Okay, so this wasn't actually a conversation that took place at our house (someone please shoot me if D and I start g-chatting while we are in the same room). This is a g-chat from work last week:
D$: It's perfectly reasonable to bomb the moon is what I"m telling you3:49 PM http://www.nasa.gov/
MWK: so "lunar impacts" = bombing the moon?
D$: Well, let's see.
3:51 PM It is currently travelling at 2668 mph
and is 57,000 km out
3:56 PM D$: assuming it's now just falling toward the moon, it should end up going about 4,000 mph
MWK: what does this have to do with whether or not it constitutes bombing?
3:57 PM D$: well, hang on
I have to find out how much it weighs
ahh, 5000 lbs
3:58 PM OK
3:59 PM so, it turns out to be almost exactly the same energy as a TON of TNT
MWK: in other news: the Christina Aguilera channel on Pandora is totally awesome.