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प्रश्न
State the energy changes that occur in the following :
Burning coal while operating a steam engine.
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उत्तर
Chemical energy of coal changes to heat energy of the steam. Heat energy changes into mechanical energy.
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संबंधित प्रश्न
State the energy changes in the following case while in use:
An electric iron
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State the energy changes in the following while in use An electric oven.
State the energy changes that occur in the following :
An electric generator (or dynamo).
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in the Charging of a battery.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in the Explosion of crackers.
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. What happens to the mechanical energy after the ball hits the ground and comes to rest?
A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies?
Avinash can run with a speed of 8 m s–1 against the frictional force of 10 N, and Kapil can move with a speed of 3 m s–1 against the frictional force of 25 N. Who is more powerful and why?
State the energy changes in the following case while in use:
A glowing electric bulb
