Question

A barometer is constructed using a liquid (density = 760 kg/m3). What would be the height of the liquid column, when a mercury barometer reads 76 cm? [NEET-2020 (Phase-2)] (density of mercury = 13600 kg/m3) (1) 0.76 m (2) 1.36 m (3) 13.6 m (4) 136 m​
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Answer 1

Answer:13.6

Explanation:

pressure of liquid=pressure of mercury

Answer 2

The correct option is (2) 1.36 m.

• A barometer measures atmospheric pressure by balancing the weight of the air above with the weight of a column of liquid (usually mercury or water) in a glass tube that is open at one end and closed at the other.
• The height of the liquid column is directly proportional to the atmospheric pressure.
• When the mercury barometer reads 76 cm, it means that the atmospheric pressure is balancing the weight of a 76 cm column of mercury.
• To convert this to the height of a column of water (density = 760 kg/m3), calculate the equivalent weight of water that would have the same height as the 76 cm column of mercury.

Therefore, the correct option is (2) 1.36 m.

To learn more about barometer from the given link.

https://brainly.in/question/1206237

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