Posted by **jeff** on Sunday, April 15, 2012 at 6:33pm.

find the speed of sound (in m/s) at -35°C at 1 atm pressure in dry air

- physics please help! -
**drwls**, Sunday, April 15, 2012 at 7:34pm
There are many websites online provide the speed of sound in air as a function of temperature.

Try this one:

http://www.sengpielaudio.com/calculator-speedsound.htm

The most accurate formula is

Speed of sound = sqrt[(gamma)*R*T]

where T is the Kelvin temperatuere and gamma is the specific heat ratio, which is 1.4 for dry air. R' is the molar gas constant divided by the molecular weight of air .

- physics please help! -
**jeff**, Sunday, April 15, 2012 at 7:42pm
thank you!

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