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The orbit of Halley's Comet around the Sun is a long thin ellipse. At its aphelion (point farthest from the Sun), the comet is 5.500 × 1012 m from the Sun and moves with a speed of 10.00 km/s. What is the comet's speed at its perihelion (closest approach to the Sun) where its distance from the Sun is 8.400 × 1010 m? The mass of the Sun is 1.987 × 1030 kg

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