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प्रश्न
State the energy changes which take place when:
Photographic film is exposed to sunlight.
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उत्तर
The light energy changes to chemical energy
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संबंधित प्रश्न
Which of the following produces more heat (per unit mass) on burning?
What name is given to the heat energy obtained from hot rocks inside the earth?
Two toy-cars A and B of masses 500 g and 200 g respectively are moving with the same speed. Which of the two has the greater kinetic energy?
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?
What is geo thermal energy? Explain in brief.
A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5m above the ground.
What the kinetic energy of the ball just before it hits the ground ?
State the energy changes which take place when:
In a heat engine.
Give one example when:
Kinetic energy changes to heat energy.
Give one example when:
Sound energy changes to electric energy.
A good fuel should possess:
