If the uncertainty in position is of the order of $1 \, \mathring{A}$,what will be the uncertainty in velocity of a cricket ball weighing $150 \, g$?

  • A
    $3.499 \times 10^{-6} \, m s^{-1}$
  • B
    $3.499 \times 10^{-24} \, m s^{-1}$
  • C
    $3.949 \times 10^{-23} \, m s^{-1}$
  • D
    $3.499 \times 10^{-12} \, m s^{-1}$

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Uncertainty in the position of an electron (mass $= 9.1 \times 10^{-31} \ kg$) moving with a velocity $300 \ ms^{-1}$ accurate up to $0.001 \ \%$ will be $(h = 6.63 \times 10^{-34} \ J \cdot s)$.

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