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Unformatted text preview: Astro 1101/1103 Prelim 1 Sample 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) 2) If your mass is 60 kg on Earth, what would your mass be on the Moon? A) 60 lb B) 60 kg C) 10 lb D) 50 kg E) 10 kg 3) What is the Sun mainly made of? A) oxygen and carbon B) carbon and nitrogen C) hydrogen and helium D) hydrogen and oxygen E) nearly equal portions of all the elements 4) By locating the north celestial pole (NCP) in the sky, how can you determine your latitude? A) The altitude of the NCP is your angular distance from the North Pole. B) The azimuth of the NCP is the same as your latitude. C) The altitude of the NCP is the same as your latitude. D) The azimuth of the NCP is the angular distance from the North Pole. E) The altitude of the NCP is the same as your distance from the North Pole. 5) If two objects are the same size but one object is 3 times hotter than the other object, the hotter object emits A) 3 times more energy. B) 9 times more energy. C) 12 times more energy. D) 81 times more energy. E) none of the above 6) Considering Einstein's famous equation, E = mc 2 , which of the following statements is true ? A) It takes a large amount of mass to produce a small amount of energy. B) A small amount of mass can be turned into a large amount of energy. C) One kilogram of mass represents 1 joule of energy. D) You can make mass into energy if you can accelerate the mass to the speed of light. E) Mass can be turned into energy, but energy cannot be turned back into mass. 7) Approximately what RA is on the Meridian at 9:00pm tonight (Sept 24) A) 8:00 hr B) 20:00 hr C) 12:30 hr D) 0:00 hr E) None of of the above 1 8) We can see each other in the classroom right now because we A) emit visible light. B) emit thermal radiation. C) emit infrared light. D) reFect visible light. E) reFect infrared light. 9) A supernova explosion has a luminosity of 10 37 Watts. It lasts for about one month. In that time, how much energy does the superova radiate? A) 30 x 10 41 ergs B) 10 37 Joules C) 2 x 10 43 Joules D) Nothing E) 10 37 Watts 10) An atom in an excited state contains more of what type of energy than the same atom in the ground state ?...
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- Fall '07