Advertisements
Advertisements
प्रश्न
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in a car going uphill.
उत्तर
- Kinetic energy to potential energy (because the vehicle is approaching a specific height).
- Chemical energy to Kinetic energy (because the car is in motion).
APPEARS IN
संबंधित प्रश्न
State the energy changes in the following while in use An electric oven.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in respiration.
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.
State the energy changes in the following case while in use:
A solar cell
State the law of conservation of energy.
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?
Can any object have momentum even if its mechanical energy is zero? Explain
Is it possible that an object is in a state of accelerated motion due to external force acting on it, but no work is being done by the force? Explain it with an example.
Define watt. Express kilowatt in terms of joule per second. A 150 kg car engine develops 500 W for each kg. What force does it exert in moving the car at a speed of 20 ms–1?
State the energy changes in the following case while in use:
An electric cell in a circuit