Velocity Metric system(속도)mach 1 (Mach)660.907127 kn (Knot)760.558339 mi/h (Mile per hour)0.211266 mi/s (Mile per second)4015748.03 ft/h (Feet per hour)1115.48556 ft/s (Feet per second)48188976.4 in/h (Inch per hour)13385.8268 in/s (Inch per second)1224 km/h (Kilometer per hou...