Atmospheric Pressure
What is atmospheric pressure? What techniques are used for its measurement?
Atmospheric pressure, the weighty force of the air above a certain point on the Earth’s surface is the atmospheric pressure. It is generally expressed in such units as millibars (mb), inches of mercury (inHg) or Pascals (Pa) with the help of the instruments like barometer.
Why does the air pressure fluctuate when we go up to different altitudes?
Atmospheric pressure reduces as we move upper the atmosphere as the density air decreases. On the sea level, the pressure is at its peak because of pressing down of the air above and above this point, it gradually decreases as you rise.
What is the exact effect of atmospheric pressure on weather circulation?
Atmospheric pressure covers the changes in the weather. The high-pressure systems are usually accompanied by calm weather and clear skies, whereas the low-pressure ones are often accompanied by clouds, precipitation, and becoming storms.
What is the role of atmospheric pressure at depth for scuba divers?
While diving, scuba divers use atmospheric pressure as a reference point to determine their depth. With an increase in pressure, their instruments such as dive computers and pressure gauges become useful as they let them stay safely within the allowed limit while managing their air supply.
How does atmospheric pressure affect live forms?
There are many organisms like humans that have become adapted to the atmospheric pressure on the surface of the Earth. Variations in pressures, for instance of fast falling during air travelling or going up the mountains, sometimes can affect our bodies and need to be adjusted in order to prevent discomfort or adverse health effects.
Atmospheric Pressure
Earth’s atmosphere is like the blanket of many-kilometer high gases which timelessly wraps our planet. One of the basics of gas law is the statement that the air in the atmosphere presses down on us, creating something called air pressure. Luckily, our bodies can counterbalance this impact so we don’t really feel it. The air pressure is the highest next to the Earth’s surface, but it drops as you get higher and higher. This pressure is what we refer as atmospheric pressure, and it is about 1.01325 Pascal at sea level. Our body itself is quite used to this pressure but in very extreme essence like high altitudes, our nose might bleed because the pressure inside is higher than outside.
The gaseous envelope surrounding the earth from all around is called the atmosphere. It extends approximately up to 400 km. It contains air which is 72% nitrogen and 21% oxygen additionally to a little proportion of dioxide, chemical element, etc.