If the barometer is in the same place where you're measuring
the air pressure, then they're exactly equal.
76-cm column of Mercury weighs the same as air that would fill a vertical 30-km tube of the same width
They are equal.
To measure the local pressure of the Earth's atmosphere, Torricelli invented the first Mercury Barometer.
The standard sea level pressure of Earth's atmosphere - a pressure of 1 Bar or one "atmosphere".
Standard atmospheric pressure at sea level is taken as 1 atmosphere for all intensive purposes. Atmospheric pressure near to the surface of the earth is about 1 atm. If we go above it decreases and increases we move towards the center of the earth.
low pressure system and stormy weather
The answer to this question is, the Mercury and aneroid barometer
To measure the local pressure of the Earth's atmosphere, Torricelli invented the first Mercury Barometer.
If the barometer is in the same place where you're measuring the air pressure, then they're exactly equal.
The standard sea level pressure of Earth's atmosphere - a pressure of 1 Bar or one "atmosphere".
When you increase air pressure the mercury in a barometer will rise. Conversely when air pressure decreases the mercury in a barometer will drop.
A Mercury barometer is used to measure atmospheric pressure.
no it could not as the tempratues are very different
The atmosphere has numerous measurable properties, including pressure, temperature, humidity, velocity. Each of these is measured by a different instrument. Pressure is measured by a barometer, temperature is measured by a thermometer, etc.That would be a barometer. I assume you are referring to atmospheric pressure.
Maybe you mean what does a mercury barometer measure. In which case the answer is atmospheric pressure.
A barometer is used to measure air pressure. It measures the atmospheric pressure using air, mercury, or water and will be shown as inches of mercury or millibars.
Standard atmospheric pressure at sea level is taken as 1 atmosphere for all intensive purposes. Atmospheric pressure near to the surface of the earth is about 1 atm. If we go above it decreases and increases we move towards the center of the earth.
Air is "pushed" into the open end of a barometer when the pressure is higher, meaning the mercury closer to the closed end of the barometer - where the pressure is measured - will rise.
barometers with mercury measure air pressure. when the air pressure is high the mercury rises