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SampleFinalExam - PHYS 101 FINAL EXAM Dec 10, 2004 Attempt...

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Phys 101 final exam, Dec 10 2004 PHYS 101 FINAL EXAM Dec 10, 2004 Attempt all questions, and show all your work. Calculators and a formula sheet (attached) are allowed. Take g = 9.80 m/s 2 . All problems have equal weight. Good luck ! 1) Earth is in an approximately circular orbit around the Sun, of radius 1.5 x 10 11 m. a) Verify that the angular velocity of the Earth in its orbit around the Sun, in radians/sec, is approximately 2.0 x 10 -7 (take a year to be 365.25 days). b) After an unpleasantly close approach by a large asteroid, the Earth’s orbital radius is reduced to 1.49 x 10 11 m. What is the length of the new Earth year, in days? c) Because the Earth is now closer to the Sun, the polar ice-caps melt. Water from the ice-caps covers the globe uniformly. Apart from the significant damage to life, there is also an effect on the length of the Earth day. Estimate the change in the length of the day if the water from the ice-caps is distributed uniformly as a spherical shell over the Earth’s surface. The polar ice-caps contain about 2.3 x 10
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SampleFinalExam - PHYS 101 FINAL EXAM Dec 10, 2004 Attempt...

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