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प्रश्न
Name the device or machine which convert :
Chemical energy into heat energy.
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उत्तर
A gas stove converts chemical energy into heat energy.
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संबंधित प्रश्न
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. Taking g = 10 m s−2, calculate:
- the potential energy possessed by the ball when it is initially at rest.
- the kinetic energy of the ball just before it hits the ground?
State whether the object possess kinetic energy, potential energy, or both :
A man climbing a hill _____________.
Name the device which converts electrical energy into mechanical energy.
Name the device or machine which convert :
Heat energy into kinetic energy (or mechanical energy).
Describe the energy changes which take place in a radio.
What do you understand by the term 'transformation of energy"? Explain with an example.
What is the meaning of the symbol kWh? What quantity does it represent?
Which one of the following is not the unit of energy?
A microphone converts :
An automobile engine propels a 1000 kg car (A) along a levelled road at a speed of 36 km h–1. Find the power if the opposing frictional force is 100 N. Now, suppose after travelling a distance of 200 m, this car collides with another stationary car (B) of the same mass and comes to rest. Let its engine also stop at the same time. Now the car (B) starts moving on the same level road without getting its engine started. Find the speed of the car (B) just after the collision.
