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प्रश्न
Name the device or machine which convert :
light energy into heat energy.
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उत्तर
A solar water heater converts light energy into heat energy.
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संबंधित प्रश्न
A ball is placed on a compressed spring. What form of energy does the spring possess? On releasing the spring, the ball flies away. Give a reason.
Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when
- The body is at the top.
- the body has fallen a distance x.
- the body has reached the ground.
Is energy a vector quantity?
State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________
What type of energy is possessed : by the stretched rubber strings of a catapult?
Name the device or machine which convert :
Electrical energy into sound energy.
What kind of energy transformation take place at a hydroelectric power station?
Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
A ball falls to the ground as shown below :
Which law you have made use of in answering this question?
A microphone converts :
