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Mach is the speed of an object expressed as a multiple of the speed of sound in the same medium. Thus, an object travelling at 686 metres per second through air, at sea level, is travelling at Mach 2 because sound would travel through it at 343 m/s. However, it the object was travelling under water at the same speed then it would be travelling at approx Mach 0.46 since sound travels at 1484 m/s through water.

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Q: Is it Mach or times the speed of sound?
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Related questions

How fast is Mach 1 Mach 2 Mach 3 Mach 4 etc to the fastest Mach level on record?

The mach number is the speed, compared to the speed of sound in air. Thus, mach 1 is the speed of sound, mach 2 is twice (2 times) the speed of sound, mach 3 is 3 times the speed of sound, etc.


What does Mach 25 mean?

Mach refers to the speed of sound, for example, mach 1, equals the speed of sound, mach 2, the speed of sound times 2. So, mach 25 would mean, 25 times the speed of sound.


Why is Mach times the speed of sound?

That's how "Mach" is defined.


What is 96mach?

0.96 mach is 96% the speed of sound. Mach 96 would be 96 times the speed of sound.


What is the word 5 times the speed of sound?

The word for 5 times the speed of sound is "supersonic."


What is faster then Mach 1?

Speeds faster than Mach 1 are measured in multiples of Mach, such as Mach 2 (twice the speed of sound), Mach 3 (three times), and so on. Each Mach number represents the speed of an object in relation to the speed of sound.


What is mach 8?

Mach 8 is a unit of speed equal to 8 times the speed of sound. At sea level and room temperature, the speed of sound is approximately 761 mph (1,225 km/h). Therefore, Mach 8 would be around 6,088 mph (9,800 km/h).


How fast is mach1?

Mach 1 is one times the speed of sound, which equals the speed of sound, which is 768mph.


What speed is Mach 2.5?

Mach is a unit of speed based on the speed of sound (which varies with altitude and pressure). Mach 1 is the speed of sound, 340.29 m/sec or about 761.2 mph at sea level. Mach 2.5 would be 2.5 times as fast, or about 1900 mph.


What is mach speed?

340.29 m/s


What is mach 0.925?

Mach 0.925 refers to an aircraft's speed as a multiple of the speed of sound. At this speed, the aircraft is traveling at 925 miles per hour, which is approximately 1.2 times the speed of sound in air.


How many miles per hour can supersonic fly?

Mach refers to the speed of sound in air. Typically about 750 mi/hr but it varies faster or slower with temperature from cold to hot respectively. Mach one is one times speed of sound. Mach 3 would be three times speed of sound.