# Big elephants

rwingett
Posers and Puzzles 14 Nov '02 21:30
1. rwingett
Ming the Merciless
14 Nov '02 21:30
If you proportionally double the size of an elephant, how much will its weight
increase?
2. 14 Nov '02 21:55
3. richjohnson
TANSTAAFL
15 Nov '02 01:16
weight is proportional to volume, not area.
4. 14 Nov '02 22:35
If the elephant eats itself will it vanish or be twice as big?
Mari
5. maggoteer
The MAKIA
15 Nov '02 01:02
It will weigh twice as much, but be invisible.

Anyone know what a &quot;Klein bottle&quot; is? Sort of like a Mobius strip. I suddenly
thought of a Klein elephant. If you stick the trunk in the..., oh let's not go
there...
6. 15 Nov '02 04:56
I've wasted hours sitting in front of a real life Klein bottle. It's just,
well, incredible. Am I right in thinking that a *true* Klein bottle can't
actually be made in three dimensions? Can it be done in 4
dimensions, or 5 or 6 or 7 or...?

Mark
The Squirrel Lover
7. belgianfreak
stitching you up
15 Nov '02 13:51
sounds facinating (even to my mathimatically redundant brain)
8. 15 Nov '02 14:57
Jon, try this (there may be better explanations but it's the best one
I've found after a few minutes of searching):-

http://www.kleinbottle.com/whats_a_klein_bottle.htm

Also,

http://mathforum.org/library/drmath/view/55176.html
http://mathforum.org/library/drmath/view/55185.html

These last two (and the links from them) helped to answer a lot of the

Mark
The Squirrel Lover
9. Acolyte
15 Nov '02 12:12
Related question: Drop an earthworm down a mineshaft, and it will probably survive. Drop
an elephant down a mineshaft (assuming the shaft is wide enough), and it'll splatter at the
bottom. Why?
10. belgianfreak
stitching you up
15 Nov '02 13:49
surface area to volume ratios... if you halve somethings size you don't
halve its surface area. The best visual explanation I've seen of this
(for kids) is by cutting an orange in half - it's obvious tha the juicy bit
is extra surface area yet the mass has just halved.

Oh yeah.. the other half of the answer is wind resistance, which is
directly related to surface area..
11. Acolyte