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    hey people, i am kinda stoned need help. i know it looks easy but i just cant figure it out: what particle is there in this interaction, its the last question bothering me..
    http://i49.tinypic.com/21jr443.png
    Thanks
 
 
 
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Updated: January 14, 2010
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Could you cope without Wifi?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

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