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Thread: what is this unit of measurement called please?

  1. #1 what is this unit of measurement called please? 
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    In my studies i am comming across a unit of measurement which looks like a u but has a longer straight line, its some form of tiny measurement of length.
    Since its not on the standard keyboard and i dont know what its called I cant google it, can anyone help - a lower case u with a longer straight bar extending downwards


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  3. #2  
    Forum Professor jrmonroe's Avatar
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    This is the Greek lowercase "m" having the name 'mu' (say "myew"). You can think of it as an "m" (or, better yet, an "M"), where the middle is saggy and rounded instead of angular, and with a longer/descending left "leg".

    The small mu represents various scientific concepts. It represents "micro-" (meaning one-millionth), as in m, meaning "one-millionth of a meter" (also called a "micron"); it represents the coefficient of friction between two solids; it commonly represents the arithmetic mean (ie, the "average") of a population (which is also where the Greek lowercase sigma, σ, represents the population's standard deviation); etc.


    Almost everything you do will seem insignificant, but it is important that you do it. (Mahatma Gandhi) Grief is the price we pay for love. (CM Parkes) Our postillion has been struck by lightning. (Unknown) War is always the choice of the chosen who will not have to fight. (Bono) The years tell much what the days never knew. (RW Emerson) Reality is not always probable, or likely. (JL Borges)
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  4. #3  
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    When it comes to measurements it means 10^-6; a micrometer is 10^-6 meters (as opposed to a millimeter which is 10^-3 meters, or a nanometer which is 10^-9 meters).
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  5. #4 Re: what is this unit of measurement claled please? 
    Moderator Moderator TheBiologista's Avatar
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    Quote Originally Posted by ZeroZero
    In my studies i am comming across a unit of measuement which looks like a u but has a longer straight line, its some form of tiny measurement of length.
    Since its not on the standard keyboard and i dont know what its called I cant google it, can anyone help - a lower case u with a longer straight bar extending downwards
    In situations where we can't use the mu symbol, it's acceptable to use a lower case u.
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  6. #5  
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    I need to spend more time to read more fully, and then I would have understood what you were actually asking. My apologies for my last post.

    In an effort to add something more constructive, this page shows a large number of special characters, including mu, and how to produce them. Make sure num lock is turned on, press and hold down "Alt", and then type 230 or 0181 before releasing. Different characters require different numbers (which are listed).
    -Perhaps it is because I am running linux, but this is not working for me. I remember that a few years back I used this (when I had windows). I don't know much about computers so I can only speculate as to why this isn't working for me at the moment; I hope it works for you.
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  7. #6  
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    thank you all very informative
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  8. #7  
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    micro
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