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प्रश्न
What happens to a metal ball when it is heated? What does this show?
उत्तर
When metal ball is heated, it expands. This can be proved by following experiment:
Take a metallic ring and ball. Try to pass the metal ball through the ring. The ball is able to pass through the ring. Now heat the metal ball for 5-6 minutes. The hot ball is not able to pass through the ring.
This shows that a solid expands on heating. Now cool the ball, it again passes through the ring. This shows that a solid contacts on cooling.
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 |
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| I | II | III |
| The metal ball passes through the ring | Metal ball is heated | The metal hall is unnble to pass through the ring after being heated |
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संबंधित प्रश्न
What is the physical state of water at 25°C.
Name one common substance which can be easily changed from one state to another by heating or cooling.
Which of the following energy is absorbed during the change of state of a substance ?
Which of the following factors are responsible for the change in state of solid carbon dioxide when kept exposed to air ?
- increase in pressure
- ncrease in temperature
- decrease in pressure
- decrease in temperature
Write whether the following statement is true or false:
Solids have the larger inter-molecular space
Give two examples of the following:
Substances which are rigid and not compressible
In the paragraph below, write ‘solid’, ‘liquid’ or ‘gas’ in each of the brackets depending on the substance referred to just before.
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What will happen if....? And why?
A bell is made of wood.
Who am I?
I have no shape whatsoever!
Why does this happen?
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