Physics

Physics

Problem

A research balloon rises to an altitude of 160 km160\,\text{km} above the Earth’s surface. Taking Earth’s radius R=6400 kmR = 6400\,\text{km}, the percentage decrease in the value of gg at that altitude is closest to a) 2.5%2.5\% b) 7%7\% c) 3%3\% d) 5%5\%

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