Units of measurement
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Calculations
Foot per second (ft/s)
Mach (Mach)
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Information
Foot per second (ft/s)
Foot per second (ft/s) is a unit of speed equal to one foot traveled per second. It is used in some engineering calculations and physics.
Mach (Mach)
Mach is a unit of speed based on the speed of sound in air. Mach 1 is equal to the speed of sound, which varies with air temperature (approximately 343 m/s at 20°C).