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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Two objects gravitationally attract with a force of 1,713 N. If mass 1 is multiplied by 4.78, mass 2 is multiplied by 0.60, and the distance is multiplied by 3.71, the new force of attraction is:
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- Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8 ✕ 1011 solar masses. A star orbiting near the galaxy's periphery is 6.0 ✕ 104 light years from its center. (a) What should the orbital period (in y) of that star be? y (b) If its period is 6.9 ✕ 107 y instead, what is the mass (in solar masses) of the galaxy? Such calculations are used to imply the existence of "dark matter" in the universe and have indicated, for example, the existence of very massive black holes at the centers of some galaxies. solar massesarrow_forwardIf mass 1 and mass 3 are 5.00 kg, what is the total gravitational potential energy of the three masses?arrow_forward. The drawing represents two suspended spheres. The force of gravity between the two spheres is 12 N (newtons). If the mass of each sphere is doubled (2x), and the distance between the spheres remains constant, what will happen to the force of gravity?arrow_forward
- An object is orbiting at a distance of 1.0 x 107 m from the center of a planet. The gravitational force between the object and the planet is 10.0 N. What would the gravitational force be if the object were orbiting at a distance of 5.0 x 106 m?arrow_forwardYou have a mass of 70kg and are standing 6 meters away from a tractor-trailer. You feel a gravitational force of 7.85N. What is the mass of the tractor-trailer?arrow_forwardA 33 kg mass is separated from a 19 kg mass by 5 meters. What is the magnitude of the gravitational force in Newtons on the 33 kg mass?arrow_forward
- If a planet with 7.5 times the mass of Earth was traveling in Earth's orbit, what would its period be (in years)? yrarrow_forwardThe gravitational force between two objects that are 2.2x10^-1m apart is 3.1x10^-6N. If the mass of one object is 45 kg what is the mass of the other object?arrow_forwardThe density of Planet Y in the previous problem is Show the entire calculation. Calculation: The universal gravitational -11 3 -1 -2 constant is 6.67430*10 m kg s . Planet Y has a radius of 5360km or 5.360*10 m and a mass of 4.56*10²3 kg. On this planet, a rock falls vertically down from a cliff overhang to the ground. The height of the cliff is 86m. The time it M takes the rock to fall from the overhang to the ground is Show the entire calculation. Calculation: g = G*- The density O R of Planet Y in the previous problem is Show the entire calculation. Calculation:arrow_forward
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