Saturday 19 May 2012

Wat is the power developed by ur heart...???

Ask it....
if it doesnt answer have patience to read this fully........!


"Under normal conditions, the heart beats 75 times per minute, delivering about 5 liters per minute, but its flow can be five times greater under extreme conditions.
The peak blood pressure in the heart is about one-sixth of an atmosphere, and the heart develops about 1.5 to 2 watts of mechanical power.
"

The human heart is a powerful and extremely reliable pump. Each day it takes in and discharges about 7500 L of blood.

Assume that the work done by the heart is equal to the work required to lift this amount of blood a height equal to that of the average American female (1.63 m).


The density (mass per unit volume) of blood is 1.054g/m^3.
7,500L / (1,000L/1m^3)= 7.5m^3


Mass = density x volume Mass = 1.05g/m^3 (7.5m^3) = 7.875g

1)
*Work done by heart* W = Fd = mgd = (7.875g)(9.8m/s^3)(1.63m)
...W = 125.79525J

2)
*Power developed* (125.79525J/day) / (86,400s/day) = 1.456 watts


So now u know the power of ur heart, but u cant use it as a battery:-) lolz

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