Advertisements
Advertisements
प्रश्न
The work done by the heart is 1 Joule per beat. Calculate the power of the heart if it beats 72 times in one.
The heart does a work of 1 J per beat. If the heart beats 72 times in a minute, what will be its power?
Advertisements
उत्तर
Total work done by the heart in one minute (i.e. 60 s.) is 72 beats or 72 joules.
∴ Power of heart = `("W(in Joules)")/("Time(in s)")`
= `72/60"watts"`
= 1.2 watts
APPEARS IN
संबंधित प्रश्न
Explain by an example that a body may possess energy even when it is not in motion.
No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.
What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
State the energy changes which take place when Water stored in the dam is used to turn turbine in dynamo.
Give an example
Chemical energy changes to electrical energy.
Give an example
Light energy changes to electrical energy.
A coolie, with a load of 30 kg on his head, walks on the platform. If he walks a distance of 60 m, what is the work done by him?
A body of mass 0.5 kg travels on straight line path with velocity v = (3x2 + 4) m/s. The net work done by the force during its displacement from x = 0 tox = 2 m is ______.
