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प्रश्न
Give one example when:
Kinetic energy changes to heat energy.
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उत्तर
When two stones are rubbed against each other, kinetic energy changes to heat energy.
संबंधित प्रश्न
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
Which of the following produces more heat (per unit mass) on burning?
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A compressed spring
Name five renewable sources of energy.
What is wind energy?
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s−2).
What kind of energy is possessed in a situation when?
A stone, in a stretched catapult.
Write the type of energy possessed in the following case:
A bent bow
State the energy changes which take place when:
A body thrown vertically upwards from the ground.
State the energy transformation on the following:
Electricity obtained from hydro energy.
