

Convert Kilometers Per Second to Mach (km/s to M) ▶ Conversion Table
How to convert1 mach (M) = 0.3403 kilometer per second (km/s). Mach (M) is a unit of Speed used in Metric system. Kilometer Per Second (km/s) is a unit of Speed used in Metric system. Mach numberDefinition of MachMach, commonly denoted M or Ma, is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. It is named after the Austrian physicist and philosopher Ernst Mach, who studied gas dynamics and shock waves. Mach number is used to classify the flow regimes based on the effects of compressibility and shock waves on the flow. How to Convert MachTo convert mach to other units of speed, we need to multiply by the local speed of sound in the medium, which depends on the temperature and pressure of the gas. For example, to convert mach to meters per second, we need to multiply by the speed of sound in air at sea level, which is about 340 m/s. To convert mach to kilometers per hour, we need to multiply by the speed of sound in air at sea level and by 3.6, since there are 3.6 seconds in one hour. Here are some examples of how to convert mach to other units of length in the US Standard system and the SI system:
Where Mach Is UsedMach is used in various fields of science and technology where the speed and direction of movement of objects or phenomena are measured or applied in relation to the speed of sound in the medium. For example:
History of MachThe concept of mach number was first introduced by Swiss engineer Jakob Ackeret in his doctoral thesis in 1929. He proposed it as a convenient way to express the ratio of flow velocity to speed of sound in gas dynamics problems. He also named it after Ernst Mach, who had conducted experiments on supersonic projectiles and shock waves in the late nineteenth century. The term mach number was later popularized by GermanAmerican engineer Theodore von Karman, who used it extensively in his research on aerodynamics and supersonic flight in the early twentieth century. He also established the first supersonic wind tunnel at Caltech in 1939. The first humanmade object to break the sound barrier was a rocketpowered plane called Bell X1 piloted by Chuck Yeager in October 1947. He achieved a speed of about Mach 1.06 at an altitude of 13,000 meters. The fastest unmanned aircraft ever flown was the NASA X43A, which reached a speed of about Mach 9.6 in November 2004. Example Conversions of Mach to Other UnitsHere are some examples of how to convert mach to other units of speed, using the conversion factors given above:
Kilometers per second: A unit of speedKilometers per second (km/s) is a unit of speed or velocity in the International System of Units (SI). It measures how fast an object is moving by calculating the distance traveled in kilometers divided by the time taken in seconds. For example, if a rocket travels 10 kilometers in 5 seconds, its speed is 2 km/s. How to convert kilometers per secondKilometers per second can be converted to other units of speed or velocity by using simple conversion factors. Here are some common units and their conversion factors:
Where kilometers per second are usedKilometers per second are mainly used in astronomy and space science to measure the speed or velocity of celestial bodies and spacecrafts. For example, the Earth orbits the Sun at an average speed of about 30 km/s. The Moon orbits the Earth at an average speed of about 1 km/s. The International Space Station orbits the Earth at an average speed of about 7.66 km/s. The Voyager 1 spacecraft, which is the farthest humanmade object from Earth, travels at a speed of about 17 km/s. The speed of light in a vacuum is about 300000 km/s. Definition of kilometers per secondAccording to the SI definition, one kilometer per second is the speed of a body that covers a distance of one kilometer in a time of one second. Mathematically, it can be expressed as:
where v is the speed or velocity in kilometers per second, s is the distance traveled in kilometers, and t is the time taken in seconds. History of kilometers per secondThe concept of speed or velocity has been studied since ancient times by philosophers and scientists such as Aristotle, Galileo, Newton, etc. The kilometer was originally defined in 1793 by the French Academy of Sciences as one tenmillionth of the distance from the equator to the North Pole along a meridian through Paris. The second was originally defined in terms of the Earth’s rotation as one eightysix thousand four hundredth of a mean solar day. The combination of these two units resulted in the kilometer per second as a unit of speed or velocity. The kilometer per second was officially adopted as part of the SI system in 1960. Example conversions of kilometers per second to other unitsHere are some examples of converting kilometers per second to other units of speed or velocity:
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