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प्रश्न
State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.
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उत्तर
Chemical energy (chemical reaction) → Heat energy (burning)
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संबंधित प्रश्न
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A sailboat is moving due to wind energy.
Name a common device where a gear train is used
What is the condition for a force to do work on a body?
Name the physical quantity associated with the 'rate of doing work'.
What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
Fill in the boxe to show the corresponding energy transformation.
Give an example
Chemical energy changes to electrical energy.
A bucketful of water is to be drawn from a well ______ will be done when a ______ is applied to do this because there will be a ______ of water.
(displacement, work, force)
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A wind-mill is lifting water from a well.
