How fast is mach 7?

Answer 1

Let's do the math. We know that the speed of sound, also known as mach, is 1,010 feet per second. Six times that equals 6,060 feet per second. So, if we are going 6,060 feet in 1 second, that mean in one hour we can go 21,816,000 feet in one hour. (60*60*6060). Now divide this by 5,280 feet (1 mile) and we have 4,132 MPH.

Answer 2

The Mach number is simply the speed of an object divided by the speed of sound. While the speed of sound varies according to a number of factors, at sea level on a standard day (15C and 29.92 inches) it is 761.2 mph. Mach 6, then, would be 6 times that speed, or 4567.2 mph (at sea level on a standard day).

It is also important to note the velocity changes with the altitude. So, at 20 miles altitude (a reasonable altitude for something going mach 6), the speed for mach 1 is 683.7 mph, resulting in 4102.2 mph when multiplied by 6.

Answer 3

4 567.2423 mph

Answer 4

Mach 7 = 5,328.45 mph

Answer 5

Mach 7 is about 5,190.8 mph

Answer 6

mach 7 is 3850

Answer 7

Approximately 6,036.4 mph

Answer 8

5,370.88 mph

Answer 9

5,140.7 mph