Advertisements
Advertisements
प्रश्न
State the energy changes which take place when:
A magnesium ribbon burns in air.
Advertisements
उत्तर
During the burning of magnesium, chemical energy changes to heat and light energy.
संबंधित प्रश्न
Fill in the blank
Energy possessed by a compressed spring is ______ energy.
State the work energy theorem.
What is meant by the renewable and non-renewable sources of energy? Distinguish between them giving two examples of weach.
A pebble is thrown up. It goes to a height and then comes back on the ground. State the different changes in form of energy during its motion.
Name the form of energy in which potential energy can change.
A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:
The total energy possessed by the body at any instant? (Take g = 10 ms-2).
Write the type of energy possessed in the following case:
A moving cricket ball.
State the energy changes which take place when:
Water stored in dams rotates turbine connected to a dynamo.
State the energy changes which take place when:
A battery lighting up a bulb.
A ball of mass 50 g falls from a height of 2m and rebounds from the ground to 1.6 m. Find:
(i) The potential energy possessed by the ball when initially at rest.
(ii) The kinetic energy of the ball before it hits the ground.
(iii) The final potential energy of the ball.
(iv) The loss in kinetic energy of the ball on collision. (Take: g = 10N kg−1)
