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    In question 1.2, why the answer is strong nuclear?
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    well gravitational only affects really big objects (in a noticeable way anyway), electromagnetic force only occurs between particles of opposite charges and both particles in this instance have the same charge so it can't be that. so that just leaves strong and weak nuclear force and since this force is making a reaction it would have to be strong therefore it must be strong nuclear force
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    The weak force only concerns leptons, and also only concerns decay. The given particle equation shows an interaction between a pion and a proton, not a decay. So it can't be the weak force.
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    (Original post by The_Big_E)
    The weak force only concerns leptons, and also only concerns decay. The given particle equation shows an interaction between a pion and a proton, not a decay. So it can't be the weak force.
    so in weak interaction, only one particle can be on the left side of the equation? What I originally thought is that pion decayed into Kaon. I know it is wrong but i dont know the reason.
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    (Original post by alesha98)
    so in weak interaction, only one particle can be on the left side of the equation? What I originally thought is that pion decayed into Kaon. I know it is wrong but i dont know the reason.
    Don't take my word, as I studied Edexcel physics and the weak/strong force wasn't covered in much detail. But yes, that's what I remembered about the weak force.
 
 
 
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