Скачать или смотреть Why is Pressure also measured by Mercury

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Pressure is commonly measured using a device called a barometer, which was first invented by Italian scientist Evangelista Torricelli in the 17th century. One of the most common types of barometer is the mercury barometer, which uses a column of mercury to measure atmospheric pressure.

There are several reasons why mercury is used in a barometer. First and foremost, mercury is a dense liquid that is about 13 times heavier than water. This means that it can support a much taller column than water, making it a more sensitive instrument for measuring changes in atmospheric pressure.

In addition, mercury has a low vapor pressure, which means that it doesn't easily evaporate at room temperature. This makes it a stable and reliable substance to use in a barometer, as there is little risk of the liquid evaporating or leaking out of the device over time.

Finally, mercury is a relatively inert substance that doesn't react with most other materials. This means that it can be used in a variety of different barometer designs without corroding or degrading the materials around it.

Overall, the use of mercury in barometers has been a longstanding tradition due to its unique combination of high density, low vapor pressure, and chemical stability. While alternative pressure-measuring devices have been developed in recent years, mercury barometers are still widely used in many scientific and meteorological applications toda