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Estimate the value of the gravitational constant G in Newton’s law of universal gravitation using the following data: the acceleration due to gravity at the Earth’s surface is about 10 m/s2; the Earth has a circumference of about 40 × 106 m; rocks found on the Earth’s surface typically have densities of about 3000 kg/m3 and assume this density is constant throughout (even though you suspect it is not true).
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