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प्रश्न
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उत्तर
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संबंधित प्रश्न
(i) The conversion of part of the energy into an undesirable form is called ______________.
(ii) For a given height h, __________________ the length l of the inclined plane, lesser will be the effort required.
A certain form of energy which is not sourced directly or indirectly from the sun and does not cause any pollution is very easily converted into electricity. This form of energy is, however, not available everywhere. Moreover, it is technically very difficult and expensive to obtain it. Name the form of energy.
Select the correct alternatives
A ball rolling on the ground possesses
Give one example to show that the sum of potential energy and kinetic energy remains constant if friction is ignored.
What is meant by the renewable and non-renewable sources of energy? Distinguish between them giving two examples of weach.
What is solar energy?
Write the type of energy possessed in the following case:
A moving cricket ball.
State two advantages and two disadvantages of using hydro-energy for producing electricity.
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
Use your brain power!
How do we save fuel by using public transport?
