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प्रश्न
State the energy changes which take place when:
A magnesium ribbon burns in air.
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उत्तर
During the burning of magnesium, chemical energy changes to heat and light energy.
संबंधित प्रश्न
Define calorific value of a fuel.
What is the main source of energy for earth?
What is a solar cell?
Name the energy changes for the following:
bicycle brakes
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.
Give three examples of bodies possessing potential energy.
State the energy changes which take place when:
A toy car spring is wound and car is made to run on level floor.
A boy sits and stands repeatedly. Draw a graph showing the variation of potential energy with time.
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
Can you tell?
What are the various forms of energy?
