What is mach 20 in mph?

Answer 1

A mach is the speed of sound so mach 2.0 would be twice the speed of sound. The speed of sound actually changes based on altitude and weather. The higher you go the faster it travels because of less air resistance. Most folks generally accept the speed of sound to be 657 miles per hour at 10,000 feet.

Answer 2

Mach is a relative measure: the Mach number is the speed of an object travelling through a particular medium is the ratio of the object's speed relative to the speed of sound through the same medium. So mach 20, in air, for example, is much lower than mach 20 in steel because sound travels slower in air than it does in steel/

Answer 3

That's a tough question to answer, because the speed of sound depends on altitude,
and you haven't specified any.

Mach 20 = 20 times the speed of sound.

At sea level:

Speed of sound = 343 meters per second.

Mach 20 = (343 x 20) = 6,860 meters per second
= 4.263 miles per second

= 15,345 miles per hour.

Answer 4

20 meters per second is 44.74 miles per hour.

Answer 5

20 times the speed of sound, which is approximately 768 mph, but depends on the temperature and pressure.

Answer 6

Mach 20 is about 15,224 mph

Answer 7

Mach 20 is roughly 15,342 miles per hour (mph).