[DOC] [TLE] Mach number - Wikipedia [PAR] In fluid dynamics, the Mach number (M or Ma) is a dimensionless quantity 
representing the ratio of flow velocity past a boundary to the local speed of sound
. .... At transonic speeds, the flow field around the object includes both sub- and ... 
This abrupt pressure difference, called a shock wave, spreads backward and 
outward... [DOC] [TLE] Speed of sound - Wikipedia [PAR] The speed of sound is the distance travelled per unit time by a sound wave as it 
propagates ... These different types of waves in solids usually travel at different 
speeds, as exhibited in seismology. The speed of a ... The ratio of the speed of an 
object to the speed of sound in the fluid is called the object's Mach number. 
Objects... [DOC] [TLE] Mach Number - NASA [PAR] Mach number equals object speed divided by speed of sound. ... this speed ratio, 
aerodynamicists have designated it with a special parameter called the ... the 
speed of sound in the gas and the speed of sound depends on the type of gas 
and... [DOC] [TLE] Speed of Sound - NASA [PAR] The speed of sound in air depends on the type of gas and the temperature of the 
gas. ... As an object moves through the atmosphere, the air is disturbed and the ... 
call the ratio of the aircraft's speed to the speed of sound the Mach number,... [DOC] [TLE] Mach number - definition of Mach number by The Free Dictionary [PAR] Abbr. M The ratio of the speed of an object to the speed of sound in the ... For 
example, an aircraft flying through air at twice the speed of sound has a Mach 
number ... a Shadow 200 with that type of acceleration would reach a Mach 
number of... [DOC] [TLE] Shock Waves  The Physics Hypertextbook [PAR] The ratio of the speed of a moving object (v) to the speed of sound (c) in a fluid is 
known as the Mach number in honor of Ernst Mach (18381916), the Moravian... [DOC] [TLE] Speed & Velocity  The Physics Hypertextbook [PAR] In order to calculate the speed of an object we must know how far it's gone and 
how long it took to get there. ... Unless you live in a world where cars have some 
kind of exceptional cruise control .... In this field, the speed of an object is often 
measured relative to the speed of sound. This ratio is known as the Mach number
. [DOC] [TLE] How Fast is Mach 1 - Universe Today [PAR] Apr 26, 2016 ... The speed of sound is one of the key speed barriers in physics. ... The truth is that 
the Mach number is a ratio rather than an actual direct measurement of speed. ... 
formula for Mach speed numbers is the speed of the object breaking the sound ... 
[/caption] The speed of sound -- historically called the 'sound... [DOC] [TLE] What Is the Speed of Sound? | WIRED [PAR] Oct 17, 2012 ... That is just barely over the speed of sound at 340 m/s. .... of Mach number as the 
ratio of the speed of an object to the local speed of sound. [DOC] [TLE] Cactus2000 : Speed of sound and Mach number [PAR] Aug 11, 2004 ... The speed of sound c in a gas depends on the kind of gas and on the 
temperature. ... The Mach number is defined as the ratio of the speed of an object 
... number of a flying object or its speed, if the Mach number is known. [DOC] [TLE] Speed of sound in air temperature barometric pressure calculator ... [PAR] Speed of sound temperature air no barometric pressure calculation temperature 
changing temp air pressure air ... Notice: The ratio p_ /  (static air pressure to air 
density) is really always constant. .... Mach is commonly used to represent an 
object's speed, such as an aircraft ... More than Mach number 5 is called 
hypersonic. [DOC] [TLE] Speed of Sound, Doppler Effect and the Sonic Boom! - Digital Illusions [PAR] The speed of a sound wave in air depends upon the properties of the air, ....

Question: The ratio of the speed of an object to the speed of sound is known as this type of number
Answer: Mach Number