[填空题]
An electron and a $140$-g baseball are each traveling $150 \, \text{m/s}$ measured to an accuracy of $0.055\%$. Calculate and compare the uncertainty in position of each.
For the electron $\frac{\hbar}{m\Delta v}$= $\times 10^{-3}\ \text{m}$
For the baseball $\frac{\hbar}{m\Delta v}$ = $ \times 10^{-33}\ \text{m}$
