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Unformatted text preview: University of Minnesota School of Physics and Astronomy Physics 1301, Fall 2008 Hour Exam 1 Group Problem The sidereal rotation period of the Sun is 25.38 days at the solar equator. Because the Sun is gaseous, the rotation period can be and indeed is somewhat different at other parts of the Sun. However, for this problem, we will use 25.38 days as the rotation period of the Sun. The radius of the Sun is 6.96 x 10 8 m. The distance from the Earth to the Sun is 1.000 Astronomical Units (A.U.) or 1.496 x 10 11 m. The rotation period of the Earth is 1.000 days or 86400 s. The equatorial radius of the Earth is 6378.1 km. (a) What is the angular velocity of the Earths rotation on its axis? [4 points] (b) What is the angular velocity of the Earths orbit around the sun? [4 points] (c) What is the angular velocity of the Suns rotation on its axis? [4 points] (d) What is the linear velocity of a point on the surface of the Earths due to the Earths rotation? [4 points] (d) What is the linear velocity of a point on the Earth due to the Earths orbital motion around the Sun? [4 points] (e) What is the acceleration of a point on the surface of the Earth at the equator due to the rotation of the Earth? How does this acceleration compare to the acceleration of gravity? [5 points] Hour Exam 1 Group Problem The sidereal rotation period of the Sun is 25.38 days at the solar equator. Because the Sun is gaseous, the rotation period can be and indeed is somewhat di erent at other parts of the Sun. However, for this problem, we will use 25.38 days as the rotation period of the Sun. The radius of the Sun is 6 . 96 * 10 8 m . The distance from the Earth to the Sun is 1.000 Astronomical Units (A.U.) or 1 . 496 * 10 11 m . The rotation period of the Earth is 1.000 days or 86400 s. The equatorial radius of the Earth is 6378.1 km.radius of the Earth is 6378....
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This note was uploaded on 07/10/2011 for the course PHYS 1301 taught by Professor Zudov during the Spring '06 term at Minnesota.
 Spring '06
 Zudov
 Physics

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