How is height of a liquid column affected by atmospheric pressure. Explain with the help of an activity. pls help me and pls don't give useless and inappropriate answers. pls
Answers
Answer:
A height of a liquid column will get increased or decreased according to the force of the atmospheric pressure.
Explanation:
Pressure (P) is inversely proportional to Area (A). So if the area of the column is lesser then Force (F) of the atmospheric pressure is greater. But when the Force is 0, the pressure is 0.
The atmospheric pressure decides how high or low the liquid is according to the area and force.
Pressure = Force/Area
Answer:
The air pressure at sea level is about one kilo per square centimetre. If you extend your finger that is about a square centimetre, do you feel one kilo?
Of course not because air is a fluid and it presses as much from under as above. If you want to measure the pressure you will need to remove the air from under your finger and that is difficult! ;-)
A better solution is to take a tube filled with say, water. Close the tube at one end and open at the other. When vacuum forms at the closed end, the pressure of the column of water equals that of the air. The problem is, to do that you will need a tube ten meters high! (and that is why a suction pump can’t lift water over ten meters)
We then use the heaviest fluid we know of, mercury. The column can then be reduced to 760 mm (29.9 inches). In Europe, today, we measure the pressure in hecto-Pascal (hPa) and the average pressure at sea level is then 1013.25 hPa. But in the USA, it is still measured as inches of mercury (InHg)
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