what are the factors influencing atmospheric pressure and explain it.
Answers
Answer:
Temperature.
Elevation.
water vapour.
Explanation:
Because of the compression, the lower layer of the atmosphere are denser and heavier than the upper layer, which are lighter and expansive. The average air pressure at sea level is high, but it goes on declining as the elevation increases. For every 900 feet of altitude, air pressure falls by 1 inch. Gravitational force of the Earth is mainly responsible for the decreasing air pressure with increasing altitude.
Answer:
Atmospheric pressure is around us all of the time. The air you are breathing has weight, and although it doesn't weigh a lot, there is a lot of it around. This lesson will cover atmospheric pressure and its effects.
Definition
It can be odd to think of air as having weight - after all it doesn't feel like it! But the air is full of molecules and though extremely light, they do have weight. The more air you have above a thing, the more weight that thing will feel.
Atmospheric pressure is the weight of the atmosphere on a surface. The units for atmospheric pressure are conveniently known as atmospheres (atm) and the average pressure at sea level is set at 1 atmosphere (atm).
On average, the weight of the atmosphere on a square inch is 14.7 pounds at sea level. This means if you were to extended a 1-inch column from sea level to the edge of our atmosphere, all the gases inside would weigh 14.7 pounds. Another way to think about it is, if you put your hand out, there is more or less 175 pounds of atmosphere weighing down on it, and a standard 8.5 x 11 piece of paper has over 1300 pounds weighing down on it.
So why doesn't it crush us? Luckily we have evolved to deal with it and not notice it. In fact, we would have big problems if there wasn't all that pressure keeping us together
Explanation: