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# a 6 - × 10 30 kg(1.5 solar masses and its radius is 8,000...

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PHYSICS 309K, FALL 2004 HOMEWORK #6, Due Friday 10/22/04 1. Find the change in the force of gravity between two planets when the distance between them is decreased by ﬁve. 2. The value of g at the Earth’s surface is about 9.8 m/s 2 . What is the value of g at a distance from the Earth’s center that is four times the Earth’s radius? 3. The mass of a certain neutron star is 3
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Unformatted text preview: . × 10 30 kg (1.5 solar masses) and its radius is 8,000 m (8 km). What is the acceleration of gravity at the surface of this condensed, burned-out star? 4. Calculate the force of gravity between the Earth (mass = 6 × 10 24 kg) and the sun (mass = 2 × 10 30 kg, distance = 1 . 5 × 10 11 m)....
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