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- From: butler@rschp2.anu.edu.au (Brent Butler)
- Newsgroups: sci.math,sci.physics
- Subject: Re: 3-sided coin
- Date: 18 Nov 1992 04:33:49 GMT
- Organization: Australian National University
- Lines: 27
- Message-ID: <1ech3dINNju3@manuel.anu.edu.au>
- References: <1dsj4gINNeuh@agate.berkeley.edu> <1e98b8INN6s@manuel.anu.edu.au> <1992Nov17.135016.3532@panix.com>
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-
- >>[I said problem is simple - ... the answer is when the gravitational
- >>potential energies are equal. i.e. t/d=1]
-
- Rob Ryan says:
- >Yes, it will come to rest at a minimum, but it doesn't have to be an
- >absolute minimum, but rather a local minimum would do as well.
- >Resting on edge is a relative minimum and is therefore possible.
-
- Yes. You are right. I implied that the lowest energy
- state would be the only one possible. This is of course
- incorrect - all states are possible but with probability that
- depends on the energy of that state above the ground state.
- Higher energy states are of course possible (populated) but less
- likely. I still contend that this is the best
- back-of-the-envelope (or was that a taxi :) ) method of getting
- at a *reasonable* answer though. [I should note here that Blair
- H. made an important factor of 2 correction to this argument that
- I left out (I did not count the number of states correctly) - so
- I'm wrong on more than one count in my original post. t/d should
- be =1/2 which is identical to the equal areas hypothesis!]
-
- And yes, there is much much more to this problem than that but the
- original poster asked for a 20 second answer and the dynamics of
- a thick coin toss are beyond the scope of 20 seconds.
-
- -Brent Butler
-