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प्रश्न
Fill in the boxe to show the corresponding energy transformation.
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उत्तर
Chemical energy ⇌ Light energy
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संबंधित प्रश्न
When do we say that work is done?
Name a common device where a gear train is used
A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
What is the work done when the object acted upon by a force remains at rest?
If an electric bulb of 100 watt is lighted for 2 hours, how much electric energy would be consumed?
List any six forms of energy and write a short note on each of them.
A girl of mass 40 kg runs a height of 80 stairs, each 25 cm high with a load of 20 kg on her head in 25 sec. If g is 10 m/s2, find:
(i) Gravitational force acting on the girl.
(ii) Work done by her.
(iii) Useful work done by her.
(iv) Her power in watt.
