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Unformatted text preview: Astro 1101/1103 Prelim 1 Exam Name ___________________________________________________ Section__________________________________________________ TA ______________________________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) This is version A of the test. Mark circle A as the answer to question 1 A) B) C) D) E) 1) 2) The frequency of a wave is A) measured in hertz (Hz). B) equal to the speed of the wave divided by the wavelength of the wave. C) measured in cycles per second. D) the number of peaks passing by any point each second. E) all of the above 2) 3) If your mass is 60 kg on Earth, what would your mass be on the Moon? A) 10 kg B) 50 kg C) 60 lb D) 60 kg E) 10 lb 3) 4) A microwave oven emits radation at a frequency of 2.45 GHz, which is a rotational transition frequency of water molecules. Many cell phones emit radiation at a frequency of 1.9 GHz. Could your cellphone work at a frequency of 2.45 GHz? A) Yes. B) No, because the water molecules in the air would absorb all the signal C) No, because 2.45 GHz radiation is too weak. D) Yes, because all light is a wave. E) none of the above 4) 5) Right Ascension (RA) increases to the A) South B) East C) North D) West E) None of the above 5) 6) The wavelength of a wave is A) the distance between two adjacent peaks of the wave. B) the distance between a peak of the wave and the next trough. C) how strong the wave is. D) the distance between where the wave is emitted and where it is absorbed. E) equal to the speed of the wave times the wave's frequency. 6) 7) As long as an object is not gaining or losing mass, a net force on the object will cause a change in A) weight. B) velocity. C) direction. D) acceleration. E) speed. 7) 1 8) What would happen if the Earths axis werent tilted? A) We would see the same stars every night B) The same face of the earth would always face the sun C) There would be no lunar eclipses D) There would be no seasons E) There would be no solar eclipses 8) 9) Suppose an object is moving in a straight line at 50 mi/hr. According to Newton's frst law oF motion , the object will A) eventually slow down and come to a stop. B) continue to move in a straight line forever if it is in space, but slow and stop otherwise. C) continue to move in the same way forever, no matter what happens. D) continue to move in the same way until it is acted upon by a force....
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- Fall '07