The human heart forces 4500 cc of blood per min through the arteries, under a pressure of 15 cm of Hg. Calculate the hp of the heart.
Take 1 hp = 746 W and g = 980 cm/s².

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Solution

Step 1: Given data
The volume of blood pumped per minute is, $V = 4500 c u b i c c e n t i m e t e r = 0.0045 c u b i c m e t e r$
Time is $t = 1 m i n = 60 s e c$
Pressure is, $P = 15 c m H g = 19998.36 P a [1 c m H g = 1333.2239 P a]$

Step 2: Calculating power
Power is given as,
$P o w e r = \frac{P \times V}{t}$
where $P$ is pressure, $V$ is volume and $t$ is time.
Substituting the known values, we get,
$P o w e r = \frac{19998.36 P a \times 0.0045 c u b i c m e t e r}{60 s e c} = 1.499877 W = 2.0 \times 10^{- 3} h p [1 h p = 746 W]$

Therefore, the power of the heart is $2.0 \times 10^{- 3} h p$

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The human heart forces 4500 cc of blood per min through the arteries, under a pressure of 15 cm of Hg. Calculate the hp of the heart.Take 1 hp = 746 W and g = 980 cm/s2.

The human heart forces 4500 cc of blood per min through the arteries, under a pressure of 15 cm of Hg. Calculate the hp of the heart.
Take 1 hp = 746 W and g = 980 cm/s².