30. What is the electrostatic force between two +1.0 C charges that are 0.5 m apart? (Coulomb's constant is 9.0 x 109 Nm2/c2; e -1.602 x 10 19 C) O 2.0 x 10° N O 3.6 x 10N O 1.8 x 1010 N O 4.0 x 10° N
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