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प्रश्न
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उत्तर
When the head of a nail is struck with a hammer, the mechanical energy of the hammer pushes the nail into the plank of wood and in this process a part of energy is converted into heat energy.
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संबंधित प्रश्न
What is geothermal energy?
State the energy changes in the following case while in use:
an electric bulb
State two characteristic which a source of energy must have.
What is tidal? Explain in brief.
Explain the principle of generating electricity from hydro energy.
What kind of energy is possessed in a situation when?
Water stored in dams.
Name the two groups in which various sources of energy are classified?
Give one example when:
Potential energy changes to electric energy.
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)
What are the small particles that can be seen in a beam of light that enters a dark room?
