The property that differs Pluto from all other planets.

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Chapter 9.1, Problem 9.1CYU

To determine

The property that differs Pluto from all other planets.

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The existence of the dwarf planet Pluto was proposed based on irregularities in Neptune's orbit. Pluto was subsequently discovered near its predicted position. But it now appears that the discovery was fortuitous, because Pluto is small and the irregularities in Neptune's orbit were not well known. To illustrate that Pluto has a minor effect on the orbit of Neptune compared with the closest planet to Neptune, answer the following questions. (a) Calculate the acceleration (in m/s2) due to gravity at Neptune due to Pluto when they are 4.70 ✕ 1012 m apart, as they are at present. The mass of Pluto is 1.4 ✕ 1022 kg. (b) Calculate the acceleration (in m/s2) due to gravity at Neptune due to Uranus, presently about 3.00 ✕ 1012 m apart. The mass of Uranus is 8.62 ✕ 1025 kg. Give the ratio of this acceleration to that due to Pluto. acceleration of (b)/acceleration due to Pluto=

The existence of the dwarf planet Pluto was proposed based on irregularities in Neptune’s orbit. Pluto was subsequently discovered near its predicted position. But it now appears that the discovery was fortuitous, because Pluto is small and the irregularities in Neptune’s orbit were not well known. To illustrate that Pluto has a minor effect on the orbit of Neptune compared with the closest planet to Neptune: (a) Calculate the acceleration due to gravity at Neptune due to Pluto when they are 4.50×1012m apart, as they are at present. The mass of Pluto is 1.4×1022kg. (b) Calculate the acceleration due to gravity at Neptune due to Uranus, presently about 2.50×1012m apart, and compare it with that due to Pluto. The mass of Uranus is 8.62×1025kg.

The existence of the dwarf planet Pluto was proposed based on irregularities in Neptune's orbit. Pluto was subsequently discovered near its predicted position. But it now appears that the discovery was fortuitous, because Pluto is small and the irregularities in Neptune's orbit were not well known. To illustrate that Pluto has a minor effect on the orbit of Neptune compared with the closest planet to Neptune: (a) Calculate the acceleration due to gravity at Neptune due to Pluto when they are 4.50×1012 m apart, as they are at present. The mass of Pluto is 1.4×1022 kg . (b) Calculate the acceleration due to gravity at Neptune due to Uranus, presently about 2.50×1012 m apart, and compare it with that due to Pluto. The mass of Uranus is 8.62×1025 kg .