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Why the pressure vareis from moutanins to land?

The pressure decreases as altitude increases due to the decrease in air density. Air pressure is caused by the weight of the air above us, so at higher altitudes where there is less air above, there is less pressure. In contrast, at lower altitudes like in valleys or near the sea, there is more air above, leading to higher pressure.


Why must airplanes be pressurized?

At the high altitudes which airliners fly in, there is less dense. Since air is good for us humans, the cabin is pressurized in order to provide enough air to breathe.


Why are airplanes pressurized?

Most air planes are pressurized, because at high altitudes, the air pressure is less than humans can handle, which causes us to black out. Bad vacation when your pilot blacks out at 30,000 feet!


How do changes in atmospheric pressure affect people at high altitudes?

It keeps us all from blowing up and popping like balloons, and it also makes it possible for us to breathe.


What does 'aeroplanes are often pressurised'mean?

this means that the air outside the aeroplane is too thin for us to breathe and the air has to be pressurised in the aeroplane. that is why the aeroplane has masks above your seat so if the air becomes to thin the air coming through the mask is the right for you to breathe.


Where are chemtrails hit the hardest in US?

Chemtrail conspiracy theories are not supported by scientific evidence. Contrails, which are the lines left in the sky by aircraft, are simply composed of ice crystals formed when hot engine exhaust mixes with cold air at high altitudes. These contrails can form anywhere in the US where planes fly at high altitudes.


Why is there less oxygen in higher altitudes?

The higher you go the thinner the air gets. If you go to high, you could die from lack of air. > Jet fighters dont have pressurised cabins ( as commercial flights do) 25,000 feet is the crucial point, the lungs are incapable of absorbing oxygen at such low air pressure, a pressure demand mask overcomes this problem.


Which is the best explanation for how air masses move across the US?

Air masses move across the US primarily due to the jet stream, which is a fast-flowing, narrow band of air at high altitudes that often guides the movement of weather systems. Temperature and pressure differences between air masses also play a role in their movement, causing them to shift and interact with each other as they move across the country.


The words high altitudes harsh climate and only cold hardy species describe which US ecosystem?

It describes the Alpine Tundra.


How high is an aircraft in US before you see the white smoke?

That isn't white smoke, it's water vapor that is condensed out of the air by the passing of the aircraft. This is called a "contrail," which stands for condensation trail. The altitude depends upon the relative humidity and the temperature, which vary from hour to hour. Generally, this only occurs at very high altitudes.


How does the amount of air changes as you travel up through earth's atmosphere?

The amount of air decreases as you travel up through Earth's atmosphere. This is because the atmosphere is less dense at higher altitudes, leading to lower air pressure and a decrease in the concentration of gases.


How does the air force affect the lives of us citizens?

they help us by protecting us by air. just like the navy, army, air force, marines, etc.