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प्रश्न
What is hydro energy?
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उत्तर
The kinetic energy possessed by the flowing water is called the water or hydro energy.
संबंधित प्रश्न
State the energy change in the following device while in use:
A loudspeaker
Define calorific value of a fuel.
Name the type of energy (kinetic or potential) possessed by the following:
A moving bus.
A boy of mass m climbs up a staircase of vertical height h.
(a) What is the work done by the boy against the force of gravity?
(b) What would have been the work done if he uses a lift in climbing the same vertical height?
What is the main source of energy for earth?
Give one disadvantage of using a solar cell.
Obtain an expression for the potential energy of a body of mass m at a height h above the ground.
State the energy changes which take place when:
Food is digested by animals.
Give one example when:
Light energy changes to chemical energy.
A girl of mass 35 kg climbs up from the first floor of a building at a height 4 m above the ground to the third floor at a height 12 m above the ground. What will be the increase in her gravitational potential energy? [g = 10 ms-2]
