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प्रश्न
Select the correct alternatives
When we rub our hands
विकल्प
kinetic energy changes into potential energy
mechanical energy changes into heat energy
potential energy changes into kinetic energy
heat energy changes into mechanical energy.
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उत्तर
mechanical energy changes into heat energy
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संबंधित प्रश्न
Fill in the blank
The S.I.unit of energy is ______
Match the following columns
| COLUMN A | COLUMN B |
| 1. Running water | 1. heat energy |
| 2. Burning | 2. vibrations |
| 3.Energy | 3.atom bomb |
| 4.Sound energy | 4.kinetic energy |
| 5.Nuclear energy | 5.joule |
Select the correct alternatives
The correct statement is
What is potential energy ? State its unit.
State two factors on which the potential energy of a body at a certain height above the ground depends.
What is energy?
Name two units of power bigger than watt.
A certain household consumes 650 units of electricity in a month. How much is this electricity in joules?
The commercial unit of energy is :
The weight of a person on planet A is about half that on the earth. He can jump up to 0.4 m in height on the surface of the earth. How high he can jump on planet A?
