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प्रश्न
What should be the characteristic of a source of energy?
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उत्तर
A good source of energy should have the following characteristics:
(i) It should do a large amount of work per unit mass or volume.
(ii) It should have a high calorific value.
(iii) It should be easily accessible over a long period of time.
(iv) It should be economical and easy to store and transport.
(v) It should be safe and convenient to use.
संबंधित प्रश्न
When is work said to be done by a force?
How much energy is gained by a box of mass 20 kg when a man, carrying the box waits for 5 minutes for a bus?
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.
In which of the following case the work done by a force will be maximum : when the angle between the direction of force and direction of motion is 0° or 90°?
State the conditions of equilibrium for a rigid body.
Write an expression for work done by a force depends?
Is power a scalar quantity?
