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प्रश्न
Fill in the blank
Green plants convert _________ energy into chemical energy.
उत्तर
Green plants convert light energy into chemical energy.
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संबंधित प्रश्न
What are the various energy transformations that occur when you are riding a bicycle?
State the energy changes in the following while in use A loudspeaker .
State the energy changes that occur in the following :
An electric generator (or dynamo).
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in a car going uphill.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in photosynthesis in green leaves.
State the energy changes in the following case while in use:
Burning coal
State the energy changes in the following case while in use:
Bio-gas burner
State the energy changes in the following case while in use:
A petrol engine of a running car
Avinash can run with a speed of 8 m s–1 against the frictional force of 10 N, and Kapil can move with a speed of 3 m s–1 against the frictional force of 25 N. Who is more powerful and why?
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)
