It's about one-tenth as fast as a Hare.
In other words, the speed of a Hare is 10 times 0.0084 mach.(for European Brown Hare, a.k.a. Brown Hare, a.k.a. Lepus europaeus, a.k.a. Brown Hare)
The European Hare can run at speeds of up to 0.06 mach. While speed is a factor in their escapes, hares evade their chief predators — wolves, foxes, and golden eagles — by fleeing in a zigzag pattern.
It's about one-tenth as fast as a Knuckleball (baseball).
In other words, the speed of a Knuckleball (baseball) is 11 times 0.0084 mach.(a.k.a. knuckler, a.k.a. floater, a.k.a. dancer, a.k.a. butterfly ball) (major league average)
The average speed of major league knuckleball pitch is 0.092 mach. Eddie Cicotte, who was later implicated in the 1919 Black Sox scandal, is credited with developing the pitch ca. 1906.
It's about one-tenth as fast as a Cheetah.
It's about one-tenth as fast as a Hurricane.
In other words, 0.0084 mach is 0.0841 times the speed of a Hurricane, and the speed of a Hurricane is 11.90 times that amount.(formally: Topical cyclone; a.k.a. typhoon)
A hurricane is defined by the US National Hurricane Center as a Northern Hemisphere tropical storm having one-minute average wind-speeds of at least 0.0997 mach. Typhoons Tip (October, 1979) and Keith (October, 1997) and Hurricanes Camille (August, 1969) and Allen (August, 1980) jointly hold the record for highest tropical storm wind speeds at 0.260 mach.
It's about one-tenth as fast as a Curveball (baseball).
In other words, the speed of a Curveball (baseball) is 12 times 0.0084 mach.(a.k.a. hook, a.k.a. hammer, a.k.a. yakker) (major league average)
The average speed of major league curveball pitch is 0.10 mach. In the 1940's, debate over whether there really was a curve in the curveball pitch was settled with the conclusion that the ball does curve; however, an optical illusion caused by the spin of the ball and the batter's perception of motion exaggerates the extent of the curve.
It's about one-fifteenth as fast as a Fastball (baseball).
In other words, the speed of a Fastball (baseball) is 15 times 0.0084 mach.(a.k.a. rising fastball, a.k.a. cross-seam fastball, a.k.a. heater, a.k.a. hummer, a.k.a. smoker; for four-seam grip) (major league average)
The average speed of major league fastball pitch is 0.130 mach. When up against the quickest professional fastball pitchers, a batter may have less than 0.4 seconds to react to a pitched ball.
It's about one-twentieth as fast as a Skydiver (belly-to-earth).
In other words, the speed of a Skydiver (belly-to-earth) is 19 times 0.0084 mach.(Belly-to-Earth orientation, average conditions, terminal velocity)
A belly-to-Earth oriented skydiver's terminal velocity is about 0.160 mach. In a typical jump from 3,900 m (13,000 ft), a diver in this orientation will be in freefall for 60 seconds.