NFL 2014

[Road Guy]

I'm sure many of y'all have already seen this but this had me cracking up

 

[MA_PE]

We've gone from "first world problems" to "first world crisis"

 

[roadwreck]

https://www.youtube.com/watch?v=vd3D2gsPUR0

 

[Road Guy]

I just read the funniest quote from Belichick "I have never in my professional career talk to a player or coach about football air pressure"

 

[MA_PE]

I just read the funniest quote from Belichick "I have never in my professional career talk to a player or coach about football air pressure"

I guess I don't see the humor so much as I see it's likely quite true. I can't see this as being a hot topic for coaches.

 

[Road Guy]

Funny like I imagined him saying to himself " this is the dumbest thing I have ever had to say "

It's on the front page of the USA today and I laughed out loud when I read it ..,

 

[Porter_]

Cialis

Haha I sent this to a buddy of mine. Just fantastic.

 

[Dexman PE PMP]

If the Pats win the Super Bowl:

 

[envirotex]

Why Tom Brady doesn't doesn't really care.

View attachment 7101

 

[Road Guy]

Ellen- are you smoking again?

 

[knight1fox3]

No matter who wins, just remember who's name is on the trophy and who he coached/came from.

 

[Road Guy]

This is watch worthy! Especially the last minute...

http://youtu.be/2svKSuNk0Dk

 

[matt267 PE]

yeah that's a constant volume process. i don't see how the volume would change much (excessive Gronk spiking!). anyway, scenario 2 (!) which i think is clearly what happened:

Belichick inflated them in a sauna, NFL tested in a meat locker:

P1: 12.5 psi

T1: 100 F

T2: 0 F

P2: 10.3 psi

there is is. there's that 2 psi. Belichick needs to use this to clear his good name.

I think the volume of the air bladder could change quite a bit. Isn't it just made of rubber?

Edit:

But I agree, it just don't look right.

not sure where inflation of a football falls (constant volume, isentropic, etc.) but for the sake of jockying around on a forum i figured constant volume was good enough. my thought was you could inflate that thing to 30 psi, and yeah you'd see some increase in volume, but a relatively negligible amount. especially when you consider we're really only talking about a range of +/- 2 psi.

*nerdy high-five*

did you convert the pressure to abs before running your numbers?

 

[Dexman PE PMP]

 

[matt267 PE]

 

[NJmike PE]

 

[Porter_]

did you convert the pressure to abs before running your numbers?

you don't need to, we're comparing gauge pressure to gauge pressure. it's just a simple ratio for a constant volume process: P2 = P1(T2/T1). you have to use abs temp though (Rankine)

 

[matt267 PE]

did you convert the pressure to abs before running your numbers?

you don't need to, we're comparing gauge pressure to gauge pressure. it's just a simple ratio for a constant volume process: P2 = P1(T2/T1). you have to use abs temp though (Rankine)

I think pressure should be in absolute as is temp.

http://www.engineeringtoolbox.com/ideal-gas-law-d_157.html

http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/idegas.html

 

[Porter_]

I think pressure should be in absolute as is temp.


http://www.engineeringtoolbox.com/ideal-gas-law-d_157.html

http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/idegas.html

ah you are correct sir and that does affect the numbers. it's all moot though since the balls were tested at room temp.

 

[Road Guy]