Actually, you might be...
Speed of sound in air is only linked to temperature. Speed of sound in other mediums is a whole load more complicated!
Interesting but superficial. Just because the author of this piece says ignore altitude doesn't mean he is literally correct. You ignore altitude because you are using Rho, air pressure. The reason that altitude has an effect is because of the change it has on Rho. If you have already measure Rho then the altitude that Rho is measured at is irrelevent.
If you don't have Rho, and are making a calculation, then you will need the altitude to be able to make it.
http://en.wikipedia.org/wiki/Density_of_air
What Gary said
Sorry, I still don't agree. I can't find any reference to pressure or density (P) being relevant to the speed of sound in air. During my training, I remember being specifically taught that is was purely dependant on temperature.
This page sums it all up quite nicely.
Merchant.
My congratulations on a well reasoned argument , and I concede happily. My training as a surveyor was 30 years ago time has let me remember some points but let me forget others.
SoS varies with altitude, that is a simple fact.
SoS varies with pressure and density, that is a fact.
However I forgot that the relationship between pressure and density is opposite and equal, therefore as one effects the S0S with altitude the other cancels it out. Therefore, as you said, these factors do not come into play.
However the original assertion with I remember well is that SoS varies with altitude is correct due to temperature and humidity calculations. In Europe, IIRC, temp declines 3 degrees per 1000 feet and humidity changes also. This means that, in theory, given constant humidity and temp S0S will remain constant with altitude, while in practice I know of no geographical region where there phenomena could occur
Many thanks, I've enjoyed re-reading this and it's brought back some memories. My thirst for knowledge quenched, I'm off to surf for porn
Last edited by Gary C; 05-06-2008 at 03:09 PM.
seen this clip. would an owner of a fire arms certificate make such a clip?
Looks a bit odd to me.
THE DEER HUNTER
AA S410 .177,
DAYSTATE PH6 .22, Winchester SX2.