Advertisements
Advertisements
प्रश्न
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in the burning of a match stick.
Advertisements
उत्तर
Chemical energy changes into heat and light energy.
APPEARS IN
संबंधित प्रश्न
State the energy changes that occur in a watch spring while it unwinds.
State the energy changes in the following while in use An electric oven.
State the energy changes in the following while using a microphone.
State the energy changes in the following while using an electric motor.
State the energy changes that occur in the following :
Burning coal while operating a steam engine.
State the energy changes in the following case while in use:
Bio-gas burner
Avinash can run with a speed of 8 m s–1 against the frictional force of 10 N, and Kapil can move with a speed of 3 m s–1 against the frictional force of 25 N. Who is more powerful and why?
The power of a motor pump is 2 kW. How much water per. the minute the pump can raise to a height of 10 m? (Given g = 10m s−2)
The velocity of a body moving in a straight line is increased by applying a constant force F, for some distance in the direction of the motion. Prove that the increase in the kinetic energy of the body is equal to the work done by the force on the body.
A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies. Which one has larger kinetic energy?
