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For meteorological purposes , hot air is...

For meteorological purposes , hot air is filled into balloons.

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### Step-by-Step Solution: 1. **Understanding the Concept of Gas Laws**: - According to Charles's Law, the volume of a gas is directly proportional to its temperature when pressure is held constant. This means that as the temperature of a gas increases, its volume also increases. 2. **Application to Hot Air Balloons**: - In the case of hot air balloons, when air is heated, it expands. This expansion increases the volume of the air inside the balloon. ...
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