M1_00 - ASTRONOMY 100 Dr. Werner Dppen 12:00, 26 September...

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ASTRONOMY 100 Dr. Werner Däppen MIDTERM 1 ______________ 12:00, 26 September 2000 Exam Number Name (Please Print) 1. An important characteristic of the scientific method, as exemplified by astronomy, is that it ______________________. a) is objective and independent of imagination b) reveals absolute truth c) gives us a basis for distinguishing right from wrong, good from evil d) enables us to obtain increasingly accurate predictions and deeper explanations 2. A solar day is __________ minutes longer than a sidereal day. a) 4 b) 8 c) 15 d) 1 e) 2 3. Who concluded from observations of lunar eclipses that the Earth is a sphere? a) Ptolemy b) Plato c) Aristarchus d) Aristotle e) Eratosthenes 4. Total and partial solar eclipses do not occur every New Moon, because a) the Moon is sometimes too far away from the Earth b) the Sun is sometimes too far away from the Earth c) the Moon's orbit is inclined with respect to the orbital plane of the Earth d) the Moon does not move in a plane 5. Which is the celestial coordinate that is measured along the celestial equator, from the vernal equinox in Eastward direction? a) zenith b) celestial meridian c) altitude d) declination e) right ascension
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6. An angle of 3 h right ascension corresponds to ____________ degrees? a) 30 o b) 3 o c) 45 o d) 90 o e) 60 o Questions 7-10: Match the appropriate law with its best description in the following four questions a) Newton's law of universal gravitation b) Newton's 1st law of motion c) Newton's 2nd law of motion d) Newton's 3rd law of motion e) Murphy's law 7. _________ is the main reason why the Earth can keep the Moon in orbit. 8. _________ states that the Moon would leave its orbit on a straight line if there were suddenly no attracting force. 9. _________ states that the acceleration of an object is proportional to the total force action upon it. 10. _________ states that if object A exerts a force on object B, then object B also exerts a force on object A, of equal strength and opposite sign. Earth 11. Newton achieved the completion of the astronomical revolution, because he ______________. a) could derive Kepler's laws from the laws of physics, using calculus b) discovered the nature of light c) explained what gravity really is d) made the first accurate predictions of the positions of planets with a heliocentric model 12. Which astronomical phenomenon allowed the first measurement of the speed of light? a) a solar eclipse b) the periodic motion of Jupiter's moons c) the phases of Venus d) the sundial effect appearing in the shadows cast by the craters on the Moon
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13. What makes light different from sound-, water-, and seismic waves? The fact that it a) has a wavelength b) has a frequency c) has a wave speed d) does not need a medium to propagate 14. In a wave, ____________ is propagated with the wave speed. a)
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This note was uploaded on 06/26/2009 for the course ASTR 100Lxg taught by Professor Dappen during the Fall '07 term at USC.

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M1_00 - ASTRONOMY 100 Dr. Werner Dppen 12:00, 26 September...

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