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At 01:56 PM 4/19/97 -0400, Mathieu Dubreuil wrote:Lew Haddad
Hello,For atmospheric air, speed of sound is a function essentially of temperature
Students of mine (HS) are exploring the way to simulate a sonic boom at
low atmospheric pressure. The argument behind it is since the speed of
sound decrease with density, a sonic boom might be easier to simulate in
a lower pressure system.
We've look at one formula that gives a relationship between temperature,
density and speed of sound in air but couldn't find one with Pressure,
density and speed.
We've hit a wall...
Can the project be done ?
What is the relationship between Pressure-density-speed ?
What is the meaning of the 1.4 constant of air in the temp-density-speed
equation ?
Thanks,
Mathieu Dubreuil
science teacher
Poite-Claire high school
Quebec
alone. The usual formulae are a fertile source of confusion.
I'm sure the kids at Pointe-Claire would enjoy making a supersonic
duct. The project was described in a long-ago issue of Scientific American.
I realise that this is not a very helpful cite.
But there is a web site run by the Soc of Amateur Scientists that carries a
pretty well complete searchable index of the Am Scientist columns,
especially its heyday in Stong's time.
A web search should turn this up quickly, or email me.
Regards
brian whatcott <inet@intellisys.net>
Altus OK