The human heart forces 4000 cm3 of blood per minutethrough the arterie

1.	The human heart forces 4000 cm3 of blood per minutethrough the arteries under a pressure of 130 mm. Thedensity of blood is 1.03 g em3, What is the horse power ofthe heart?Ans. 1.2x10-4hpl
Answer» Work done by the heart will be given by, W = P.∆ VHere, P is the pressure and ∆ V is the volume of blood being pumped.Now, pressure P = hρgWhere, h = height of mercury column = 130 mm = 0.13 mρ = density of mercury = 13.6 g/cm3 = 13.6 × 103 kg/m3And, g = acceleration due to gravity = 9.8 m/s2Also, ∆ V = 4000 l = 4 × 10–3 m3Where, t = 60 sUsing these values in the equation of power, we get P = 1.15 WThus, the power of heart is 1.15 watt ~ 1.2watt 1 watt= 0.00134 british horsepower why is the colour of the blood red

The human heart forces 4000 cm3 of blood per minutethrough the arteries under a pressure of 130 mm. Thedensity of blood is 1.03 g em3, What is the horse power ofthe heart?Ans. 1.2x10-4hpl

Answer»

Work done by the heart will be given by, W = P.∆ VHere, P is the pressure and ∆ V is the volume of blood being pumped.Now, pressure P = hρgWhere, h = height of mercury column = 130 mm = 0.13 mρ = density of mercury = 13.6 g/cm3 = 13.6 × 103 kg/m3And, g = acceleration due to gravity = 9.8 m/s2Also, ∆ V = 4000 l = 4 × 10–3 m3Where, t = 60 sUsing these values in the equation of power, we get P = 1.15 WThus, the power of heart is 1.15 watt ~ 1.2watt

1 watt= 0.00134 british horsepower

why is the colour of the blood red

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