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Q. Two charged objects have an attractive force of 1.3N. If the charge on one of the objects in tripled, what is the new force between the objects?

Q. Our galaxy, the Milky Way, contains approximately 4.0*10^11 stars with an average mass of 2.0*10^30kg each. How far away is the Milky Way from our nearest neighbor, the Andromeda Galaxy, if Andromeda contains roughly the same number of stars and attracts the Milky Way with a gravitational force of 2.4*10^30N?

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