Against an average pressure of 10 cm of ...

Against an average pressure of 10 cm of mercury, a human heart pumps `50 cm^3` of blood in every beat. If the beat frequency is 72 per minute, what is the power of the heart?

Text Solution

Verified by Experts

The correct Answer is:

0.8W

Topper's Solved these Questions

WORK AND ENERGY
CHHAYA PUBLICATION|Exercise PROBLEM SET -II|47 Videos
WORK AND ENERGY
CHHAYA PUBLICATION|Exercise PROBLEM SET -II (Hots Numerical Problems)|9 Videos
WORK AND ENERGY
CHHAYA PUBLICATION|Exercise EXERCISE (short Answer Type Questions-II)|7 Videos
WBCHSE QUESTION PAPER -2019
CHHAYA PUBLICATION|Exercise SECTION - II ( GROUP -D)|10 Videos

Similar Questions

Explore conceptually related problems

A pump can raise 100 L of water per minute to a height of 10 m . What should be the power of the pump ?

A group of fire brigade personnel carried a right circular cylindrical tank filled with water and pumped out water at a speed of 420 metres per minute to put the fire in 40 minutes by three pipes of 2 cm diameter each. If the diameter of the tank is 2* 8 metres and its length is 6 metre, then calculate (a) what volume of water has been spent in putting out the fire and (b) hte volume of water that still remains in the tank .

When an air bubble rises from the bottom of a sea its volume increases to 4 times its initial value. IF the atmospheric pressure is 76 cmHg and the temperatures at the bottom and the surface of the sea are the same. Then what will be the depth of the sea? Density of mercury= 13.6 g.cm^-3 .

A mercury thermometer contains 0.4cm^(3) of mercury at 0^(@)C. The diameter of the capillary tube of the thermometer is 0.2 mm. What should be the length of the scale to measure temperatures between 0^(@)C " to " 100^(@)C ? The coefficient of apparent expansion of mercury =1.7 times 10^(-4@)C^(-1).

The reading in a barometer changes from 75 cmHg to 25 cmHg when 10 cm^3 of air of atmospheric pressure is introduced in the vaccum space of the barometer tube. What is the volume of air in the tube?

A tuning fork is vibrated together with a length of 100 cm and then with a length of 95 cm, of a stretched sonometer wire. 10 beats are produced per second in each case. Find the frequency of the tuning fork .

CHHAYA PUBLICATION-WORK AND ENERGY-PROBLEM SET -I

A boy of mass 20 kg , moved up to the top of a building of height 18 ...
Text Solution
|
A man of mass 60 kg , climbed 20 steps in 10 s carrying load of 20 kg ...
Text Solution
|
Against an average pressure of 10 cm of mercury, a human heart pumps 5...
Text Solution
|
Time taken by man of weight 580 N to climb up to the top of a towar 8...
Text Solution
|
A pump lifts 5000kg of water per minute through a height of 12m. Find ...
Text Solution
|
An engine can eject 6000 kg of water upwards at 15 m*s^(-1), in 1 min ...
Text Solution
|
The engine of a train has to apply a force of 5000 N to overcome frict...
Text Solution
|
A water pump raises water at a rate of 0.50 m^3// min from a depth of ...
Text Solution
|
A electric motor creates a tension of 4500 N a hoisting cable and reel...
Text Solution
|
A bullet of mass 80 g strikes a target at 100 cm*s^(-1). After penetr...
Text Solution
|
A body of mass 1kg , at a height of 8m above the ground , is thrown v...
Text Solution
|
A body of mass 10 kg is thrown vertically upwards with a velocity of ...
Text Solution
|
Linear momenta of two masses m and 2m are equal. What is the ratio of ...
Text Solution
|
Kinetic energies of two masses m and 2m are equal. What is the ratio ...
Text Solution
|
A bullet of mass m, moving with a velocity u hits a wooden block of ma...
Text Solution
|
A bullet of mass 10 g travels horizontally with a speed of 100 m*s^(-1...
Text Solution
|
A ball is dropped from rest from a height of 10 m. if it loses 20% of ...
Text Solution
|
A pendulum bob of mass 10^(-2) kg is raised to a height of 5xx 10^(-2)...
Text Solution
|
A force of 30 N acts on a body of mass 2.0 kg starting from rest upto ...
Text Solution
|
A body is kept hanging means of a thread of length 1.25 m. if the body...
Text Solution
|