Essay
Some astrologers claim that the gravitational influence of Mars can affect a child during birth. Gravitational force is linearly proportional to the masses of two bodies and decreases with the square of the distance between those bodies. Compare the influence of Mars (at a distance is 7.8 × 107 km from Earth) and a 70 kg doctor at a distance of 0.1 m, on a 3 kg baby. The mass of Mars is 6.42 × 1023 kg, and the universal gravitational constant is G = 6.67300 × 10-11 m3 kg-1s-2.
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