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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
Name a common device where a gear train is used
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
If the work done by a force in moving an object through a distance of 20 cm is 24.2 J, what is the magnitude of the force?
What happens to the work done when the dispacement of body is at right angles to the direction of force acting on it? Explain your answer.
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
List any six forms of energy and write a short note on each of them.
How long should an electric motor, of power 2 H.P. operate, so as to pump 5 m3 of water from a depth of 15m. [Take g = 10 N kg−1]
Work done by this force at any instant is ______.
