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[" The distance of closest approach of an "alpha" -particle "],[" fired at nucleus with momentum "p" is "d" .The distance "],[" of closest approach when the "alpha" -particle is fired at same "],[" nucleus with momentum "3p" will be "quad " [EAMCET "2015]],[[" (a) "3d," (b) "(d)/(3)," (c) "9d," (d) "(d)/(9)]]

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