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Calculate the fraction per m of 9.3 MeV alpha particles scattered at 60 from a gold foil of thickness 3.2 x 107 m at

Calculate the fraction per m of 9.3 MeV alpha particles scattered at 60 from a gold foil of thickness 3.2 x 107 m at a distance of 1.5 cm from the target. Round to two sig figs.

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