2001 Test 2a - BROCK UN IVERSI TY ASTRONOMY 1F00 Test 2A...

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Unformatted text preview: BROCK UN IVERSI TY ASTRONOMY 1F00 Test 2A, November 14, 2001 Instructor: B. M itrovic 1. Tycho Brahe is known for a) designing the first refracting telescope. b) making very accurate measurements of planetary motion without a telescope. c) formulating the laws of motion. d) writing the Alfonsine tables. 2. Copernicus’ heliocentric model a) explained the phases of the Moon. b) explained the solar eclipses. c) provided a simple explanation of retrograde motion of Mars. d) was based on the observation of stellar parallax. 3. Which of the following astronomers was the first to note that the planets travel in elliptical orbits? a) Copernicus. b) Galileo. c) Kepler. d) Newton. 4. According to Kepler’s second law, a planet moves fastest when it is a) at the greatest distance from the Sun. b) closest to the Sun. c) aligned with two other planets. d) [The speed of a planet does not change at all.] 5. Galileo Galilei is known for a) discovering that the Earth has a spherical shape. b) measuring the radius of the Earth. c) being first to use the telescope in astronomical observations and for his studies of motion. d) providing the evidence that supported the geocentric model of the universe. 6. According to Newton’s laws of motion, there is a nonvanishing net force on a body when a) the body is at rest. b) the body is moving along a straight line with a constant speed. c) the body is changing speed or the direction of motion. d) [None of the above.] 7. If the distance between two bodies is doubled, the gravitational force between them is a) doubled. b) halved. c) unchanged. d) decreased by a factor of 4. 8. Two bodies have equal diameters, but body A has a larger mass than body B. Then a) A has a larger surface gravity than B. b) A has smaller surface gravity than B. c) both A and B have the same surface gravity. d) [None of the above, for there is no simple rule.] 9. Newton’s laws of motion explain Kepler’s empirical laws on planetary motions. a) True. b) False. 10. Two bodies have equal diameters, but body A has a smaller mass than body B. Then a) the escape velocity from A is larger than the escape velocity form B. b) the escape velocity from A is smaller than the escape velocity from B. c) the escape velocities from A and B are equal. d) [None of the above, for there is no simple rule.] 11. If the Sun were to shrink to one-third of its present size but its mass and the distance to the Earth were unchanged, then the new force of the Sun’s gravity on the Earth would be a) three times larger than it is presently....
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This note was uploaded on 06/01/2011 for the course ECON 1P91 taught by Professor Cottrell during the Spring '08 term at Brock University.

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2001 Test 2a - BROCK UN IVERSI TY ASTRONOMY 1F00 Test 2A...

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