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प्रश्न
What is nuclear energy?
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उत्तर
The energy released/required during disintegration of a nucleus is called nuclear energy.
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संबंधित प्रश्न
Can a body possess energy even when it is not in motion ? Explain your answer with an example.
State whether a solar cell produces a.c. or d.c.
State two advantages of using wind energy for generating electricity.
Is it possible that a body may possess energy even when it is not in motion?
Give three examples of bodies possessing potential energy.
State the energy transformation on the following:
Electricity obtained from hydro energy.
Show that in case of a body falling freely under gravity, total mechanical energy remains conserved (neglect air resistance).
For the same kinetic energy of a body, what should be the change in its velocity if its mass is increased nine times?
A body of mass 50 kg has a momentum of 3000 kg−1 ms. Calculate:
(j) the kinetic energy of the body.
(ii) the velocity of the body.
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)
