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How do I find this? 60x10-6 = ?

  1. Nov 26, 2012 #1
    I don't understand where it comes from.

    Say for example 60x10-6

    or sixty times 10 to the power of mines six.

    How do I find the last part?
     
  2. jcsd
  3. Nov 26, 2012 #2

    berkeman

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    Staff: Mentor

    Re: How do I find this?

    1x10^-6 = 0.000001

    10x10^-6 = 0.000010

    60x10^-6 = _________

    Does that help?
     
  4. Nov 27, 2012 #3

    CWatters

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    Science Advisor
    Homework Helper

    60x10-6 = 1 / (60x106)

    106 = 10 * 10 * 10 * 10 * 10 * 10 = 1,000,000

    10-6 = 1 / (10 * 10 * 10 * 10 * 10 * 10) = 1/1,000,000


    Try..

    1/(3-2) = ?
     
  5. Nov 27, 2012 #4
    No. In fact, 60 × 10-6 = 60 / 106.
     
  6. Nov 28, 2012 #5
    I know what it means but what I don't understand is where it comes from I mean like when do I know when to use it?

    For example:

    150mm dia
    Elasticity 200gpa


    But I wrote it down as 150x10^-3 and 200x10^9

    I could of left it as 150 and 200 but I changed it to ^ instead, why did I do it and how did I know that it was ^-3 and ^9?
     
    Last edited: Nov 28, 2012
  7. Nov 28, 2012 #6

    berkeman

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    Staff: Mentor

    The prefixes are part of the definition of the International System of units ("SI" units):

    http://physics.nist.gov/cuu/Units/prefixes.html

    And note that "Giga" (10^12) uses a capital "G", not a lowercase one as you have written. :smile:
     
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