describe a simple barometer
Answers
Answer:
A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. A simple barometer consists of a long glass tube (closed at one end, open at the other) filled with mercury and turned upside down into a container of mercury. The barometer works by balancing the mercury in the glass tube against the outside air pressure, just like a set of scales. As air pressure increases—that is, as the air becomes heavier—it pushes more of the mercury up into the tube. As air pressure decreases, more of the mercury drains from the tube. So the level of mercury in the tube provides a precise measure of air pressure.
Answer:
the simple barometer also called the Torricelli barometer is an instrument used to measure atmospheric pressure.
it consists of a narrow thick tube glass about 1 metre long and sealed at one end. the glass tube is completely filled with Mercury and is carefully converted into a trough containing Mercury without allowing any air to enter .
the Mercury level in the tube drops a little and remains study at a particular height.the tube is fixed to a stand vertically and the height of Mercury column is used to find the atmospheric pressure.
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