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प्रश्न
State the energy changes which take place when:
An air gun is loaded and then fired.
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उत्तर
During loading, the mechanical energy changes to the potential energy of spring. On firing, the potential energy of spring changes to the kinetic energy of the bullet.
संबंधित प्रश्न
Select the correct alternatives
The energy stored in an electric cell is
State two uses of solar cells.
State two advantages of using wind energy for generating electricity.
Explain the principle of producing electricity using the nuclear energy.
Show that the quantity 2K/v2 has the unit of mass, where K is the kinetic energy of the body.
Name the form of energy in which potential energy can change.
State two advantages and disadvantages of using nuclear energy for producing electricity.
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
A moving body weighing 400 N possesses 500 J of kinetic energy. Calculate the velocity with which the body is moving. (g = 10 ms2)
Match the pairs.
| Group 'A' | Group 'B' | ||
| (1) | Rolling object | (a) | Heat energy |
| (2) | Food | (b) | Atomic energy |
| (3) | Stretched bow | (c) | Kinetic energy |
| (4) | Sunlight | (d) | Potential energy |
| (5) | Uranium |
(e)
|
Chemical energy
|
