Z-line can refer to: 1  the borders that separate and link sarcomeres within a skeletal muscle. 2  a ban on a user's IP address for the purposes of blocking their access to Internet Relay Chat.3  the gastroesophageal junction that joins the esophagus to the stomach. 4  Z, a New York City Subway service.-line can refer to: 1  the borders that separate and link sarcomeres within a skeletal muscle. 2  a ban on a user's IP address for the purposes of blocking their access to Internet Relay Chat.
If we take another look at the Mach 1 vs. altitude tables already discussed, we see that the speed of sound at 30,000 ft is 678.2 miles per hour. All we have to do is multiply this value by 3 to determine the speed of a vehicle traveling Mach 3 at 30,000 ft in miles per hour. The answer is 2,035 mph.ach number: Mach number is a quantity that defines how quickly a vehicle travels with respect to the speed of sound. The Mach number (M) is simply the ratio of the vehicle's velocity (V) divided by the speed of sound at that altitude (a).
A distance of one international mile or 1 760 international yards or exactly 1609.344 meters travelled in one hour or exactly 3 600 seconds. 1 Mile per hour = 1.60934 kilometers per hour = 0.44704 meters per second (SI base unit). 1 mph = 0.447 04 m/s. 1 Mach Number: The ratio of the speed of an object moving through a fluid to the speed of sound in the same fluid. Under standard conditions at sea level this is roughly 340.29 meters per second for travel through air.