Advertisements
Advertisements
प्रश्न
Does the transfer of energy take place when you push a huge rock with all your might and fail to move it? Where is the energy you spend going?
Advertisements
उत्तर
- No, when we push a huge rock with all our strength but cannot move it, there is no transfer of energy.
- When we push the rock, our muscles tense and blood is displaced very rapidly to these muscles.
- These changes consume energy and we feel tired.
संबंधित प्रश्न
What kind of energy is possessed by the following?
A stone kept on roof-top _______________
What kind of energy is possessed by the following?
Water stored in the reservoir of a dam __________.
Give two examples where a body possesses both, kinetic energy as well as potential energy.
Name the device or machine which convert :
Electrical energy into sound energy.
Name the device or machine which convert :
Chemical energy into kinetic energy (or mechanical energy).
Name the device or machine which convert :
Chemical energy into heat energy.
Name the device or machine which convert :
light energy into heat energy.
Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.
Write the energy transformations which take place in an electric bulb (or electric lamp).
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g = 10 m s–2)
