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).
By contrast, typical Pu`u `O`o `a`a (try saying that fast three times) flow advance rates were less than 1/3 mi/hr or 0.15 m/s. The fast `a`a flow on the night of February 1, 1996, advanced from near Pu`u `O`o over Pulama pali at a ripping 2/3 mi/hr, or 0.3 m/s. Pahoehoe flows are even slower than this.Now, lava can flow quite a bit faster than 6 mi/hr, but only in tubes or channels where it is confined and thermally insulated.Like most fluids, lava flows faster if it stays hot. For example, chocolate syrup that's just been in the refrigerator may not flow at all until it is warmed over the stove.ithin the current tube system, lava speeds have been measured up to 23 mi/hr, or 10 m/s. To put these speeds into perspective, let's compare them to typical human running speeds. Athletes can run the 100 yard dash in about 10 seconds, an average speed of 23 mi/hr or 10 m/s.