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“A Reasoned Conviction”
Since: Aug 08
Here was There
#1 Jul 18, 2010
v = 331 m/s +(0.6 m/s/C)•T
The speed of sound is alike on a mountain top as well as at sea level with the same air temperature.
Density of air (air density) ρ = air pressure p /(gas constant R × temperature in Kelvin)
ρ = p / R × T (kg/m³)
The individual gas constant for dry air is R = 287,05 J/kg · K
Joule J = Newton · Meter = N m and T in Kelvin =°C + 273.15
Atmospheric pressure p0 = 101325 Pa = 1013.25 mbar = 1013.25 hPa and R = 287.05J/kg · K
T0 = 273.15 K at 0°C
ρ0 = 101325 p / R (287.05 × 273.15)= 1.2923 kg/m³
T20 = 293.15 K at 20 °C
ρ20 = 101325 p / R (287.05 × 293.15)= 1.2041 kg/m³
The speed of sound c is not the particle velocity v.
The sound velocity is the particle velocity.
The speed of sound is called Mach 1
Mach is commonly used to represent an object's speed, such as an aircraft or a missile, when it is travelling at the speed of sound or at multiples of it.
The speed of sound c is independent of the frequency and the amplitude of the sound wave.
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