From: utzoo!decvax!harpo!floyd!vax135!cornell!uw-beave!uw-june!palmer
Newsgroups: net.physics
Title: Re: Ice in water
Article-I.D.: uw-june.367
Posted: Fri Apr  8 13:06:27 1983
Received: Sun Apr 10 01:29:41 1983
References: peri.201 amd70.1752 vax1.297


	Air in the ice would make no difference at all, if it were at 
atmospheric pressure.
	There would be a very, very slight increase in the water level when
the ice melted, due to the fact that the ice cube is also displacing air.
(Imagine that the ice expands a lot, so that it ends up at the density of
helium.  The ice would float in air, but when it melted it would increase
the water level, even though it displaced no water when it was frozen.
Scale this down a bit, and you have the effect.)
	Of course, if you take into account this effect, you might as
well go all the way and worry about the Earth's gravity gradient.  This would also
decrease the weight of the ice, so the water level would rise when it melted.

		David Palmer