EXAM 1 Spring2011 KEY - AST1002 MIDTERM EXAM #1 February...

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1 AST1002 MIDTERM EXAM #1 February 16, 2011 NAME _________________________________________________________________ Signature _________________KEY – Answers in BOLD _________________ THIS IS A CLOSED BOOK, CLOSED CELL PHONE, PDA, ETC. EXAM PLEASE PICK THE ANSWER CLOSEST TO THE ONE YOU COMPUTE (FOR MATH PROBS.) DO YOUR WORK FIRST ON THE EXAM SHEET, AND THEN TRANSCRIBE TO THE BUBBLE SHEET. NOTE THAT THIS EXAM IS PRINTED ON BOTH SIDES!!! c = 3 x 10 8 m/s P 2 y = A 3 AU F = GmM/r 2 c = λ∗ f; λ = c/f; f = c/ λ v = d/t; t = d/v; d = v*t LGP = D 2 α = 0.25 λ /D ( λ in μ m, D in m!) Power = σ T 4 ( σ = 5.67 x 10 –8 W/m 2 K 4 ) T = 2,900,000/ λ max (T in K, λ max in nm) E = mc 2 v = c Δλ/λ
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2 1) What bright planet has the Prof. mentioned on several occasions that is visible high above the western horizon at night? a) Jupiter b) Neptune c) Uranus d) Mercury 2) If you follow by eye a line going from Orion’s sword in the Orion constellation during the winter when Orion is high in the night sky, what very bright object is clearly visible? a) Mercury b) Arcturus c) Mars d) Neptune e) Sirius 3) What demarcation is the beginning and the end of the latitude coordinate of the Earth? a) The West and East longitude sections of the Equator respectively. b) The Celestial Equator. c) The Tropic of Capricorn. d) The Prime Meridian in Greenwich e) The Tropic of Cancer 4) A constellation has what requirement? a) That all the stars are at essentially the same distance from Earth. b) That the stars more or less all have similar right ascension and declination coordinates . c) That constellations must contain exactly 13 stars. d) That the constellations are never named after invertebrate animals. e) That the constellation must contain at least one red giant star. 5) What modification of the Copernican Model did Kepler make, for instance, due to the orbit of Mars? a) He retained the concept of epicycles. b) Like Tycho, his former advisor, he retained the geocentric model, but only for the Sun’s orbit. c) He no longer considered the orbits of the planets to be perfect circles. d) He realized that the axial rotation of all of the planets was in retrograde. 6) How can an astronomer figure out the mass of a planet? a) From the distance and the radius. b) From the temperature and the color c) From the period of its orbit around the sun (or another star) d) From the orbital speed and the color. e) From the period and orbital radius of its moon or satellite (if it has one)
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3 7) The temperature of a star is about 58,000 K. What is the predominant wavelength of the light it emits? (Choose the answer that is closest to the exact answer.) a) About 10 meters. b) About 10 nm (nanometers) c) About 1 centimeter. d)
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This note was uploaded on 03/18/2012 for the course ASTRO AST1002 taught by Professor Jamesbrooks during the Spring '12 term at Florida State College.

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EXAM 1 Spring2011 KEY - AST1002 MIDTERM EXAM #1 February...

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