Answer:
P =1.26 W
Explanation:
number of heart beats =80 beats per minute
or, n=80(beat/60 s) = 1.33 beats /sec
volume of the blood V =68 cm^3 =[tex]68\times10^{-6}m[/tex]
average pressure p =105 mm-Hg =110×133 [tex]N/m^2[/tex]
(since 1 mm-Hg =133 N/m^2)
power out put is P =nW ........ (1)
where n =heart rate
work done in each heart beat is W = =pAd =pV
therefore W =pV ....... (2)
from eq (1) and (2),
P =nPV =((80/60)beats/s)(105×133 N/m^2)(68×10^{-6}m^3)
power out put P =1.26 W
