The thing I don't understand is how mass x distance² / time² ends up being energy, which is force x distance, right?
Anybody can be a prop class clown.
Xander ,'Touched'
Natter 63: Life after PuppyCam
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.
tommyrot - Feb 18, 2009 10:18:56 am PST #6875 of 30000
Sir, it's not an offence to let your cat eat your bacon. Okay? And we don't arrest cats, I'm very sorry.
Tom Scola - Feb 18, 2009 10:21:02 am PST #6876 of 30000
Remember that the frontier of the Rebellion is everywhere. And even the smallest act of insurrection pushes our lines forward.
force × distance is work, not energy.
[edit: WRONG, see my correction below]
tommyrot - Feb 18, 2009 10:22:07 am PST #6877 of 30000
Sir, it's not an offence to let your cat eat your bacon. Okay? And we don't arrest cats, I'm very sorry.
Oh, OK. Then my confusion remains the same in absolute terms - just shifted laterally.
Gudanov - Feb 18, 2009 10:22:22 am PST #6878 of 30000
Coding and Sleeping
How would the 0.25 grams of antimatter only annihilate the Vatican and nowhere else?
Well 0.25 grams of antimatter combined with 0.25 grams of regular matter would produce:
0.5 grams is 0.0005 kg
Using E=mc^2
0.0005 x 300,000,000^2 kg*m^2/s^2
That's
45,000,000,000,000 Joules which is roughly 10kt of TNT
But...
As I understand it, about half of that will be neutrinos which doesn't do anything destructive so about 5kt of actual destruction.
Edit: Shoulda known that I took too long with that.
tommyrot - Feb 18, 2009 10:26:15 am PST #6879 of 30000
Sir, it's not an offence to let your cat eat your bacon. Okay? And we don't arrest cats, I'm very sorry.
I had to do calculations like that in college Chemistry, but I found them confusing even then.
But is Gud's answer the same as Tom's? I forget how many kilotons the Nagasaki bomb was....
Tom Scola - Feb 18, 2009 10:29:16 am PST #6880 of 30000
Remember that the frontier of the Rebellion is everywhere. And even the smallest act of insurrection pushes our lines forward.
I forget how many kilotons the Nagasaki bomb was....
It's in the Wikipedia article I linked to.
1 joule = 1 kg * (m² / s²), which matches the units of m × c².
Gudanov - Feb 18, 2009 10:29:28 am PST #6881 of 30000
Coding and Sleeping
Tom's link says 21kt for Nagasaki so his 1/2 Nagasaki and my 10kt are the same answer.
Matt the Bruins fan - Feb 18, 2009 10:31:29 am PST #6882 of 30000
"I remember when they eventually introduced that drug kingpin who murdered people and smuggled drugs inside snakes and I was like 'Finally. A normal person.'” —RahvinDragand
Fat Man and Little Boy were in the 10-12 kiloton range, weren't they?
eta: Ah, perhaps that was a lowball estimate I heard somewhere.
tommyrot - Feb 18, 2009 10:32:12 am PST #6883 of 30000
Sir, it's not an offence to let your cat eat your bacon. Okay? And we don't arrest cats, I'm very sorry.
Oh. I was just thinking the Nagasaki bomb was more powerful than that.
OK, all is well. You may all resume your non e=mc² activities....
msbelle - Feb 18, 2009 10:32:15 am PST #6884 of 30000
I remember the crazy days. 500 posts an hour. Nubmer! Natgbsb
damn you people making me have equations running around in my brain. I'll be walking around mutting f=ma, d=.5atsquared