What equal charges should to be placed one earth and moon to neutralize their gravitational attraction ? (mass of earth = 1025 kg, mass of moon= 1023 kg.

  • 8.6 × 10¹³ C 
  • 6.8 × 10²⁶ C
  • 8.6 × 10³C
  • 9 × 10⁶ C
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