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प्रश्न
State four ways for the judicious use of energy.
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उत्तर
Four ways for the judicious use of energy:
(a) The fossil fuels such as coal, petroleum, natural gas should be used only for the limited purposes when there is no other alternative source of energy available.
(b) The wastage of energy should be avoided.
(c) Efforts must be made to make use of energy for community or group purposes.
(d) The cutting of trees must be banned and more and more new trees must be roped to grow.
संबंधित प्रश्न
State two advantages of geothermal energy.
Give one example of a body that has potential energy, due to its position at a height.
A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is just in the middle .
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A piece of stone placed on the roof.
Name two examples in which the mechanical energy of a system remains constant.
Two bodies A and B of masses m and M (M ≫ m) have same kinetic energy. Which body will have more momentum?
Give three examples of bodies possessing kinetic energy.
State the energy changes which take place when:
Photographic film is exposed to sunlight.
Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.
