PV=nRT
God, I actually remember something useful!
My work's illegal, but at least it's honest.
Mal ,'Shindig'
Natter 64: Yes, we still need you
Off-topic discussion. Wanna talk about corsets, duct tape, or physics? This is the place. Detailed discussion of any current-season TV must be whitefonted.
sarameg - Dec 29, 2009 7:54:36 am PST #27844 of 30001
Hil R. - Dec 29, 2009 7:54:53 am PST #27845 of 30001
Sometimes I think I might just move up to Vermont, open a bookstore or a vegan restaurant. Adam Schlesinger, z''l
How much would the tire pressure of my bike drop (in %) when the temperature of the air goes from 70 degrees to 10 degrees?
It's PV=nRT, right?
-t - Dec 29, 2009 8:01:59 am PST #27846 of 30001
I am a woman of various inclinations and only some of the time are they to burn everything down in frustration
Who wants to do a physics problem for me?
I do, I do!
PV=nRT
Assuming volume stays constant (which it won't , really, but let's assume it anyway...) P1/T1=nR/V=P2/T2 so P1/294=P2/260 [converting to Kelvin], P2/P1=260/294=0.884
So about 12%
tommyrot - Dec 29, 2009 8:06:26 am PST #27847 of 30001
Sir, it's not an offence to let your cat eat your bacon. Okay? And we don't arrest cats, I'm very sorry.
Assuming volume stays constant
Yeah, that's what I was going to do...
So about 12%
Cool! Thanks.
-t - Dec 29, 2009 8:08:49 am PST #27848 of 30001
I am a woman of various inclinations and only some of the time are they to burn everything down in frustration
You're welcome! I managed to have to learn that little bit of thermodynamics 3 times in college (4 if you count dive training), so it's always fun to be able to put it to use.
tommyrot - Dec 29, 2009 8:13:59 am PST #27849 of 30001
Sir, it's not an offence to let your cat eat your bacon. Okay? And we don't arrest cats, I'm very sorry.
Anyway, my bike tire pressure is a little on the low side at 70 degrees, so perhaps I wasn't crazy when I thought they were noticeably low on the ride here.
tommyrot - Dec 29, 2009 8:16:08 am PST #27850 of 30001
Sir, it's not an offence to let your cat eat your bacon. Okay? And we don't arrest cats, I'm very sorry.
From Slate: In 2010, We Will Live on the Moon
Remembering the giddy futurism of Omni magazine.
I loved Omni, so I found this interesting ....
Tom Scola - Dec 29, 2009 8:20:11 am PST #27851 of 30001
Remember that the frontier of the Rebellion is everywhere. And even the smallest act of insurrection pushes our lines forward.
Omni folded because we didn't need to read about the future any more -- we're living in it.
Sue - Dec 29, 2009 8:21:18 am PST #27852 of 30001
hip deep in pie
I am allegedly working from home, but there wasn't anything I could bring home. I guess I should at least check my email.
Jesse - Dec 29, 2009 8:23:19 am PST #27853 of 30001
Sometimes I trip on how happy we could be.
I'm thinking about taking a second shower to warm up. Or getting back in bed. I've sent two or three emails, so that seems like enough work...