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Guest Message © 2012 DevFuse

John Cuthber's Profile User Rating: -----

Reputation: 729 Glorious Leader
Group:
Resident Experts
Active Posts:
4,937 (2.16 per day)
Most Active In:
Chemistry (461 posts)
Joined:
24-February 06
Profile Views:
12,447
Last Active:
User is online Today, 02:47 PM
Currently:
Viewing Topic: Titanium Composite High-Strength...

My Information

Member Title:
Chemistry Expert
Age:
46 years old
Birthday:
November 10, 1965
Gender:
Not Telling Not Telling
Location:
England

Contact Information

E-mail:
Click here to e-mail me

Posts I've Made

  1. 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.
  2. 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.
  3. In Topic: If Barack Obama is Christian, then...

    23 May 2012 - 06:48 PM

    View PostiNow, 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.
  4. 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.
  5. 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.

Comments

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  1. Photo

    michel123456 

    19 Dec 2011 - 22:02
    The Beloved Stalker STEVEN CHRISTOPHER will be released from JAIL on 9/25/2011!
    http://www.godlikeproductions.com/forum1/message1549881/pg1
  2. Photo

    Appolinaria 

    10 Nov 2011 - 06:19
    Happy birthday.
  3. Photo

    Klaplunk 

    26 Jul 2010 - 20:32
    I will teach you cubic truth so we can discuss cubic truth if you would like?
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