Astronomy II (Astr 1020) Homework #1 - Prof. Richard Ignace, Assignments of Astronomy

Download Astronomy II (Astr 1020) Homework #1 - Prof. Richard Ignace and more Assignments Astronomy in PDF only on Docsity! Astronomy II (Astr 1020) Spring 2008 Prof Richard Ignace HOMEWORK #1 Notes: You will need a calculator, a pencil, and a standard scantron. Each question has one correct answer. Choose the best answer for each. Mark your answer on the scantron. This homework is due at the beginning of class on January 29. Late homeworks will not be accepted. 1. Approximately how many stars are in the Milky Way galaxy? a) dozens b) thousands c) millions d) billions 2. The Earth moves through space around the Sun at about 30 km/s. Convert this to miles per hour (mph). Use the fact that 1 mile equals 1.6 km. a) 67,500 mph b) 30 mph c) 1.6 mph d) 48 mph e) 172,800 mph 3. Who found that Venus shows phases that are consistent with the heliocentric model? a) Kepler b) Copernicus c) Aristotle d) Galileo e) Brahe 4. If a car drives in a circle, does it experience a force? a) There is a net force acting on it directed away from the center of the circle. b) There is a net force acting on it directed toward the center of the circle. c) There is a net force directly ahead of it. d) There is a net force directly behind it. e) There is no net force if it moves with constant speed. 1 5. In space above the Earth, a) your mass drops to zero. b) your weight drops to zero. c) you would experience weightlessness because you are in free-fall. d) you would experience weightlessness because there is no gravity there. 6. You observe the North Star near the horizon, where are you? a) Near the North Pole. b) Near the South Pole. c) Near the equator of the Earth. d) Johnson City. e) Mexico City. 7. Solve the equation y2 = 8. a) y = 2.83 b) y = 4.00 c) y = 8.00 d) y = 16.00 8. Solve the equation y3 = 27 a) y = 3 b) y = 9 c) y = 24 d) y = 81 9. If a new planet were found at 200 Astronomical Units (200 AU), what would its orbital period around the Sun be? a) 34 years b) 200 years c) 300 years d) 2800 years e) 3 billion years 10. The path of the Sun through the constellations over the course of one year is called the a) ellipse. b) edgeomatic. c) ecliptic. d) endgame. e) enigma. 2