vonstout
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50yrpatsfan":3vgcc0o1 said:GoPatsSB49":3vgcc0o1 said:Yep. I'm right with you there brother. I'm waiting on the facts though especially concerning the real pressure level of the balls. I gotta head out, talk to you guys laterbmorepunk":3vgcc0o1 said:GoPatsSB49":3vgcc0o1 said:I hope you guys are his adamant when the investigation turns out empty and that there is no proof the Patriots went and deflated the football after the referees inspected them. Even if Brady asks the ball boys to deflate it to 10.0 PSI so what? If the referees inspect it and its too low, they'll inflate it (or they should) to a legal level. It's what happened AFTER the balls were inspected that concerns me the most. If the referees 100% guarantee the balls were in legal range and they somehow managed to drop beyond a reasonable amount due to the weather, then I'll be skeptical. Right now it's just a bunch of hearsay and washed up, angry players (and fans from a team that lost a Super Bowl 13 years ago but still can't get over it) looking for any excuse they can to discredit the Patriots
The weather cannot scientifically be responsible for balls at 12.5 psi dropping to 10.5 psi (if 2 psi difference is to be believed). This is a simple calculation done with Guy-Lussac's law and I did it in another thread. If the balls were filled and temperature stable at 72 degrees F, it would require them to be temperature stable at -13 F to make that difference. If it was 40 degrees F, it only drops the temperature 0.7 degrees.
If Brady was lying at his press conference he is a terrible liar. You're supposed to only answer enough to make it sound legitimate, not make a ton of statements which sound conflicting.
I'm not a scientist, but got this from another board. Any scientists in the crowd care to comment on this?
PV=nRT is the ideal gas law.
p=pressure In units of atmospheres.
v equals volume
n is number of moles or Advacados number times molecules
R is a gas constant
T is temperature in Kelvin.
For a football with air in it we can say the volume and the n and the R stays the same for the sake of the following.
So the question I am posing is how does P change with temperature.
Say the balls were inflated to 12 psi-so p =26.2 psi. 26.2=14.2(one atmosphere) +12.
and was done at 70 degrees fareinheit whitch equals 294 degrees kelvin.
The 26.2 psi equals 1.85 atmospheres which equals 26.2/14.2. One atmosphere pressure equals 14.2 psi.
Since we have so many constants it's basically a direct correlation between p and t.
So a 30 degree fareinheit change in temp equals 277 degrees kelvin.
There pressure when colder goes to 277/294 times 1.85 atmospheres which equals 10.5 psi.
It's why Aaron Rodgers wants a higher inflation. The nfl has been unfair to the packers
This gives the answer to your question
http://www.boston.com/sports/football/p ... story.html