M2_00 - ASTRONOMY 100 Dr. Werner Dppen 12:00, 24 October...

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1 ASTRONOMY 100 Dr. Werner Däppen MIDTERM 2 ______________ 12:00, 24 October 2000 Exam Number Name (Please Print) 1. A given spectral absorption line of iron is observed to have a wavelength of 675.3 nm in a laboratory source, and a wavelength of 675.1 nm in the spectrum of a star. We conclude that this star is ______________ . a) approaching the Earth b) moving away from the Earth c) not moving relative to the Earth d) moving exactly perpendicularly to the line of sight 2. In astronomy, the principal use of the pattern of spectral lines is _____________ . a) to measure temperature b) to measure speed of celestial objects c) to measure distance to celestial objects d) to determine the chemical composition of celestial objects 3. In astronomy, the principal use of the Doppler effect is _____________ . a) to measure temperature b) to measure speed of celestial objects c) to measure distance to celestial objects d) to determine the chemical composition of celestial objects 4. In astronomy, the principal use of the Planck curve is _____________ . a) to measure temperature b) to measure speed of celestial objects c) to measure distance to celestial objects d) to determine the chemical composition of celestial objects
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2 Questions 5 - 7: To answer the next three questions, please select the best answer from the following choices (here, the same answer might be right more than once, but then it might not. ..): a) Venus b) Mars c) Mercury d) Earth 5. ________ is the planet with the greatest orbital speed 6. ________ is the planet with the thickest atmosphere 7. ________ is the planet that has practically no atmosphere 8. A typical lunar mare was formed by _____________ . a) wind erosion b) water erosion c) members of the Moon sect d) the long-term bombardment by meteorites of all sizes e) extensive volcanic lava flows in the first billion years 9. Venus has ___ natural satellites a) 0 b) 1 c) 2 d) 3 e) 4 10. Electromagnetic waves are quantized, that is, whenever they are emitted, their energy is an integer multiple of an elementary energy quantum (photon). Which of the following types of electromagnetic radiation has the lowest photon energy? a) radio b) infrared c) x-ray d) visible light e) ultraviolet 11. Which of the following facts is coincidental, that is, only a consequence of specific values of radii, masses and distances, but not a logical consequence of some physical laws? a) The fact that the Moon shows Earth always the same face b) The relation between periods and semi-major axes of planetary orbits according to Kepler's 3rd law c) The fact that the apparent diameter of the Moon and the Sun (seen from Earth) are about the same d) The fact that tides on Earth are strongest during New and Full Moon
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3 12. Astronauts were putting a seismometer on the Moon in order to study ______________ . 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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M2_00 - ASTRONOMY 100 Dr. Werner Dppen 12:00, 24 October...

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