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Q1 = 3x10³ C
Q2 = 5x10⁻⁹ C
r = 5 cm = 5x10⁻² m
ditanyakn : F ?
dijawab :
F = k Q1Q2/r²
= 9x10⁹ x 3x10³ x 5x10⁻⁹/( 5x10⁻²)²
= 9x10⁹ x 15x10⁻⁶/25x10⁻⁴
= 5,4x10⁷ N