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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
संबंधित प्रश्न
Geothermal energy is produced by the:
(a) fission of radioactive materials
(b) burning of coal inside the coal mines
(c) combustion of natural gas deep inside the earth
(d) fusion of radioactive substances
State two uses of solar cells.
State two disadvantages of producing electricity from solar energy.
State two disadvantages of using wind energy for generating electricity.
What happens to the K.E. when
(i) the mass of the body is doubled at a constant velocity and
(ii) the velocity of the body is doubled at constant mass?
State the energy changes which take place when:
A magnesium ribbon burns in air.
Give one example when:
Heat energy changes to kinetic energy.
Give one example when:
Potential energy changes to electric energy.
Obtain an expression for the kinetic energy of a body of mass m moving with a velocity v?
A body of mass m is taken from a height h to 2h. What is the increase in its potential energy?
