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प्रश्न
Write five forms of energy.
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उत्तर
(i) Mechanical energy
(ii) Chemical energy
(iii) Solar energy
(iv) Heat energy
(v) Light energy.
संबंधित प्रश्न
State the energy change in the following device while in use:
A loudspeaker
(i) The conversion of part of the energy into an undesirable form is called ______________.
(ii) For a given height h, __________________ the length l of the inclined plane, lesser will be the effort required.
State two advantages of producing electricity from solar energy.
What is nuclear energy?
What kind of energy is possessed in a situation when?
A horse running along a level road
Name the two groups in which various sources of energy are classified?
A ball of mass 200 g falls from a height of 5 m. What will be its kinetic energy when it just reaches the ground? (g = 9.8 m s−2)
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)
You might have seen some beautiful fireworks during Diwali. It is an example of the transformation of ______ energy into ______ energy.
The solar cooker is an application of the ______ energy of the sun, while solar cells, solar lamps are applications of the ______ energy of the sun.
