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प्रश्न
Write five forms of energy.
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उत्तर
(i) Mechanical energy
(ii) Chemical energy
(iii) Solar energy
(iv) Heat energy
(v) Light energy.
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.
Give one example of a body that has potential energy, in due to its state.
Give one relevant example for the following transformation of energy:
Electrical energy to heat energy.
Name the physical quantity measured in terms of horse power.
A body of mass m is moving with a velocity v. Write the expression for its kinetic energy.
A ball of mass 0.5 kg slows down from a speed of 5m/s-1 to that of 3m/s-1. Calculate the change in kinetic energy of the ball.
State the energy changes which take place when:
Water stored in dams rotates turbine connected to a dynamo.
A body of mass m is taken from a height h to 2h. What is the increase in its potential energy?
In a hydroelectric power station, 1000 kg of water is allowed to drop through a height of 100 m in 1 sec. If the conversion of potential energy to electric energy is 60%. Calculate the power output. [Take: g = 10m/sec2]
What is the difference between the solid, liquid, and gaseous states of a substance?
