Given that the temperature difference makes very little difference in the REAL world--the temperature of the atmosphere is more or less the same in all areas at 50,000 feet above sea level.
2006-12-22 05:44:19 · 7 answers · asked by john S 1 in Science & Mathematics ➔ Physics
can't find the formula but it is about 550 mph
2006-12-22 05:48:09 · answer #1 · answered by itsbob1 5 · 0⤊ 0⤋
Well ... first, the wind. It can come from different reasons, even from cold air falling down the hills, as a katabatic wind is but, in most cases, it comes from the gradient force that fill lower pressure with air from higher pressure. We imagine then that it is such a wind. Then there is the fact that the earth surface has a drag effect of the wind that is a fluid. This is called the Buys-Ballot law and is the reason the wind moves more toward the center of a low pressure near the ground than above. So, the surface influences both wind direction and speed. But if you are on a plateau at a certain altitude, if it is big enough to exert the same drag for a long enough period of time, then ... it would be the same effect as being at sea level, wouldn't it? So the unknown here is the fetch; over which distance the wind blows over the plateau. If long enough, there is no reason the wind speed should be superior to the one found at sea level. Do we agree?
2016-03-17 22:14:00 · answer #2 · answered by Anonymous · 0⤊ 0⤋
That would depend on air density and temp. At sea level on a calm day with temperature at 70 degrees the speed is usually 770 M.P.H. Because the air is less dense at 50,000 feet sound moves slower. I can't remember just what it is, but it runs in my mind that it is around 650 MPH. It could be as much as 740MPH though. Anyway, it is slower.
2006-12-22 06:11:57 · answer #3 · answered by gyro-nut64 3 · 0⤊ 0⤋
If you have the temperature data availbale, then
C=speed of sound at Mean sea level, at 20 deg C
T=(Theta)=Temperature in degree Celcius
then the formula is
C = 331.3 + (0.6*T) meters per sec.
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2006-12-22 19:25:25 · answer #4 · answered by Starreply 6 · 0⤊ 0⤋
This is SO misunderstood. The speed of sound in a gas (such as air) is a function of temperture and NOT pressure or density. In fact it is proportional to the square root of the absolute temperature. If you are working in Fahrenheit, the speed of sound is:
C = 1125 * sqrt((T+ 459)/527) ft/sec
2006-12-22 18:21:10 · answer #5 · answered by Pretzels 5 · 1⤊ 0⤋
Probably close to zero. Depends on what the pressure is at that altitude......roughly 9 miles. You would probably have to be relatively close to the source to hear it if you can hear it at all.
2006-12-22 06:05:15 · answer #6 · answered by Anonymous · 0⤊ 0⤋
here is some data
http://www.madsci.org/posts/archives/jul2001/996618593.Ph.r.html
but just not at 50,000 feet
2006-12-22 05:49:16 · answer #7 · answered by Anonymous · 1⤊ 0⤋