2006-07-23 07:12:32 · 13 answers · asked by Pound Shop Price List 2 in Environment
Mach 2 is twice the speed of sound. Mach 3 is three times the speed of sound.
This speed measurement is special because the speed of sound varies with the adiabatic index and the temperature of air.
c = sqrt(k * R * T) if you wanted to know, where R is the gas constant. Mach is simply M = S/c where S is the speed.
Simply put, the speed of sound in a gas depends on the temperature and the specific heat capacity of a gas. This means that we cannot give a set "speed" in terms of mi/hr or km/hr to Mach because it will VARY with the altitude and temperature of air.
When most people convert the Mach number into km/hr or mi/mr, they are referring to the speed in relation to sound at **sea level** at standard temperatures.
Thus, at these conditions, Mach 2 = 1 522 mi/hr or 2450 km/hr.
Now, almost nothing (with exception to firearms) flies at sea level at Mach 2. So if we were talking about something like, say, the Concorde which has a cruising altitude of 55,000 ft the speed would be different. At this altitude, the aircraft will be travelling 1336 mi/hr or 2150 km/hr if it were traveling at Mach 2.
I hope this helps.
2006-07-23 07:30:02 · answer #1 · answered by polloloco.rb67 4 · 1⤊ 0⤋
Mach 2 is twice of mach 1
Mach 1, or mach velocity is the speed that sound travels. When you hit mach speed, you rip through the sound barrier creating a sonic boom (Hence the name of a certain blue hedgehog who can run at twice the speed of sound because of an accident in the lab of Dr Kintobor.
As a guide, Mach 1 is 340 metres per second in air, in steel, 5100 m/s, water is about 1500 m/s. In space, there is no atoms present for the source to vibrate, hence sound cannot travel in the abscence of matter (A Vaccuum).
Speed of sound is also affected hy temperature, but thats a different topic.
2006-07-23 14:22:25 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Twice the speed of sound.
The actual speed depends on the medium. eg. Mach 2 in a steel girder will be much faster than mach 2 in air (for an aircraft).
Sound travels faster in dense materials.
2006-07-24 06:56:36 · answer #3 · answered by Nothing to say? 3 · 0⤊ 0⤋
Mach 1 is 1100 feet per second or 750 MPH. Therefore Mach 2 is 2200 feet per sec or 1500 MPH.
In laymen's terms Haulin A**
2006-07-23 14:30:11 · answer #4 · answered by orion_1812@yahoo.com 6 · 0⤊ 0⤋
Twice the speed of sound. The speed of sound varies as the square root of the absolute temperature, so at high altitudes where the temperature is cold, sound travels more slowly than at room temperature. At the altitude where the SST flew (about 55,000 feet -- temperature -55 F), Mach 2 is about 1350 mph.
2006-07-23 14:44:36 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Speed of sound is 761 mph(1,223Km/h) at sea level.Mach 2 as follows as 1522 mph (2,447 Km/h)
Mach 2 @ 30,000 ft.(9,150 m) it's only 1356 mph (2,180 Km/h) speed of sound generally decrease as Altitude increases.
2006-07-27 10:36:59 · answer #6 · answered by Anonymous · 0⤊ 0⤋
im not sure but i think mach 2 is twice the speed of sound.
have a nice day! :)
2006-07-23 14:16:07 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Twice the speed of light
which is about 2400 kph
don't know the miles i'm Belgian
2006-07-23 14:18:10 · answer #8 · answered by peter gunn 7 · 0⤊ 2⤋
it depenends on altitude, density of air, temperature and some other factors.. It is approximately 1400 mph
2006-07-24 08:38:49 · answer #9 · answered by Sara B 2 · 0⤊ 0⤋
1340mph - the speed Concorde flew at.
2006-07-23 14:17:56 · answer #10 · answered by nemesis 5 · 0⤊ 0⤋