Home
Class 12
PHYSICS
The heart of a man pumps 5L of blood thr...

The heart of a man pumps 5L of blood through the artries per minute at a pressure of 150mm of mercury. If the density of mercury be `13.6xx10^(3)"Kg"//m^(3)` and `g=10m//s^(2)` , then the power of heart in watt is

A

1.5

B

1.7

C

2.35

D

3

Text Solution

Verified by Experts

The correct Answer is:
B
`P=(W)/(t)=(mgh)/(t)=(V)/(t)rhogh`
`=(5xx10^(-3))/(60)xx13.6xx10^(3)xx10xx150xx10^(-3)`
`=(5xx13.6xx150)/(6)xx10^(-3)`
`=1700xx10^(-3)`
P=1.7 watt
Promotional Banner

Similar Questions

Explore conceptually related problems

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 13.6xx10^(3) kg//m^(3) and g=10 m//s^(2) then the power of heat in watt is :

The average human heart forces four litre of blood per minute through arteries a pressure of 125 mm. If the density of blood is 1.03xx10^(3)kg//m^(3) then the power of heart is :

Convert 1 mm of Hg into pascal. Take density of Hg=13.6xx10^(3)kg m^(-3) and g=9.8 ms^(-2) .

Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 "g cm"^(-3)

A human heart pumps 50 cc of blood per heart besat at a pressure of 1.5 m of water. If the heart beats are 75 per minute then average pumping power of heart ( g = 10 m/s^2 )

The column of mercury in a barometer is 76mm of Hg. Calculate the atmospheric pressure if the density of mercury = 13600kgm −3 . (Take g=10ms −2 )

The pressure at a point in water is 10 N//m^(2) . The depth below this point where the pressure becomes double is (Given density of water = 10^(3) kg m^(-3) , g = 10 m s^(-2) )

Water rises to a height of 9cm in a certain capillary tube. In the same tube the level of mercury surface is depressed by 3 cm . Compute the ratio of surface tension of water and mercury . Density of mercury 13.6 xx 10^(3) kg m^(-3) . Angle of contact of water is zero and that for mercury is 135^(@) .

A capillary tube of the radius 0.5 mm is immersed in a beaker of mercury . The level inside the tube is 0.8 cm below the level in beaker and angle of contact is 120^@ . What is the surface tension of mercury , if the mass density of mercury is rho= 13.6 xx 10^3 kg m^3 and acceleration due to gravity is g = 10 m s^(-2) ?

The power of a motor pump is 2kW. How much water per minute the pump can raise to a heiht of 10 m ? (Given g = 10 m//s^2)