Conversations at our house, Take 2

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/mission_pages/LCROSS/main/index.html

3:50 PM

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.