Meters Per Hour to Mach
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1 meter per hour (m/h) = 8.16327E-07 mach (M). Meter Per Hour (m/h) is a unit of Speed used in Metric system. Mach (M) is a unit of Speed used in Metric system.

Meters Per Hour

Definition of Meters Per Hour

Meters per hour (m/h) is a unit of speed that measures how fast something is moving in terms of meters per unit of time. It is a metric unit that is derived from the base unit of length, the meter, and the base unit of time, the hour. It is rarely used however, as the units of meters per second and kilometers per hour are considered sufficient for most situations.

One meter per hour is equal to 0.00027777777777778 meters per second, or 0.001 kilometers per hour. It can also be converted to other units of speed, such as feet per second, miles per hour, or knots, by using appropriate conversion factors.

How to Convert Meters Per Hour

To convert meters per hour to other units of speed, we need to multiply or divide by the corresponding conversion factors. For example, to convert meters per hour to feet per second, we need to multiply by 0.0009113444153, since there are 0.0009113444153 feet in one meter. To convert meters per hour to kilometers per hour, we need to multiply by 0.001, since there are 0.001 kilometers in one meter.

Here are some examples of how to convert meters per hour to other units of length in the US Standard system and the SI system:

• To convert 10 m/h to feet per second (fps), we multiply by 0.0009113444153: 10 m/h x 0.0009113444153 = 0.009113444153 fps
• To convert 20 m/h to miles per hour (mph), we multiply by 0.0006213711922, since there are 0.0006213711922 miles in one meter: 20 m/h x 0.0006213711922 = 0.012427423844 mph
• To convert 30 m/h to knots (kn), we multiply by 0.0005399568035, since there are 0.0005399568035 nautical miles in one meter: 30 m/h x 0.0005399568035 = 0.016198704105 kn
• To convert 40 m/h to meters per second (m/s), we divide by 3600, since there are 3600 seconds in one hour: 40 m/h / 3600 = 0.011111111111 m/s
• To convert 50 m/h to meters per minute (m/min), we divide by 60, since there are 60 minutes in one hour: 50 m/h / 60 = 0.833333333333 m/min
• To convert 60 m/h to centimeters per second (cm/s), we multiply by 100, since there are 100 centimeters in one meter, and divide by 3600: 60 m/h x 100 / 3600 = 1.666666666667 cm/s

Where Meters Per Hour Are Used

Meters per hour are mainly used for measuring very slow speeds or velocities of objects or phenomena that move in terms of meters per unit of time. They are often used in scientific fields such as geology, biology, astronomy, and physics, where the speed or velocity of an object or phenomenon is very small compared to the usual units of speed.

For example, a glacier may have a speed of a few meters per hour, which means that it moves a few meters in one hour. A snail may have a speed of up to 47 meters per hour, which means that it can travel up to 47 meters in one hour. A planet may have an orbital velocity of thousands of meters per hour, which means that it covers thousands of meters along its orbit in one hour.

Meters per hour are also used in some other fields where the speed or velocity of an object or phenomenon is measured in terms of meters per unit of time.

History of Meters Per Hour

The origin of meters per hour as a unit of speed can be traced back to the development of the metric system and the meter as a unit of length in the late eighteenth century. The meter was defined as one ten-millionth of the distance from the equator to the North Pole along a meridian through Paris.

The term meter first appeared in English in 1797, but it was not until later in the early nineteenth century that the use of meters per hour became more common; before that, other units such as feet per hour or leagues per hour were preferred for expressing speed.

Meters per hour have been used ever since as a standard unit of speed for measuring very slow speeds or velocities of objects or phenomena that move in terms of meters per unit of time. They have also been adopted by some international organizations and conventions, such as the International System of Units and the International Astronomical Union.

Example Conversions of Meters Per Hour to Other Units

Here are some examples of how to convert meters per hour to other units of speed, using the conversion factors given above:

• To convert 100 m/h to feet per second, we multiply by 0.0009113444153: 100 m/h x 0.0009113444153 = 0.09113444153 fps
• To convert 200 m/h to miles per hour, we multiply by 0.0006213711922: 200 m/h x 0.0006213711922 = 0.12427423884 mph
• To convert 300 m/h to knots, we multiply by 0.0005399568035: 300 m/h x 0.0005399568035 = 0.16198704105 kn
• To convert 400 m/h to meters per second, we divide by 3600: 400 m/h / 3600 = 0.11111111111 m/s
• To convert 500 m/h to meters per minute, we divide by 60: 500 m/h / 60 = 8.33333333333 m/min
• To convert 600 m/h to centimeters per second, we multiply by 100 and divide by 3600: 600 m/h x 100 / 3600 = 16.66666666667 cm/s
• To convert 700 m/h to millimeters per minute, we multiply by 1000, since there are 1000 millimeters in one meter, and divide by 60: 700 m/h x 1000 / 60 = 11666.666666667 mm/min

Mach number

Definition of Mach

Mach, 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 Mach

To 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:

• To convert 1 M to meters per second (m/s), we multiply by 340: 1 M x 340 = 340 m/s
• To convert 2 M to kilometers per hour (km/h), we multiply by 340 and by 3.6: 2 M x 340 x 3.6 = 2448 km/h
• To convert 3 M to miles per hour (mph), we multiply by 340 and by 2.2369362920544, since there are 2.2369362920544 miles in one kilometer: 3 M x 340 x 2.2369362920544 = 2285.714285714 mph
• To convert 4 M to feet per second (fps), we multiply by 340 and by 3.2808398950131, since there are 3.2808398950131 feet in one meter: 4 M x 340 x 3.2808398950131 = 4465.306122449 fps
• To convert 5 M to knots (kn), we multiply by 340 and by 1.9438444924406, since there are 1.9438444924406 nautical miles in one kilometer: 5 M x 340 x 1.9438444924406 = 3316.326530612 kn
• To convert 6 M to centimeters per second (cm/s), we multiply by 340 and by 100, since there are 100 centimeters in one meter: 6 M x 340 x 100 = 204000 cm/s

Where Mach Is Used

Mach 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:

• In aerodynamics and aeronautics, mach is used to measure the speed and performance of aircraft, rockets, missiles, and other flying vehicles, as well as the effects of air resistance, drag, lift, and thrust on them.
• In acoustics and sound engineering, mach is used to measure the intensity and frequency of sound waves, as well as the effects of reflection, refraction, diffraction, interference, and Doppler shift on them.
• In meteorology and climatology, mach is used to measure the speed and direction of wind, storms, hurricanes, tornadoes, and other weather phenomena, as well as the effects of temperature, pressure, humidity, and density on them.

History of Mach

The 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 German-American 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 human-made object to break the sound barrier was a rocket-powered plane called Bell X-1 piloted by Chuck Yeager in October 1947. He achieved a speed of about Mach 1.06 at an altitude of 13,000 meters.
The first human to travel faster than sound was Soviet cosmonaut Yuri Gagarin, who orbited the Earth at a speed of about Mach 25 in April 1961.
The fastest manned aircraft ever flown was the North American X-15, which reached a speed of about Mach 6.7 in October 1967.

The fastest unmanned aircraft ever flown was the NASA X-43A, which reached a speed of about Mach 9.6 in November 2004.

Example Conversions of Mach to Other Units

Here are some examples of how to convert mach to other units of speed, using the conversion factors given above:

• To convert 1 M to meters per second, we multiply by 340: 1 M x 340 = 340 m/s
• To convert 2 M to kilometers per hour, we multiply by 340 and by 3.6: 2 M x 340 x 3.6 = 2448 km/h
• To convert 3 M to miles per hour, we multiply by 340 and by 2.2369362920544: 3 M x 340 x 2.2369362920544 = 2285.714285714 mph
• To convert 4 M to feet per second, we multiply by 340 and by 3.2808398950131: 4 M x 340 x 3.2808398950131 = 4465.306122449 fps
• To convert 5 M to knots, we multiply by 340 and by 1.9438444924406: 5 M x 340 x 1.9438444924406 = 3316.326530612 kn
• To convert 6 M to centimeters per second, we multiply by 340 and by 100: 6 M x 340 x 100 = 204000 cm/s
• To convert 7 M to millimeters per minute, we multiply by 340 and by 1000, since there are 1000 millimeters in one meter, and multiply by 60, since there are 60 minutes in one hour: 7 M x 340 x 1000 x 60 = 142800000 mm/min