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प्रश्न
Give an example
Chemical energy changes to heat energy.
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उत्तर
Candle flame
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संबंधित प्रश्न
What are the quantities on which the amount of work done depends? How are they related to work?
Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
Give two examples of work done.
Write an expression for the work done against gravity.
An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate
(i) the amount of work done, (ii) the power of the machine.
Why is less effort needed to lift a load over an inclined plane as compared to lifting the load directly?
State larger units of power.
What should be the characteristic of a source of energy?
