EAS1601_Sample_Exam1_B

# EAS1601_Sample_Exam1_B - EAS 1601 Exam 1 Sample B This is a...

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EAS 1601 Exam 1, Sample B This is a sample exam. There is the possibility that the answers here are not correct. Make sure that you carefully determine the correct answers yourself. Although you will be given a formula sheet for the actual exam, all formulae and constants you need for studying are available in your lecture notes.

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NAME:_______________________________ LAB SECTION___________ Page 2 of 5 1. Assume a star and planet system in another Galaxy. The star has a radius of 7 x 10 5 Km and an average surface temperature of 2 x 10 4 K. Planet A orbits the star with an eccentricity that approaches 0, with a semi-major axis of 5 x 10 8 Km. The orbital period of Planet A is equivalent to 2 Earth Years. Planet A has a radius of 7000 km and a mass of 10 25 Kg. Planet B also has an eccentricity approaching 0 and a semi-major axis equal to twice that of Planet A. Answer the following questions about this system: a. What is the mass of the star? [10 Points] () () Kg s s Kg m m M GP R M GM R P GM R P 31 2 7 2 1 3 11 3 11 2 2 3 2 3 2 2 2 1 3 10 85 . 1 10 16 . 3 10 67 . 6 10 5 4 4 4 2 × = × × × × × = = = = π b. What is the orbital period of Planet B? [10 Points] () yr s yr s s Kg s Kg m Km m Km GM R P or yr yr yr P R R P P R R but R R P
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EAS1601_Sample_Exam1_B - EAS 1601 Exam 1 Sample B This is a...

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