When 10-µC Point Charge Is 15 M from a Second Point

Multiple Choice

When 1.0-µC point charge is 15 m from a second point charge,the magnitude of the force they exert on each other is 1.0 µN.What is the magnitude of the second charge? (k = 1/4πε₀ = 9.0 × 10⁹ N ∙ m²/C²)

A) 25 C
B) 1.0 C
C) 10 nC
D) 0.025 C
E) 25 nC