The Resonator. When a wave hits the hole, part of it continues into the chamber and part of it is reflected. The wave travels through the chamber, hits the back wall of the muffler and bounces back out of the hole.he resonator is designed to work best in the frequency range where the engine makes the most noise; but even if the frequency is not exactly what the resonator was tuned for, it will still produce some destructive interference.
Although lahars contain at least 40% (by weight) volcanic ash and rock fragmentsâmaking them dense and viscous like wet concreteâthey actually flow faster than clear-water streams. These mudflows can rush down the flanks of a volcano at speeds as great as 40 miles (65 kilometers) per hour and can travel more than 50 miles (80 kilometers). Lahars that contain the most debris (as much as 90%) move the fastest and are the most destructive.
As far as maintaining speed -- the record human Marathon speed is about 12 mph over 26.2 miles (a 4+ minute mile). Winners of competitive sled dog mid-distance races typically run a 3+ minute mile, in races of 25-50 miles.They can go further faster than any top marathon runner.reyhounds can reach speeds of 42 MPH, well, well beyond the reach of the fastest humans who generally clock in somewhere around 20 MPH. But based on a stat I found online (who knows how crdible it is) the average dog runs 19 MPH, which would be about even with humans, if not slower.