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प्रश्न
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.
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उत्तर
Chemical energy changes into heat, light and sound energy.
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संबंधित प्रश्न
State the energy changes in the following while using a microphone.
Fill in the blank
Green plants convert _________ energy into chemical energy.
State the energy changes that occur in the following :
The unwinding of a watch spring.
State the energy changes in the following case while in use:
Microphone
State the energy changes in the following case while in use:
An electromagnet.
Law of conversation of energy given by ______.
Choose the odd one:
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?
A boy is moving on a straight road against a frictional force of 5 N. After travelling a distance of 1.5 km he forgot the correct path at a roundabout (Fig. 11.1) of radius 100 m. However, he moves on the circular path for one and half-cycle and then he moves forward up to 2.0 km. Calculate the work done by him.
Can any object have momentum even if its mechanical energy is zero? Explain
