a human heart pumps 50cc of blood per heart beat at a pressure of 1.5 m of water if the heart beat are 75 per minute then the average pumping power of the heart
Answers
The pumping power of the heart is 12.50 W
Explanation:
Work = Force × Distance
Work = ( Pressure × Area ) × Distance
Rearranging we get
Work = Pressure × Volume ......(1)
Power = Work / Time
Using equation (1) we get
Power = Pressure × Volume / Time
Power = h ρ g × Volume / t
where
- h is height of mercury
- ρ = 13593 k g m − 3 is density of mercury
- g is acceleration due to gravity = 9.81 m s − 2
Power = 1.5 x 13596 × 9.81 ( 50 / 100^3 x 75) / 60
Power = 200,065.14 x (0.00005 x 75) / 60
Power = 200,065.14 x 0.00375 / 60
Power = 750.24 / 60
Power = 12.50 W
Hence the pumping power of the heart is 12.50 W
Also learn more
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 13.6×103kg/m3 and g=10m/s2, then the power of heart in watt is ?
https://brainly.in/question/8263044
Answer:
0.9375
Explanation:
P = ¶gh
= 10^3×10×1.5
=15×10^3pa
Work = PV=15×10^3×50×10^6
= 75×10^-2
Power = work/ min ÷ Time
= 75×75×10^-2 ÷ 60
= 0.9375