An accelerated electron has a speed of 5 × 10 ^ 6 ms ^ - 1 with an...

$\Deltav = \dfrac{0 . 02}{100} \times 5 \times {10}^{6} = {10}^{3}m{s}^{- 1}$

$\Deltax \cdot \Delta v = \dfrac{h}{4\pi m}$

$x \times {10}^{- 9} \times {10}^{3} = \dfrac{6 . 63 \times {10}^{- 34}}{4 \times 3 . 14 \times 9 . 1 \times {10}^{- 31}}$

$x \times {10}^{- 9} \times {10}^{3} = 0 . 058 \times {10}^{- 3}$

$x = \dfrac{0 . 058 \times {10}^{- 6}}{{10}^{- 9}} = 58$