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प्रश्न
Write true or false of the following statement.
A gum bottle lying on a table has no energy.
पर्याय
True
False
MCQ
चूक किंवा बरोबर
उत्तर
False.
A gum bottle lying on a table has energy.
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संबंधित प्रश्न
Write true or false of the following statement.
One form of energy cannot be converted into another form.
Fill in the blank
Cooking gas converts _______ energy into heat energy.
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 |
What do you mean by conservation of mechanical energy? State the condition when does it hold.
Match the following:
| Column A | Column B |
| (a) Needle | (1) class II lever |
| (b) Doorknob | (2) inclined plane |
| (c) Ramp | (3) Class I lever |
| (d) Lemon crusher | (4) Wheel and axle |
| (e) Seesaw | (5) wedge |
How many joules are there in one kilowatt-hour?
What is the common name of '1 kWh' of electrical energy?
The commercial unit of energy is :
Study the following activity and answer the questions.
- Take two aluminium channels of different lengths.
- Place the lower ends of the channels on the floor and hold their upper ends at the same height.
- Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.
Questions -
- At the moment of releasing the balls, which energy do the balls have?
- As the balls roll down which energy is converted into which other form of energy?
- Why do the balls cover the same distance on rolling down?
Note: The question is wrong. It should be "Why do the balls cover the same distance after rolling down"? - What is the form of the eventual total energy of the balls?
- Which law related to energy does the above activity demonstrate? Explain.
