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1. What must be the radius of a star of mass 2.0 x1030 kg so that the escape speed from this star is equal to

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1. What must be the radius of a star of mass 2.0 x1030 kg so that the escape speed from this star is equal to 2 x108 m/s? R = 6674 m or 7x103 m 12. Two protons are separated by a distance of 3.8x10-10. Find the magnitude of the! gravitational force one proton exerts on the other, IFG = 1.3 x10-45 N

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