OT: Football "Physics"

That's not right either. If the pressure inside the ball was only 12.5 PSI it would look more like a warped pancake. The formula uses absolute pressure, not relative. You need to add in the ambient air pressure to get absolute pressure, do the math and then subtract ambient back out before you compare to the starting relative pressure.

Keep in mind that ambient will vary with altitude and less so with weather conditions. Denver average pressure is about 85% of sea level air pressure. 14.5 psi at sea level and 12 at Denver... not that they were playing in Denver, but the proper ambient pressure needs to be considered when you do the math.

Nice in what way? He completely messed up the equation by using the wrong pressure and once the ball is inflated enough for the bladder to fill the ball, it is no longer very elastic since the size of the ball will change very, very little.

I see that someone got the math right at least.

defeat-de

The calculation should be from absolutes.

This should be able to be extrapolated upon real world gauged readings.

N2 for tires is comforting if you find yourself having to use a tire inflator can sometime. Since the Freon ban, they're pressurized with butane.

Cheers

Phil Hobbs

My, that was a HOT kick...

Kahn Academy video on deflategate (8:56) Spoiler: 5% drop in temperature, 7% drop in pressure.

-- Jeff Liebermann snipped-for-privacy@cruzio.com