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What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 736 mmHg and h equals 9.2 cm?
Wiki User
∙ 12y ago
(736-92)=
644 mmHG
Wiki User
∙ 12y ago
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What instruments are used to measure the atmospheric pressure?
Usually the instrument used is called a barometer- which could be a closed end manometer or an aneroid barometer.An altimeter actually also measures atmospheric pressures - but for a different purpose.
Is a thermometer a weather tool?
Not really, a hydrometer is used for measuring the specific gravity of liquids, for instance battery acid, and when making wine and beer at home. Perhaps you're thinking of a hygrometer, which measures relative humidity.
Why does the height of the liquid column in a barometer changes as atmospheric pressure changes?
Pressure tendancies measure short term weather. The mercury in a barometer will rise with atmospheric pressure denoting fairer weather and a fall in barometric pressure warns of inclement weather.
What does a decrease in the height of the mercury column usually indicate on a barometer?
low pressure system and stormy weather
If the atmospheric pressure is 24.9 inches what is the pressure in mm Hg?
18,920 mm of mercury at 24.9 ATM
To measure pressure above atmospheric pressure you would use a?
mercury manometer
What is an open arm manometer?
It is a type of manometer, an object used to measure the pressure of different things, and the open armed manometer allows for the atmospheric pressure in the tube of the manometer. So the sample gas pressure pushes on the mercury that is already being pushed on by the atmospheric pressure. Then you add the atmospheric pressure to the change in the mercury (in mm) and that gives you your pressure. It's like a tire gauge.
To measure a pressure above atmospheric pressure you would use?
You would use a mercury manometer
How do you use a manometer?
A manometer is a device that is used to measure the pressure of a fluid. The U-shaped glass tube is partially filled with a liquid, usually mercury. The difference between the height of the mercury corresponds to the difference between the pressure of the fluid in the container and the atmospheric pressure.
Why you use mercury manometer to measure atmospheric pressure at sea level rather alcohol?
Mercury has two advantages over alcohol when it comes to measuring pressure in a manometer: 1) it is far denser than alcohol. A column of mercury need only be about 760 mm ( about 3/4 of a meter) high to exert a pressure equal to atmospheric pressure at sea level. Alcohol would have to be over 13 meters high to reach the same pressure! (rather impractical) 2) Mercury has a very low vapor pressure so it doesn't evaporate when exposed to the atmosphere. It also contributes a negligible amount of pressure above the column on the sealed end of the manometer for pretty much any atmospheric temperature. Alcohol has a significant vapor pressure so it would tend to evaporate when exposed to the atmosphere. It also has a high enough vapor pressure that it would contribute a noticeable amount of pressure on the sealed end of the manometer - and the pressure would vary quite noticeably over the range of temperatures that atmospheric manometers are commonly exposed to - so the manometer reading would always have to be corrected for temperature - more so than the mercury manometer must be.
Is manometer used to measure the pressure of liquid?
yes,manometer is an instrument . It is used to measure pressure of liquid.
What happen when mercury used in inverted manometer?
When mercury is used a manometer fluid and the manometer tube is inverted it will measure the small pressure difference in liquids. This is a tool used by scientists.
What is the instrument used to determine air pressure is called?
The instrument used to determine air pressure is called a barometer. A simple barometer is a long glass tube filled with mercury that it turned upside down into another container filled with mercury.
If the atmospheric pressure is 29.4 inches of mercury what is the corresponding pressure of mercury?
If the atmospheric pressure is 29.4 inches of mercury the corresponding inches of mercury is: 880.
How does a mercury pressure device work?
A sphygmomanometer is also known as a mercury pressure device. It works by a mechanical manometer made of mercury that measures the pressure.
What instruments are used to measure the atmospheric pressure?
Usually the instrument used is called a barometer- which could be a closed end manometer or an aneroid barometer.An altimeter actually also measures atmospheric pressures - but for a different purpose.
A manometer is used to measure?
an instrument for measuring the pressure of a fluid, consisting of a tube filled with a liquid, the level of the liquid being determined by the fluid pressure and the height of the liquid being indicated on a scale
