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Speed of sound vs altitude6/19/2023 ![]() However, it is primarily and more directly related to molecular speed and thus temperature than it is to anything else. We know that the speed of sound is given by the formula: v Substituting the values in the equation, we get v 0.35 m × 2000 Hz 700 m/s The time taken by the sound wave to travel a distance of 1. ![]() One might also note that the temperature is lower as one ascends primarily because the pressure is lower as one ascends and then conclude that the speed difference is equally attributable to lower pressure (or lower density for that matter). Since molecular speed in a gas is a direct function of average molecular kinetic energy and that is a direct function of temperature, the speed of sound in a gas will also be a function of temperature.Īt the cruise altitude of the Concorde the atmospheric temperature is below that of the standard atmospheric temperature at sea level, so the speed of sound is also lower. Note that the sound speed is found from T, not all that accurate at high altitudes perhaps. Standard Altitude Table for Speed of Sound. If you want to know a multiple of the speed of sound at any particular altitude, simply multiply the value of Mach 1 at the altitude of choice by the desired Mach number. Therefore, the sound wave can not possibly move through the gas at a speed greater than that of the individual molecules themselves, and in fact must move at a lower speed than that due to the random nature of molecular movement. Speed of Sound Equation: v s 643 5 knots If you were to reach Mach 1. A sound wave moving through a gas requires a small scale bulk movement of gas molecules back and forth as pressure at any locations builds or falls. So if you're at sea level, at roughly about 20 degrees Celsius, the speed of sound is 300, so sea level- do a different color, maybe blue for sea level- so if.
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