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According to Heisenberg uncertainty principle
∆x × m∆ v > h/4π
or ∆v > h/ 4π×∆x × m ----- 1
here m= 9.11 × 10^-31 kg;
∆x=0.1 A°= 0.1×10^-10m
h=6.626 × 10^-34 kgm^2 s^-1
substituting the values in expression in eq - 1
∆ v = 6.626× 10^-34kg m^2 s^-1 / 4× 3.142× (10^-10 m)
( continuation) ×(0.150kg)
=3.52×10^-24 ms^-1
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