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  1. #41
    Worker 11811's Avatar
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    Quote Originally Posted by Steve Smith View Post
    It's the other way round. Inches existed before millimetres. It is the inch which defines the millimetre by stating that 25.4 of them will fit into one inch.
    Yes, the inch existed before the meter but it's not the same inch we use today. In 1959, the US joined in an international treaty which defined the inch for use in international trade, etc. That treaty defined the inch as 25.4 mm, exactly.

    The meter was originally defined as 1/10,000,000 of the distance between the north pole of the earth and the equator, as measured at sea level. However, in 1983, the meter was redefined as the distance traveled by a photon of light emitted from a krypton atom in 1/299,792,458 of a second.

    So, therefore, ever since 1983, the inch has been defined as 0.0254 * the distance light travels in 0.000000003335641 seconds.
    Randy S.

    In girum imus nocte et consumimur igni.

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    http://www.flickr.com/photos/randystankey/

  2. #42
    Ross Chambers's Avatar
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    I feel privileged in a way that Australia and New Zealand adopted the metric system when I had been using the Imperial one for 40 years or so. I could use both, choosing which was best for the time.

    For whole metres I just take "giant steps" one of each being close enough to a yard=a metre, which reflects the charming Imperial measurement derivations, so many of which were based on human anatomy.

    It's interesting to see the standards which never made it to metric: in my film industry days feet persisted, it would have sounded crazy to say at a rough cut screening "That shot needs just another 30.48 centimetres" rather than " a foot" The processing labs did charge by the metre, though.

  3. #43
    Steve Smith's Avatar
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    Quote Originally Posted by Worker 11811 View Post
    Yes, the inch existed before the meter but it's not the same inch we use today. In 1959, the US joined in an international treaty which defined the inch for use in international trade, etc. That treaty defined the inch as 25.4 mm, exactly.
    That's because before WWII your inch wasn't the same size as the Imperial inch.


    Steve.

  4. #44

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    Quote Originally Posted by zsas View Post
    Haaa!! Only 650 lbs! 5.3 meters! See, learning these meters too...
    No, 295 1/2 kilos.

  5. #45
    Leigh B's Avatar
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    Quote Originally Posted by E. von Hoegh View Post
    No, 295 1/2 kilos.
    C'mon, E....

    Only drugs are measured in kilos.

    And BTW, that would be 295.5 kilos.

    - Leigh
    “Wise men talk because they have something to say; fools, because they have to say something.” - Plato

  6. #46
    zsas's Avatar
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    Quote Originally Posted by E. von Hoegh View Post
    No, 295 1/2 kilos.
    Ha
    Last edited by zsas; 08-04-2012 at 09:22 AM. Click to view previous post history. Reason: Add quote
    Andy

  7. #47

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    Quote Originally Posted by Leigh B View Post
    C'mon, E....

    Only drugs are measured in kilos.

    And BTW, that would be 295.5 kilos.

    - Leigh
    Nope. 295.4545>. I rounded up, fractions are nicer anyway.

  8. #48
    Leigh B's Avatar
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    I rounded up also.

    Fractions are never used in metric to my knowledge.

    - Leigh
    “Wise men talk because they have something to say; fools, because they have to say something.” - Plato

  9. #49

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    Quote Originally Posted by Steve Smith View Post
    That's because before WWII your inch wasn't the same size as the Imperial inch.


    Steve.
    If that's true, (i haven't researched it), why do my post-WWII measuring tools agree with pre-WWII British measurements?

  10. #50

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    Quote Originally Posted by Leigh B View Post
    I rounded up also.

    Fractions are never used in metric to my knowledge.

    - Leigh
    Funny, I sold half a kilo of crack just this morning....

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