Given, heart pumps blood in volume per minutes,
AV=5L∕min AV=m3∕s
Here as shown in figure, area of arteries is
A and velocity of blood is
v. Thus, the volume flows per second inside arteries is given by
(A.v).
Height of mercury, column,
hHg=150mm =150×10−3m Density of mercury,
ρHg=13.6×103kg∕m3 and
g=10m∕s2 Power (in watt) = ?
In this case, we find instantaneous power, P
=F.v .........(i)
Since,
F=pressure×area and pressure
=hHg.ρHg.g Put these values in eq. (i), we get
P=hHg.ρHg.g.(A.v) ........(ii)
=150×10−3×103×10× =×10−3 =1700×10−3=1.70W