# Compare air at 18000 feet to air at sea level?

Air at 18000 ft is much less dense therefore making it harder for the hujman body to intake oxygen and filter it through the lungs.

### How do you get data on air pressure from high in the atmosphere?

If you have an instrument which has something to compare force with a column of air, such as a fluid, depending on the pressure air makes on that fluid you'll know what the air pressure is when you compare the same experiment done at sea level, where atmospheric pressure is 1 atm. If you were to use mercury for instance, at sea level, the distance the column of air makes the fluid move is 760…

### How many square feet does an 18000 BTU air conditioner cool?

The general rule is 600 sq.ft. per ton of refrigeration, so an 18000 BTU A/C will cool approx. 900 sq.ft. . There are many variables, such as insulation R value, normal summer climate in your area, age of the structure, etc., so this is just a guide. To know for sure, have a heat load calculation done.

### Why you have flight level in aviation?

Flight levels exist in aviation to make high altitude flying easier on pilots and controllers. First, some background. Since the altimeter uses atmospheric pressure to measure altitude, weather conditions can effect the reading on an altimeter. For example, if a high pressure system comes in, the altimeter in the aircraft would read lower than you actually are. For that reason, whenever a pilot gets in an airplane, he has to set the altimeter to the…

### Why is air pressure less at sea level and it's higher on a mountain top?

You have it backwards. Air pressure is the caused by the weight of the column of air pressing down on people or objects near the surface. Pressure is greatest at (or below sea level) and decreases with altitude (for the simple reason that the higher you climb, the less air is above you). Because water is about 1,000 times denser than air, the weight of air at sea level is about equal to 33 feet…

### How much does 1 cubic mile of air weigh?

5280 X 5280 X 5280 = Cubic feet in a cubic mile == 147,197,952,000 One pound of air = 12.3609 Cubic feet of air, at sea level. Then divide 147,197,952,000 by 12.3609 = 11,908,352,300 = lbs. of air per cu. mile, at sea level. Standard atmospheric pressure is 14.7 lbs per sq./inch at sea level. Square inches in a square mile , 5280 X 5280 X 144 = 4,014,489,600 sq.in./sq.mile Air press per sq. mile…

### Does air pressure increase as you climb from land at sea level to the top of a mountain?

No. The air pressure decreases with altitude, as the molecules are not being pressed together as greatly. In simple terms, there is a "higher stack" of air molecules pushing down on you when you are closer to the surface. The pressure (and oxygen level) drops off dramatically by around 10,000 feet in altitude.

### How many feet below sea level equals 10 Bar?

1 Bar represents one atmosphere of air pressure. 10 Bar is approximately equal to 100 Meters of water depth. 1 meter = 3.28083989501 feet. It follows that 100 meters = 328.083989501 feet. Therefore, 10 Bar is approximately equal to the expected pressure at 328.083989501 feet of water depth (not sea level).

### Why is a pressure cooker even more useful when cooking food in the mountains then wen cooking at sea level?

Water only boils at 100 degrees Celsius at sea level. As you go up in height, the air pressure drops and water boils at a lower temperature. For every 1000 feet you go up the boiling point drops by 1 degrees Celsius. So at 3000 feet the boiling point is 97 degrees Celsius. This means that for every 3000 feet you climb it takes an extra 30 minutes to kook stuff in boiling water. Thus…

### Distance of airplane in the air to land?

Airplanes in flight can be just a few feet from the surface, during air shows and demonstrations, or when more than 500 feet from people or structures over water and in remote areas. Airliners usually fly around 35,000 feet or about 11,000 meters above the "standard datum plane" which on a "standard" day would be the same number of feet and meters above sea level. So by subtracting the "height above sea level" of the…