assignment8

# assignment8 - PHYS122 2010W Assignment 8 Due: 17:00...

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PHYS122 2010W Assignment 8 Due: 17:00 Thursday 2010-03-18

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Assignment 8 UW User ID: - Your UW User ID is not the same as your Student Number. Surname: Given Name: 1. (a) (1) The Earth’s orbit is roughly circular ( e = 0 . 017 ) and has a period of one year. The centre to centre average Earth-Sun distance is called an Astronomical Unit (AU). Determine the length of an AU in SI units given that the mass of the Sun is M ± = 2 × 10 30 kg. (b) (1) Determine the radius of Mars’ orbit, in AU, given that it is roughly circular and that its period is about two years. 1 AU = r = (c) (2) If a comet (which orbits the sun in a highly elliptical orbit) has an perihelion of r P and a period of T determine its aphelion, r A and r A = (d) (2) Halley’s comet has a perihelion of 0.6 AU and a period of 76 years. What is its aphelion, r A ? (e) (2) What is the eccentricity, e , of this orbit? (f) (1) What is the speed of the comet at perihelion, v P ? (g)
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## This note was uploaded on 11/14/2010 for the course PHYS PHYS122 taught by Professor O'donovan during the Winter '10 term at Waterloo.

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assignment8 - PHYS122 2010W Assignment 8 Due: 17:00...

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