Convert kilometer/hour to Mach (20°C, 1 atm)
Please provide values below to convert kilometer/hour [km/h] to Mach (20°C, 1 atm) [M], or Convert Mach (20°C, 1 atm) to kilometer/hour.
How to Convert Kilometer/hour to Mach (20°c, 1 Atm)
1 km/h = 0.000809847748688047 M
Example: convert 15 km/h to M:
15 km/h = 15 × 0.000809847748688047 M = 0.0121477162303207 M
Kilometer/hour to Mach (20°c, 1 Atm) Conversion Table
| kilometer/hour | Mach (20°C, 1 atm) |
|---|
Kilometer/hour
Kilometer per hour (km/h) is a unit of speed expressing the number of kilometers traveled in one hour.
History/Origin
The km/h unit originated from the metric system, developed in France during the late 18th century, and became widely adopted for measuring speed in transportation and scientific contexts.
Current Use
Km/h is commonly used worldwide to specify vehicle speeds, speed limits, and other applications involving the measurement of speed in everyday life and transportation systems.
Mach (20°c, 1 Atm)
Mach is a unit of speed representing the ratio of an object's speed to the speed of sound in the surrounding medium, typically at 20°C and 1 atm pressure.
History/Origin
Named after physicist Ernst Mach, the Mach number was developed in the early 20th century to describe speeds relative to the speed of sound, especially in aeronautics and fluid dynamics.
Current Use
Mach is widely used in aeronautics and astronautics to express aircraft and spacecraft speeds, particularly in high-speed flight and supersonic travel contexts.