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Standard XII

Physics

Equation of Continuity

The heart of ...

Question

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:

1.5

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1.7

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2.35

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Solution

The correct option is B 1.7
Power: $P = \to F \cdot \to v = P A v = ρ g h \times (v o l u m e / s e c) = (13.6 \times 10^{3}) \times 10 \times (150 \times 10^{- 3}) \times (\frac{5 \times 10^{- 3}}{60}) = 1.7 W a t t$

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Similar questions

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

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

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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 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

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})

Q. The heart of a man pumps 5 liters of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be 13.6×10^3 kg/m^3 and g=10 m/s^2. Then the power of heart watt is 1) 1.50 2) 1.70 3) 2.35 4) 3.0

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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 be 13.6×103kg/m3 and g=10m/s2 then the power of heart in watt is:

The correct option is B 1.7Power: P=→F⋅→v=PAv=ρgh×(volume/sec)=(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 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:

The correct option is B 1.7
Power: $P = \to F \cdot \to v = P A v = ρ g h \times (v o l u m e / s e c) = (13.6 \times 10^{3}) \times 10 \times (150 \times 10^{- 3}) \times (\frac{5 \times 10^{- 3}}{60}) = 1.7 W a t t$