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प्रश्न
State the energy changes which take place when:
Food is digested by animals.
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उत्तर
The chemical energy changes into heat energy.
संबंधित प्रश्न
A boy of mass m climbs up a staircase of vertical height h.
(a) What is the work done by the boy against the force of gravity?
(b) What would have been the work done if he uses a lift in climbing the same vertical height?
State different forms of potential energy and give one example of each.
State two disadvantages of producing electricity from solar energy.
What is wind energy?
Name the energy changes for the following:
bicycle brakes
What do you understand by mechanical energy?
Write the type of energy possessed in the following case:
A wound-up spring
Give one example when:
Mechanical energy changes to electric energy.
In which states is water found in nature?
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A compressed spring
