Halleys comet which passes around the sun every 76 years, Physics

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Halleys comet which passes around the sun every 76 years

Halley's comet, which passes around the Sun every 76 years, hasan elliptical orbit. When closest to the Sun (perihelion) it is ata distance of 8.823 x 1010 m and moves with a speed of54.6 km/s. The greatest distance between Halley's comet and the Sun(aphelion) is 6.152 x 1012 m.

Part A: Is the speed of Halley's comet greater than or less than54.6 km/s when it is at aphelion? Explain.

Part B: Calculate its speed at aphelion.

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Physics: Halleys comet which passes around the sun every 76 years

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