11-12. Determine the electrical force of attraction between two balloons with separate charges of +3.5 x 10-8 C and -2.9 x 10-8 C when separated a distance of 0.65 m.
A. 1.26 x 10-5 N
B. 2.16 x 10-5 N
C. 3.12 x 10-5 N
D. 6.21 x 10-5 N
13-15. At what distance of separation must two 1.00-microCoulomb charges be positioned in order for the repulsive force between them to be equivalent to the weight (on Earth) of a 1.00-kg mass?
A. 0.01 m
B. 0.02 m
C. 0.03 m
D. 0.04 m
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