Yeah but you'll have to dive in a sub with it.

I've allways wondered what a person would look like if the sub were to suddenly inplode. Have you watched James Cameron's "The Abyss" before?

why would it be expensive? baloons only cost like 25 cents apiece

Sound like a very expensive fart to me...

i think it'd pop. the oxygen would eventually be packed to the limit and, pop.

I wonder what would happen to a balloon filled with air and tied to a sub. Logically it should shrink as the external water pressure risses.

wow. that's pretty small.i wonder what would happen to gum? that'd be pretty neat.

Well you see, the foam cup had all the crew's signatures on it. Because it is relatively soft (stirofoam) the water had exurted enough pressure to squeeze it to the size of a thimble.

i think so, but i'm not sure. it's really interesting to watch these pressure expiraments. i've seen a few on Discovery

If the can fills with water it won't change shape at all because the waterpressure inside and outside the can is equally dense. It will sink to the bottom and look the same. It would be crushed if it had air inside it or if it had been filled with fluid of a lower pressure than that of the water at the Titanic wreck site.

Did anyone see what happened when they attached a foam cup to the sub that went down to the Titanic on an earlier expedition?

they'd probly survive but they'd be paper thin by the time they got down there. that's a good point. i didn't even think of water pressure as a factor