2006-07-17 17:54:30 · 14 answers · asked by Daren U 1 in Cars & Transportation ➔ Aircraft
Mach 1 is the speed of sound, and varies according to the temperature. It is generally considered to be about 762 Miles Per Hour ( 1,225 km·h ) at standard temp of 15 C.
Check this Wikipedia page for more info...
2006-07-17 17:58:45 · answer #1 · answered by JetDoc 7 · 0⤊ 0⤋
The FAA defines Mach Speed as 650 MPH at seal level on a standard day (or it's equivilent at pressure altitude and air density).
A Standard day is 75 degrees F at 29.9 barometric pressure.
2006-07-18 01:00:54 · answer #2 · answered by David T 4 · 0⤊ 0⤋
Ok I have to give my two cents, since there are so many who believe it varies by pressure... I agree IT IS TEMP NOT PRESSURE. The fact that the temperature decreases on average of 2 degrees celisius per thousand feet is why the speed of sound lowers with altitude..
2006-07-18 03:25:24 · answer #3 · answered by Brian S 2 · 0⤊ 0⤋
Temperature AND pressure both decrease with altitude(unless a temperature inversion exists). The higher you go, the slower you have to go. There is one man who bailed out of a balloon at around 100,000 feet and due to the decreased pressure and temperature was able to break the sound barrier in his descent.
2006-07-18 15:47:31 · answer #4 · answered by Tom Y 2 · 0⤊ 0⤋
Depends on AIR TEMPERATURE...not PRESSURE!
FYI a quick way of determing the speed of sound in a gas
is 49.1 multiplied by the SqRoot of the O.A.T. in degrees Rankine
ie: for sea level on a ISA day...49.1 x SqRt of (460+59) = 1118fps
Source(s):
2006-07-18 01:36:13 · answer #5 · answered by helipilot212 3 · 0⤊ 0⤋
well mach 2 reffering to jetdoc is the speed of sound wihch
is 1000-1500.
2006-07-18 18:34:39 · answer #6 · answered by alex p 1 · 0⤊ 0⤋
It depends on air pressure, but around 750 mph, I think.
2006-07-18 00:58:07 · answer #7 · answered by iansand 7 · 0⤊ 0⤋
Depends on temperature, pressure, and altitude.
2006-07-18 02:59:51 · answer #8 · answered by Tony S 2 · 0⤊ 0⤋
760 mph at sea level...but it varies according to the local barometric pressure.
Confirmation can be found here:
http://www.grc.nasa.gov/WWW/K-12/airplane/mach.html
2006-07-18 00:59:06 · answer #9 · answered by bracken46 5 · 0⤊ 0⤋
It depends on altitude and temperature.
2006-07-18 18:18:29 · answer #10 · answered by KA-BOOM 3 · 0⤊ 0⤋