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Introduction and general help regarding powers

  1. May 23, 2012 #1
    Hi there, Good evening all.

    Ok, Ive just started my HNC in electrical engineering (1 month in via open learning)and to be honest, I'm struggling. I understand all the concepts of the equations regarding bending moments, shear force diagrams etc but i cant seem to get to grip with the equations.. I have a level maths but i achieved this 8-9 years ago so i'm after a bit of directional help.

    Q1, what or how is the best way to write to the 'poer minus 4' ( the minus sign up in the air)?
    Q2, Can anyone explain to me in simple terms the best way to understand poers e.g. 1mm4=(1x10^3)4=1x10^12M

    Also if there is any good reading material out there that may be useful please point me in the right direction. Much appreciated.
     
  2. jcsd
  3. May 23, 2012 #2

    tiny-tim

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    Welcome to PF!

    Hi Harrison01! Welcome to PF! :smile:
    first, there's a "w" in there … "powers" (rhymes with "hours") :wink:

    "x to the minus 4"

    "x-4"

    "1/x4"
    do you mean "one milllimetre"? that's 0.001 m, or 10-3 m

    if you want that to the 4th power, that's (10-3 m)4,=10-12 m4

    ("m4" is like "s2", it's a maths thing, it doesn't mean anything you can draw)
     
  4. May 25, 2012 #3
    Re: Introduction and general help regarding poers..

    cheers for the reply tim,

    1mm=0.001M=10-3

    But what is the best way to write to the minus 3. is there a common symbol as i cant get the - to go higher than the norm..
     
  5. May 25, 2012 #4

    tiny-tim

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    Hi Harrison01! :smile:
    on this forum, you can use the X2 button just above the reply box,

    ([NOPARSE]or type 10-3[/NOPARSE])

    alternatively, write 1/10³ :wink:
     
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