It depends on the pressurization schedule of the Aircraft but in case of an airliner it will be around 6500 feet.
no 5 mi = 26400 ft 35000 ft = 6.628 mi
21% of 650 mm Hg
The largest US Air Force airplane is the C-5 Galaxy. It is 247 ft. 1 in. long, 222 ft. 9 in. from wing tip to wing tip, and 65 ft. 1 in. tall.
Actually the amount of air doesn't increase, the pressure outside the baloon decreases. When you fill a balloon at sea level, the air inside the balloon is at sea level pressure. When you climb in an airplane to 35,000 ft, the pressure outside the balloon decreases. Since the pressure is higher inside, it can push out more. This is also the same principal for when your ears pop when you climb and descend.
There are 6.628787865 miles in 35000 feet.35000 feet x 0.000189393939 miles/1 foot = 6.628787865 miles1 foot = 0.000189393939 milesAnswerAlgebraic Steps / Dimensional Analysis35,000 ft*1 mi5280 ft=6.628787879 mi
ft = feet so 35000 feet = 35000ft ft stands for feet! YOU STUPID PERSON!
35,000 square feet is 0.8 acre.
The answer is 35000 cubic feet.
The pressure of rarefied air is strongly different from the pressure of a big layer of water.
10668 meters Direct Conversion Formula35,000 ft* 0.3048 m 1 ft = 10,668 m
35,000 square feet = about 0.8035 acres.
Commercial aircraft are pressurized to the equivalent of 8,000 ft of altitude, or lower. That means air pressure in the cabin is lower, not higher. Many people in Colorado live at 8,000 ft. Your barometer should be fine.However, while you could bring a dial type barometer aboard the aircraft, a mercury barometer could not be (hazard of the mercury in it.)