2006-10-30 19:55:54 · 13 answers · asked by childlikeempress 4 in Science & Mathematics ➔ Earth Sciences & Geology
Mach 1.
As the speed of an aircraft approaches the speed of sound, the flight Mach number is nearly equal to one (M = 1),
At sea level the Mach No = (Speed of aircraft) divided by (Speed of sound).
On an average day the speed of sound is 761 mph. So an aircraft travelling at sea level, at a speed of 500 MPH, would be flying at 500/761 = Mach 0.66
Named after Ernst Mach, Austrian scientist.
2006-10-30 19:58:08 · answer #1 · answered by avian 5 · 2⤊ 0⤋
What is the speed of sound at sea level known as?
It is still known as the speed of sound no matter what altitude you're at.
Although air density changes the figure for the actual speed needed to break the sound barrier.
2006-10-31 22:30:21 · answer #2 · answered by Bror Jace 2 · 0⤊ 0⤋
The speed of sound at sea level, 0 feet is 761mph or Mach 1. On Mars Mach 1 is 546 mph, just thought you might be interested!
2006-10-30 22:32:46 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Mach 1
2006-10-31 11:18:05 · answer #4 · answered by PAUL H 3 · 0⤊ 0⤋
The density of water is four times higher than air
if the speed of sound at air is 720mph then the
speed of sound will be 1/4 times of speed at air
that would be 180mph to be precise
2006-10-31 02:04:10 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Depends on how fast you are running at the time.
If you are in a car doing 60 mph and you whisper in to the air by opening the window. someone sixty miles away will hear your whisper after an hour.......that is at sea level.
Do not try taking your car to say 30000 ft level as it will be too heavy for you and you will not be able to whisper...
2006-10-31 22:36:34 · answer #6 · answered by Anonymous · 0⤊ 0⤋
The speed of sound
2006-10-30 20:20:07 · answer #7 · answered by Anonymous · 0⤊ 0⤋
MACH 1
(I wish that I owned a 1971 FORD MACH 1 Mustang)
Isn't that the muscle car that Steve McQueen drove in the famous chase scene in "Bullitt"?
2006-11-02 00:35:58 · answer #8 · answered by ursaitaliano70 7 · 0⤊ 0⤋
4 times in air thats mean 320 meter/sec x4=1280 meter/sec or 0.8 mile/sec
2006-10-30 20:06:11 · answer #9 · answered by lostship 4 · 0⤊ 0⤋
mach 1 ---------- 1,090ft per secound in air at 0 deg C
2006-10-30 20:01:11 · answer #10 · answered by SCARFACE 2 · 1⤊ 0⤋