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प्रश्न
Give one example when:
Heat energy changes to kinetic energy.
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उत्तर
In the automobile engine, heat energy changes to kinetic energy.
संबंधित प्रश्न
Explain how, geothermal energy is used to generate electricity.
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.
Can a body possess energy even when it is not in motion ? Explain your answer with an example.
Give one example to show the conversion of potential energy to kinetic energy when put in use.
State two uses of solar cells.
The following are some of the energy transformations.
A. Electrical to light
B. Work to heat
C. Chemical to light
D. Electrical to sound
E. Mechanical to electrical
Identify the energy transformation that takes place in the following by inserting the corresponding letter in the shape provided.
(i) A candle flame
(ii) A torch is lighted
(iii) A microphone is used in a meeting
(iv) A cycle dynamo
(v) A piece of metal is being filed
Is it possible that a body may possess energy even when it is not in motion?
State the energy changes which take place when:
A toy car spring is wound and car is made to run on level floor.
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)
For the same kinetic energy of a body, what should be the change in its velocity if its mass is increased nine times?
