Advertisements
Advertisements
प्रश्न
What is hydro energy?
Advertisements
उत्तर
The kinetic energy possessed by the flowing water is called the water or hydro energy.
संबंधित प्रश्न
(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.
Write true or false of the following statement.
There is always some loss of energy in conversion from one form of energy to another form, so the total energy is not conserved.
Select the correct alternatives
The energy stored in an electric cell is
State different forms of potential energy and give one example of each.
A light mass and a heavy mass have equal momentum. Which will have more kinetic energy?
(Hint : Kinetic energy K = P2/2m where P is the momentum.)
Show that the quantity 2K/v2 has the unit of mass, where K is the kinetic energy of the body.
What is the main energy transformation that occur in:
Photosynthesis in green leaves.
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)
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
|
What are the small particles that can be seen in a beam of light that enters a dark room?
