xx10^(3)kg//m^(3))(10xx0.15xx5xx10^(-3)))/(60)=1.70W`