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प्रश्न
State the energy changes which take place when:
In a heat engine.
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उत्तर
The heat energy changes to mechanical energy.
संबंधित प्रश्न
Give one example of a body that has potential energy, due to its position at a height.
Give one disadvantage of using a solar cell.
State two advantages of producing electricity from solar energy.
State two disadvantages of using wind energy for generating electricity.
Name two examples in which the mechanical energy of a system remains constant.
Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.
State the energy changes which take place when:
A bulb glows, when torchlight is switched on.
State the energy changes which take place when:
A car moves up a hill.
A body of mass m is taken from a height h to 2h. What is the increase in its potential energy?
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A compressed spring
