383_Physics ProblemsTechnical Physics

383_Physics ProblemsTechnical Physics - Chapter 13 P13.6(a...

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Chapter 13 385 P13.6 (a) The Sun-Earth distance is 1 496 10 11 . × m and the Earth-Moon distance is 384 10 8 . × m , so the distance from the Sun to the Moon during a solar eclipse is 1496 10 384 10 1492 10 11 8 11 .. . ×− × = × m m m The mass of the Sun, Earth, and Moon are M S 199 10 30 . k g M E 598 10 24 k g and M M 736 10 22 k g We have F Gm m r SM == ×× × × 12 2 11 30 22 11 2 20 6 67 10 1 99 10 7 36 10 439 10 . . . ej e j e j N (b) F EM = ×⋅ × × × 6 67 10 5 98 10 7 36 10 11 24 22 8 2 20 . . . Nm kg N 22 e j e j (c) F SE = × × × 6 67 10 1 99 10 5 98 10 355 10 11 30 24 11 2 22 . . . N e j e j Note that the force exerted by the Sun on the Moon is much stronger than the force of the Earth on the Moon. In a sense, the Moon orbits the Sun more than it orbits the Earth. The
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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