explain any four daily activities related to atmospheric pressure
Answers
Answer:
Explanation:
playing instrument
drinking through a straw
blowing up a balloon
ears getting blocked
First let's see what Atmospheric Pressure is?
=> It is defined as the force per unit area exerted against a surface by the weight of the air above that surface. At sea level, the weight of the air above an "unit area" of 1 square centimeter would be 1.033 kilograms. In other words, the pressure applied by air on the unit area would be 1.033 kilograms. Meteorologists use a unit for pressure called a
•>A blown-up balloon is a good example of atmospheric pressure.
The air pressure inside the balloon is higher than the atmospheric pressure therefore the balloon - made of elastic material - expands, and because the pressure is equal in all directions, it is spherical in shape. However, balloons are made in different shapes as well, but the pressure is always equal in all directions. When a balloon bursts due to any reason, it is the air inside the balloon escaping rapidly and mixing with the atmosphere.
The air pressure inside the balloon is higher than the atmospheric pressure therefore the balloon - made of elastic material - expands, and because the pressure is equal in all directions, it is spherical in shape. However, balloons are made in different shapes as well, but the pressure is always equal in all directions. When a balloon bursts due to any reason, it is the air inside the balloon escaping rapidly and mixing with the atmosphere.
Another example is an airliner in flight. An airliner is virtually a pressure capsule—like a big aluminum can filled with air. Typically, an airliner flying at 10,000 meters, the pressurization system might maintain the cabin at the pressure you would experience at ~2,000 meters - which is about 0.77 kg/cm². The pressure outside the aircraft will be around 0.25 kg/cm² only. In case of an unlikely event of a door blowing off an airliner at high altitude, all the air in the cabin would be sucked out by the lower pressure outside, and a momentary thick fog would envelope the cabin as the water vapor in the air condensed instantly. Loose articles would fly around and foam rubber would burst as the tiny air bubbles within it expanded. All this is due to the sudden change in atmospheric pressure. If the passengers are not sucked out along with their seats, they would have approximately 12 seconds until they start suffering from disorientation and losing consciousness which will ultimately result in death.
•>Another example is the ears blocking due to change in pressure. The Eustachian tube is a thin, membrane-lined tube that connects the back of the nose with the middle ear. The air in the middle ear is constantly being absorbed by its lining and re-supplied through the Eustachian tube. In this manner, air pressure on both sides of the eardrum stays about equal. If and when, the air pressure is not equal the ear feels blocked. Any situation in which rapid altitude or pressure changes occur creates the problem. It may be experienced when riding in elevators or when diving to the bottom of a swimming pool or driving up mountains.
•>Air travel is associated with rapid changes in air pressure. To maintain comfort, the Eustachian tube must open frequently and wide enough to equalize the changes in pressure. This is especially true when the airplane is landing, going from low atmospheric pressure down closer to earth where the air pressure is higher. Personally I have no problem when the plane takes off and reaches max altitude, but both my ears get blocked while landing, and it's extremely painful.
•>Fountain pens (ink filled pens) were popular in my days when we did not have ball point pens. In case some of you have not seen one:
•>If a passenger on an airliner carried a fountain pen in his pocket, he would find that the ink has spilled out and stained his pocket. This is because the air inside the pen will expand or contract depending on the change in pressure. The cabin pressure of an aircraft at this height is the equivalent of being at 2,000 meters which has quite a severe impact on the inside of your pen as it would have retained the same pressure it had at ground level at the time of taking off. The result? A large collection of ink will gather near nib/feed section of the pen whilst the expanding air will push the ink out.
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