05-05-2013, 07:59 PM
(This post was last modified: 05-05-2013, 08:00 PM by puzzledpaul.)
Similar to FB's comments ... imagine a cup / mug.
Lay this (preferably empty) on its side on a table and you've essentially got a cave. No conceptual difference.
Main difference - I imagine - with what you're after is that the mug's external shape matches the cavity, whereas a hill (say) would be a completely different shape from the cave in its side.
So the hill + cave is basically a mug with non uniform thickness walls
pp
Lay this (preferably empty) on its side on a table and you've essentially got a cave. No conceptual difference.
Main difference - I imagine - with what you're after is that the mug's external shape matches the cavity, whereas a hill (say) would be a completely different shape from the cave in its side.
So the hill + cave is basically a mug with non uniform thickness walls
pp