Question

14 zadanie nado, help

Answer 1

$q1 = \frac{f \times {r}^{2} }{k \times {q}^{2} } \\ q1 = \frac{ {0.0008} \times {6000}^{2} }{9 \times {10}^{9} \times {0.0008}^{2} } = 5$