We live on the earth which is surrounded by air. The layer of air surrounding the earth is called atmosphere.
Air expands on heating can be explained with the help of following experiment.
Material Required:
A small balloon, two buckets/mugs, hot water, and ice
Procedure:
Observation:
When the balloon is placed in ice-cold water, it develops wrinkles. The wrinkles disappear and the balloon gets back its shape when it is placed in hot water.
Which of the following will rise the highest ? | |||
Right Option : B | |||
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A fire alarm usually detects smoke in case of fire. Where should such an alarm be placed in a room? | |||
Right Option : D | |||
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Which of the following are correct ? (a) The layer of air surrounding the earth is called atmosphere. (b) The gas thermometers are based on the fact that gases expand on heating. (c) If we place a hot air balloon over cold water, the air inside it cool down so it contracts. | |||
Right Option : D | |||
View Explanation |
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