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John Cuthber's Profile
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Today, 02:47 PM- Currently:
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In Topic: Energy levels
24 May 2012 - 05:47 PM
You can calculate the energies concerned (to arbitrary accuracy) and those calculations are often in the forms of sums of infinite series so the answers are quite likely to be irrational.
Also, the length of a bit of string is (almost certainly) irrational.
Say it's about 15 cm long.
If I measure it with a ruler calibrated in cm I get an answer of 15 cm.
If I use a finer ruler I might get 15.3cm.
with a better measurement I get- say- 15.31. Each time I measure it more precisely, I get more places of decimals in the answer.
Even allowing for the nature of atoms, I can keep on getting more and more places of decimals and so (at least down to the Plank length) the measurement isn't rational.
I'm not certain what's meant to happen on a smaller scale than that but I suspect that you sometimes get 15. ...........01 cm and sometimes 15. ...........02 cm.
The more often you repeat the measurement, the closer you get to the true value, but the series never stops getting longer. -
In Topic: Questions about bodily use of vaseline
24 May 2012 - 05:40 PM
I suspect that, once it warms up a bit it will act very much the same as
http://en.wikipedia....ffin_(medicinal)
which makes it a rather bad idea. -
In Topic: If Barack Obama is Christian, then...
23 May 2012 - 06:48 PM
iNow, on 23 May 2012 - 06:08 PM, said:Another issue is how frequently people mistakenly assume marriage to still be a religious institution instead of a social / civil one.
There were plenty of groups of people in the world who, though they had never heard of Christianity, still had weddings.
Pair bonding was, in all sensible probability, here before Christianity or Judaism.
So the point is not so much that they think marriage is still religious, it's wrong of them to assume that it ever really was. -
In Topic: Entropy:A concept that is not Physical Quantity
23 May 2012 - 06:03 PM
I think it's clear enough that anyone who doesn't understand the relationship between entropy and endothermic reactions does not understand thermodynamics and is, by that fact, unqualified to offer a meaningful opinion about entropy.
On that basis, and also because the OP's refusal to discuss his ideas is a breach of rule 8, I suggest closing the thread. -
In Topic: How dangerous could glass dust be if it were aerosolized?
23 May 2012 - 05:56 PM
"So at the size it would need to be to be dispersed on the wind, are you saying ground glass wouldn't affect the eyes or lungs any more than normal sand?"
That's exactly what I'm saying.
Both materials are hard and they both form fairly sharp edged broken bits.
I realise this isn't quite the same thing
http://www.snopes.co...oison/glass.asp
but it does show that there's a lot of cobblers talked about powdered glass.

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michel123456
19 Dec 2011 - 22:02http://www.godlikeproductions.com/forum1/message1549881/pg1
Appolinaria
10 Nov 2011 - 06:19Klaplunk
26 Jul 2010 - 20:32