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 (15C) Speed of Sound in Air
04-10-2024, 02:58 AM
Post: #1
 Eddie W. Shore Senior Member Posts: 1,596 Joined: Dec 2013
(15C) Speed of Sound in Air
Formula used:

The speed of sound in air can be approximated by:
c ≈ √( γ * R * T / M)

where:

R = molar gas constant = 8.314 4625 618 153 J/(K * mol)
R = 8.314 4625 618 153 (kg * m^2)/(s^2 * K * mol)

M = molar mass of air = 0.02897 kg/mol

γ = adiabatic index of air = 1.4

C ≈ 20.04503702 * √T ≈ 331.2893427 * √((°C + 273.15) / 273.15)

Instructions:

To calculate the speed of sound when the temperature is in Fahrenheit (°F), press [ f ] { A } or [ GSB ] { A } [ R/S ].

To calculate the speed of sound when the temperature is in Celsius (°C), press [ f ] { B } or [ GSB ] { B } [ R/S ].

To calculate the speed of sound when the temperature is in Kevin (K), press [ f ] { C } or [ GSB ] { C } [ R/S ].

Code:
Code:
 Step ; Key Code ; Key 001 ; 42, 21, 11 ; LBL A 002 ; 3 ; 3 003 ; 2 ; 2 004 ; 30 ; - 005 ; 5 ; 5 006 ; 20 ; × 007 ; 9 ; 9 008 ; 10 ; ÷ 009 ; 42, 22, 12 ; LBL B 010 ; 2 ; 2 011 ; 7 ; 7 012 ; 3 ; 3 013 ; 48 ; . 014 ; 1 ; 1 015 ; 5 ; 5 016 ; 40 ; + 017 ; 42, 22, 13 ; LBL C 018 ; 11 ; √ 019 ; 2 ; 2 020 ; 0 ; 0 021 ; 48 ; . 022 ; 0 ; 0 023 ; 4 ; 4 024 ; 5 ; 5 025 ; 0 ; 0 026 ; 3 ; 3 027 ; 7 ; 7 028 ; 0 ; 0 029 ; 2 ; 2 030 ; 20 ; × 031 ; 36 ; ENTER 032 ; 36 ; ENTER 033 ; 2 ; 2 034 ; 48 ; . 035 ; 2 ; 2 036 ; 3 ; 3 037 ; 6 ; 6 038 ; 9 ; 9 039 ; 3 ; 3 040 ; 6 ; 6 041 ; 20 ; × 042 ; 34 ; X<>Y 043 ; 43, 32 ; RTN

Examples:

68 °F: 68 [ f ] { A } -> 343.20358 m/s, 767.72445 mph
35 °C: 35 [ f ] { B } -> 351.87462 m/s, 787.83024 mph
280 K: 280 [ f ] { C } -> 335.41762 m/s, 750.30776 mph

Source

“Speed of Sound” Wikipedia. Last Edited March 27, 2024. https://en.wikipedia.org/wiki/Speed_of_sound Retrieved April 7, 2024
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 Messages In This Thread (15C) Speed of Sound in Air - Eddie W. Shore - 04-10-2024 02:58 AM RE: (15C) Speed of Sound in Air - Gil - 04-11-2024, 01:26 PM

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