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प्रश्न
Select the correct alternatives
When we rub our hands
पर्याय
kinetic energy changes into potential energy
mechanical energy changes into heat energy
potential energy changes into kinetic energy
heat energy changes into mechanical energy.
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उत्तर
mechanical energy changes into heat energy
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संबंधित प्रश्न
Write true or false of the following statement.
A gum bottle lying on a table has no energy.
Write true or false of the following statement.
Potential energy changes into kinetic energy when it is put to use
What is potential energy ? State its unit.
Name two units of power bigger than watt.
Define the term 'watt'.
- Take two aluminium channels of different lengths.
- Place the lower ends of the channels on the floor and hold their upper ends at the same height.
- Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.
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- As the balls roll down which energy is converted into which other form of energy?
- Why do the balls cover the same distance on rolling down?
Note: The question is wrong. It should be "Why do the balls cover the same distance after rolling down"? - What is the form of the eventual total energy of the balls?
- Which law related to energy does the above activity demonstrate? Explain.
Can you tell?
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Running water possesses ______.
Find out the form of energy possessed by the following thing.
A rock on the top of a hill
What energy transfer happen in a car engine?
