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प्रश्न
Give one relevant example for the following transformation of energy :
Chemical energy to light energy.
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उत्तर
Fire crackers burst
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संबंधित प्रश्न
Which of the following produces more heat (per unit mass) on burning?
Fill in the blank
Energy possessed by a compressed spring is ______ energy.
What is the main source of energy for earth?
State two uses of solar cells.
Give one disadvantage of using a solar cell.
How is kinetic energy possessed by a moving body measured?
Write the type of energy possessed in the following case:
A wound-up spring
State the energy changes which take place when:
A toy car spring is wound and car is made to run on level floor.
State the energy changes which take place when:
Water freezes in the freezing chamber of a fridge.
A ball of mass 50 g falls from a height of 2m and rebounds from the ground to 1.6 m. Find:
(i) The potential energy possessed by the ball when initially at rest.
(ii) The kinetic energy of the ball before it hits the ground.
(iii) The final potential energy of the ball.
(iv) The loss in kinetic energy of the ball on collision. (Take: g = 10N kg−1)
