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प्रश्न
Fill in the blank
Green plants convert _________ energy into chemical energy.
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उत्तर
Green plants convert light energy into chemical energy.
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संबंधित प्रश्न
State the energy changes that occur in the following :
The unwinding of a watch spring.
State the energy changes that occur in the following :
Burning coal while operating a steam engine.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in the Explosion of crackers.
State the energy changes in the following case while in use:
Microphone
State the energy changes in the following case while in use:
A petrol engine of a running car
Explain conservation of energy.
Can any object have momentum even if its mechanical energy is zero? Explain
Is it possible that an object is in a state of accelerated motion due to external force acting on it, but no work is being done by the force? Explain it with an example.
Four men lift a 250 kg box to a height of 1 m and hold it without raising or lowering it.
(a) How much work is done by the men in lifting the box?
(b) How much work do they do in just holding it?
(c) Why do they get tired while holding it? (g = 10 m s–2)
The energy conversion in a washing machine is from ______.
