\(\Delta x . \Delta p=\frac{h}{4 \pi}\)

\(\Delta x=\Delta p(\Delta x=\) uncertainty in position)

\((\Delta p)^{2}=\frac{h}{4 \pi} \quad(\Delta p=m \times \Delta v)\)

\(m^{2} \Delta v^{2}=\frac{h}{4 \pi} \quad m=m a s s\)

\(\Delta v^{2}=\frac{h}{m^{2} 4 \pi}\)

\(\Delta v=\frac{1}{2 m} \sqrt{\frac{h}{\pi}}\)

\(\Delta v=\) uncertinty in velocity)