Verified Answer :

natfrog17

Convert everything in the mks units

Velocity per second = 12411.6/60/60=0.55 m/s

mass= 6.45 g= 6.4510^(-3) kg

de Broglie wave length Lambda is

Lambda = h/p

h in mks units is 6.610^(-34)

Lambda = 6.6 10^(-34)/(6.4510^(-3)0.55)=1.86*10^(-3... m

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