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प्रश्न
State the energy changes which take place when:
Burning of coal.
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उत्तर
The chemical energy changes into heat energy.
संबंधित प्रश्न
What is geothermal energy?
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
How many MeV are equivalent to 1 atomic mass unit (u)?
Two toy-cars A and B of masses 500 g and 200 g respectively are moving with the same speed. Which of the two has the greater kinetic energy?
Explain the principle of producing electricity using the nuclear 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.
What kind of energy is possessed in a situation when?
A fish moving in the water.
Obtain an expression for the potential energy of a body of mass m at a height h above the ground.
Give one example when:
Potential energy changes to electric energy.
Draw a diagram to show the energy changes in an oscillating simple pendulum. Indicate in your diagram how the total mechanical energy in it remains constant during the oscillation.
