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The region above mercury in a barometer ...

The region above mercury in a barometer consists of .........

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To solve the question regarding the region above mercury in a barometer, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Barometer**: A barometer is an instrument used to measure atmospheric pressure. It typically consists of a glass tube filled with mercury, which is inverted into a mercury reservoir. 2. **Identifying the Components**: In a barometer, the mercury in the tube is balanced by the atmospheric pressure acting on the surface of the mercury in the reservoir. The height of the mercury column changes based on the atmospheric pressure. ...
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