yg ngerti bantu dong kak
kurang itu doang soalnya 
kurang itu doang soalnya
PEMBAHASAN
Listrik
1 uC = 1 × 10-⁶ C
Diketahui:
r = 30 cm = 30 : 100 m = 3 : 10 m = 3 × 10-¹ m
q1 = 20 × 10-⁶ C
q2 = 4 × 10-⁶ C
k = 9 × 10⁹ Nm²/C²
Ditanya:
F = ...
Jawaban:
[tex]F = \frac{k \: . \: q1 \: . \: q}{ {r}^{2} } [/tex]
[tex]F = \frac{9 \times {10}^{9} \: . \: 20 \times {10}^{ - 6} \: . \: 4 \times {10}^{ -6} }{ {(3 \times {10}^{ - 1}) }^{2} } [/tex]
[tex]F = \frac{720 \times {10}^{ - 3} }{9 \times {10}^{ - 2} } [/tex]
[tex]F = 80 \times {10}^{ - 1} [/tex]
[tex]F = 8 \: N[/tex]
