1 a moon of a certain planet has an orbital radius of 13 x, Ask an Expert

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1. A moon of a certain planet has an orbital radius of 1.3 x 10^8 m and an orbital period of 5.2 x 10^5 s. If a satellite is in an orbit with a radius of 7.9 x 10^7 about the same planet, what will its orbital period be?

2. The average distance between the electron and the proton in a hydrogen atom is 5.30 x 10^-11 m. Relative to zero at infinity, what is the electrical potential due to the proton at this distance?

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