#Subsonic speed meters per second how to#

#Subsonic speed meters per second how to#

It’s vital to understanding how to control or predict an object’s behavior in motion with respect to its surrounding medium. With this given set of information and equations, you can now calculate Mach numbers for various situations in different applications. K for dry air), and T is the absolute temperature in Kelvin.Where a is the speed of sound, γ (gamma) is the specific heat ratio or adiabatic index (approximately 1.4 for air), R is the specific gas constant (around 287 J/kg

In gas dynamics and aerodynamics, we use the ideal gas law and some basic properties of fluids to derive an equation for calculating the speed of sound: Hypersonic: M ≥ 5, the object’s speed is more than five times the speed of sound.Īs mentioned earlier, the speed of sound depends on factors such as temperature, pressure, and humidity. Subsonic: M 1 but less than 5, the object’s speed exceeds the speed of sound.Ĥ. These ranges are designated as subsonic, transonic, supersonic, and hypersonic.ġ. There are different ranges depending on an object’s speed relative to the speed of sound. This plane would be flying with a subsonic or less than sonic velocity since its Mach number is less than one. Where M is the Mach number, v is the object’s speed, and a is the speed of sound in the medium.įor example, if a plane is flying at 305 meters per second (m/s) through air with a speed of sound of 343 m/s, its Mach number would be: The formula for calculating the Mach number (M) can be expressed as: In air at sea level and at 20☌ (68☏), the speed of sound is approximately 343 m/s. Speed of Sound: The speed of sound (a) depends on temperature, pressure, and humidity in the medium through which it travels. Speed: The speed (v) refers to an object’s velocity (its rate of movement through space), expressed in meters per second (m/s).Ģ. In this article, we will discuss how to calculate the Mach number for different scenarios.īefore we dive into the calculation, it’s essential to understand two primary aspects of the Mach number:ġ. The concept of Mach number is invaluable in various fields such as aeronautics, astronautics, and fluid mechanics and is used to analyze the various characteristics of moving objects like airplanes, rockets, and even blades in a wind turbine. It is named after the Austrian physicist Ernst Mach, who was a pioneer in the field of aerodynamics. How to Convert Meter/second to Foot/secondġ5 m/s = 15 × 3.280839895 ft/s = 49.The Mach number is a dimensionless quantity that represents the ratio of an object’s speed to the speed of sound in the surrounding medium. Meter/second to Foot/second Conversion Table Meter/second The foot per second is also a relatively small unit of measurement making it difficult for use on a larger scale. The meter per second is the preferred measurement in scientific contexts, and either miles per hour or kilometers per hour are more common in everyday use for describing road speeds. History/origin: The foot per second is a measurement based in systems like the imperial and United States customary systems of units, where the foot is the preferred unit of length.Ĭurrent use: The foot per second is not widely used. It is also equal to 0.592484 knots and 0.681818 miles per hour.

It is equal to 0.3048 meters per second, the International System of Units (SI) derived unit of speed and velocity. Feet per secondĭefinition: A foot per second (symbol: ft/s) is a unit of speed and velocity that expresses the time taken in seconds to travel a specific distance in feet.

The kilometer per hour, and in some countries the mile per hour, are the preferred measurement of road speed. The kilometer per second is also used when meters per second is too slow a measurement, such as in astronomical measurements and higher velocities. Although this unit has seen some support, particularly in Germany, the unit benz was rejected as the SI unit of velocity.Ĭurrent use: As the SI derived unit of speed and velocity, the meter per second and its multiples are used widely within scientific contexts. The unit benz, named after Karl Benz, a German engine designer and automobile engineer (and founder of the company that would eventually merge and produce the Mercedez-Benz line of automobiles) has been proposed as a named for one meter per second. History/origin: The meter per second is a unit that was derived based on the SI units of meters and seconds. It is equal to exactly 3.6 kilometers per hour, approximately 3.2808 feet per second, and approximately 2.2369 miles per hour. It is defined as the distance traveled in meters divided by the amount of time taken in seconds. Definition: A meter per second (symbol: m/s) is an SI (International System of Units) derived unit of speed and velocity.