The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 $m m$ of mercury. If the density of mercury is $13.6 \times 10^{3} k g / m^{3}$ and $g = 10 m / s^{2}$ , then the power of heart in Watts is

1.50

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1.70

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2.35

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3.0

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Solution

The correct option is B $1.70$
$ρ = 13.6 \times 10^{3} \frac{k g}{m^{3}}$ , $h = 150 \times 10^{- 3} m$ , $A v = \frac{5 \times 10^{- 3}}{60}$
Power $P = \to F \cdot \to v = P A v = ρ g h \times$ $A v$
$= (13.6 \times 10^{3}) \times 10 \times (150 \times 10^{- 3}) \times (\frac{5 \times 10^{- 3}}{60})$
$= 1.7 W a t t$

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Similar questions

Q. The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be

13.6 \times 10^{3} k g / m^{3}

and

g = 10 m / s^{2}

then the power of heart in watt is:

Q. The heart of a man pumps

5 l i t r e s

of blood through the arteries per minute at a pressure of

150 m m

of mercury. If the density of mercury be

13.6 \times 10^{3} k g / m^{3}

and

g = 10 m / s^{2}

then the power of heart in watt is

The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 $m m$ of mercury. If the density of mercury is $13.6 \times 10^{3} k g / m^{3}$ and $g = 10 m / s^{2}$ , then the power of heart in Watts is

\begin{matrix} The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 m m of mercury. If the density of mercury be 13.6 \times 10^{3} k g / m^{3} and g = 10 m / s^{2} then the power of heart in watt is: \end{matrix}

Q. The heart of a man pumps

4000 c c

of blood through the arteries per minute at a pressure of 130 mm Hg. If the density of mercury is

13.6 \times 10^{3} k g / m^{3}

, what is the power of heart?

(g = 9.8 m / s^{2})

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The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury is 13.6×103 kg/m3 and g=10 m/s2 , then the power of heart in Watts is

The correct option is B 1.70ρ=13.6×103kgm3, h=150×10−3 m, Av=5×10−360 Power P=→F⋅→v=PAv=ρgh× Av =(13.6×103)×10×(150×10−3)×(5×10−360) =1.7Watt

The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 $m m$ of mercury. If the density of mercury is $13.6 \times 10^{3} k g / m^{3}$ and $g = 10 m / s^{2}$ , then the power of heart in Watts is