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

The heart of a man pumps 5 litre of blood through the arteries per min

1.	The heart of a man pumps 5 litre of blood through the arteries per minute at a pressure of 150 mm of mercury.If the density of mercury be 13.6 xx10^(3) kg//m^(3)and g = 10 m//s^(2) then the power of heart in watt is :
Answer» <P>`1.50` `1.70` `2.35` `3.00` Solution :Pumping of blood `(dv)/(dt) = (5mm)/(MM) =(5xx10^(-3))/60 (m^(3))/S` Pressure P = 150 mm of Hg `RARR H = 150 xx10^(-3) m ` Power of heart ` = P (dv)/(dt)` ` = rho gh (dv)/(dt)` ` = 13.6 xx10^(3) xx10 xx150 xx10^(-3) xx (5xx10^(-3))/60` Power of heart` = 1700 xx 10^(-3) = 1.70 `WATT = 1.70 W