E-book Correction Possible error in vol 1 chap 4 part 1 Scientific notation

Discussion in 'Feedback and Suggestions' started by Auke L. Klazema, Dec 6, 2014.

  1. Auke L. Klazema

    Thread Starter New Member

    Nov 21, 2014
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    0
    Hi All,

    First post. I think there might be an error in chapter 4 part one of volume one.

    http://www.allaboutcircuits.com/vol_1/chpt_4/1.html

    Take note of those two numbers and of the relative sparsity of non-zero digits in them. For the mass of the proton, all we have is a "167" preceded by 23 zeros before the decimal point.​

    It talks about 23 zeros before the decimal point. Shouldn't that be after the decimal point?

    Greetings,
    ALK
     
  2. Wendy

    Moderator

    Mar 24, 2008
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    Note the section describes numbers of electrons vs. mass of a proton.

    Not verified.
     
  3. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    In the beginning I was thought as you did, but I saw many times tried to figure out why it describe that way, I think the "before" here was represent the number is less than 1, if using "after" it means that the number is bigger than 1.

    I think these are the position and direction problem, if the decimal point "." is a standard position, the right side is the number less than 1, and the left side is the number bigger than 1, so when we comparing the "." and 167 or 23 zeros, the "." is on "after" position, the 167 or 23 zeros are on the "before" position.
    --------------------------------------------------------------------
    00000 00000 00000 00000 000

    Proton mass = 0.00000000000000000000000167 grams

    a "167" preceded by 23 zeros before the decimal point.
     
  4. Wendy

    Moderator

    Mar 24, 2008
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    Ah, so it should be rephrased,


    OK, verified.
     
  5. Auke L. Klazema

    Thread Starter New Member

    Nov 21, 2014
    7
    0
    Yep just a rephrase to make it correct. I will try to make it more clear in the future.
     
  6. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    No problem. Thanks for the feedback.
     
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