The period of a satellite circling planet Nutron is observed to be 84 s when it is in a circular orbit with a radius of 8.0 × 106 m. What is the mass of planet Nutron?
A. 6.2 × 1028 kg
B. 5.0 × 1028 kg
C. 5.5 × 1028 kg
D. 4.3 × 1028 kg
E. 3.7 × 1028 kg
Answer: D
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Coulomb's Law: Two tiny particles having charges of +7.00 ?C and -9.00 ?C are placed along the y-axis. The +7.00-µC particle is at y = 0.00 cm, and the other particle is at y = 40.00 cm. Where must a third charged particle be placed along the y-axis so that it does not experience any net electric force due to the other two particles?
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