An airplane flying at about 6Km (20,000 feet) is above how much of the Earths atmosphere?
a 99%
b 90%
c 75%
d 50%
2007-02-23 11:42:31 · 5 answers · asked by jen_miron 1 in Science & Mathematics ➔ Earth Sciences & Geology
d 50% ref Economist Desk Companion:
at sea level density is 101.3 kPa
at 5km 54.0 kPa
at 7.5km 38.3 kPa
Therefore at 6km density of air is approximately half that at sea level so there must be approximately half the atmosphere left (on a mass basis) to exert the pressure necessary to maintain this density.
2007-02-23 12:12:19 · answer #1 · answered by Robert A 5 · 0⤊ 0⤋
Well the airplane is still in the earth's atmosphere, specifically the troposphere and I don't think any of those answers are correct considering the atmosphere extends outwards of approximately 600 km. If we are only referring to the troposphere then it would be 40% as that layer is about 15 km thick.
2007-02-23 19:56:58 · answer #2 · answered by Johnny 3 · 0⤊ 1⤋
Neither. The Karman line, at 100 km (62 miles), is frequently used as the boundary between atmosphere and outer space.
2007-02-23 19:51:34 · answer #3 · answered by Kalistrat 4 · 0⤊ 1⤋
It would depend on what you are considering to be atmosphere. NASA explains this well. Try visiting web site.
http://liftoff.msfc.nasa.gov/academy/space/atmosphere.html
2007-02-23 22:13:00 · answer #4 · answered by mong115a 1 · 0⤊ 0⤋
d) 50 %
2007-02-23 19:50:27 · answer #5 · answered by Anonymous · 1⤊ 1⤋