Mach no. is dependant on ambient air temp which is associated with a given altitude. As one ascends the temp drops so does the mach no. Eg. In a standard atmosphere (ISA - international std atmosphere) sea level temp is 15 degrees C or 59 degrees F. Temp decreases at 2 degrees celcius per 1000' therefore for example, in a standard atmosphere the temp at say 30000' would be: 15C at 0' -45C at 30000' Plug that into the equation to find the Local Speed of Sound (LSS) which is: LSS = 38.945 (square root of)/ Outside air temp + Absolute temp being 273A or 273K LSS = 38.945 x 228 LSS = 588 kts at 30000' So if one is doing 480knots at 30000' on a standard, day they are doing 480/588 = Mach0.82
Generally speaking, the higher you are in altitude, the lower the temperature.
Square root of temperature is directly propotinal to sound velocity.Mach number decrease with increase in temperature.
Mach No at throat = 1.0
TRUE
Mach is a non standard unit based on the speed of sound through the medium, Mach 1 is the speed of sound, and 0.92 Mach is 92% the speed of sound which is approximately 313.0668 m / s or 1127.04048 km/h or 700.310487 mph.
temperature does affect the bounce of a ball!
A sonic boom is as fast as/faster than the speed of sound. It is also known as Mach 1)It varies with temperature. At sea level on a "standard day," the temperature is 59°F, and Mach 1 is approximately 761 mph.As the altitude increases, the temperature and speed of sound both decrease until about 36,000 feet, after which the temperature remains steady until about 60,000 feet. Within that 36,000-60,000 foot range, Mach 1 is about 661 mph. Because of the variation, it is possible for an airplane flying supersonic at high altitude to be slower than a subsonic flight at sea level.
Critical Mach Number has nothing (directly) to do with altitude. Mach Number has everything to do Temperature,
the Mach number
Ernst Mach .
The Mach number
Mach is the speed of sound in that medium, and is known as Mach 1. It will vary according to pressure and temperature. [More correctly, it is the dimensionless number relating the speed of an object to that of sound in that medium.] Mach does not have units associated with it, such as mph or kmph.
'Mach ' is the speed of sound. This depends on air pressure and temperature. On a median day at sea level this is normally 761 mph. That figure can vary if air conditions are changed, but based on this common number, mach 4.5 is 3,324 mph.
Mach Punch is not a TM so therefore it does not have a TM number.
Lower critical mach number may be defined as the highest subsonic mach number below which the entire flow over it is subsonic. vijayaprakaash
The Mach number for the speed of an object travelling through a particular medium is the ratio of the object's speed relative to the speed of sound through the same medium. The speed of sound through any medium depends on the nature and density of the medium and, as a result, so does the Mach number. In air, the Mach ratio is mostly dependent on temperature and humidity and, to a lesser extent, on altitude. Generally, Mach 1 (in air, at standard sea level conditions, and at 15 deg C) is approx 1223 kmph. So 3400 kmph would be approx 2.8 Mach. But 3400 kmph in water would be a very much lower Mach number.
Mach number is dependent on a number of factors. Factors such as air density or altitude will change the Mach number. At approximatively 45 000 ft Mach 0.85 =289.2361 m/s = 1041.25 km/h = 647.0028 mph
1294.04 miles per hour but it is dependent on temperature and atmospheric composition, Mach l is not a constant
Mach No at throat = 1.0