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    dudes, do u need to knwo the mass of a proton. is there any way of working it out?
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    Its more or less the same as 1 U (unified mass unit? Cant exactly remember what it actualy stands for). The value of U is given in the back of the paper usualy.
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    t'is given in formulae book
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    i've never known you to have to work it out - and i don't know of a theoretical way of doing it - it has the value 1.67x10-27 Kg. however, i've seen papers expect you to know things like the mass of the earth... yeah, like that's got a file in the ol' noggin! at least that's calculable though, oh wait... yep, you need to know the radius to do that... stupid edexcel... grrrr
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    God bless the AQA data sheet with it's multidute of equations constants and units...
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    (Original post by KAYS)
    dudes, do u need to knwo the mass of a proton. is there any way of working it out?
    You just need to know the following,

    1amu = 1/12 Mass Of Carbon-12 = 934MeV = 934 x 106 x 1.6x10-19 J

    And so the mass is calculated using e=mc² with the above.
 
 
 
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