Units of measurement
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Kilometer per second (km/s)
Mile per hour (mph)
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Information
Kilometer per second (km/s)
Kilometer per second (km/s) is a unit of speed equal to one kilometer traveled per second. It is used in astronomy and high-speed research.
Mile per hour (mph)
Mile per hour (mph) is a unit of speed equal to one mile traveled per hour. It is used in the United States and the United Kingdom to measure vehicle and aircraft speeds.