From: utzoo!decvax!harpo!floyd!vax135!cornell!uw-beave!jim
Newsgroups: net.physics
Title: Hole through the Earth
Article-I.D.: uw-beave.474
Posted: Fri Apr  8 13:49:02 1983
Received: Sun Apr 10 01:48:48 1983

Now that the "ice in water" question has been settled, here is another
one for you.

Suppose I drill a hole straight down, through the center of the earth,
and out the other side.  Suppose I line it with something so that the
walls are not too hot and the hole doesn't collapse.

1.  Describe the behavior of an object dropped down the hole.

2.  Describe the atmospheric pressure encountered in the hole.  Is it
sea level all the way down, or what?