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Unformatted text preview: Instructions Each multiple choice question has one answer. Mark the closest answer. Points are not subtracted for incorrect answer. Circle the correct answer on these test sheets. Make sure it is clear which answer you have marked. Limit your answer to the last two questions in the provided space. After grading the instructor will return this test with your grade back to you. Anyone discovered to have cheated will fail the course. Useful information 1 hour = 3600 sec. 1 year = 3.16 10 7 sec. c = 3 10 8 m/sec = 3 10 5 km/sec n-nano = 10-9 . - mico = 10-6 . m-mili = 10-3 . k-kilo = 10 3 . M-mega = 10 6 . 1 AU = 1.53 10 11 m = 1.53 10 8 km. 1 ly = 9.5 10 15 m = 9.5 10 12 km. p 2 = a 3 . F = Gm 1 m 2 /d 2 . F=ma. W = mg. G = 6.67 10-11 Nm 2 /kg 2 . t(time) = Distance/velocity. Perihelion = a(1-e); aphelion a(1+e) M = 4 R /(GP ). Mp 2 = a 3 . E = h f = hc/ . f = c. v r / c = / . v esc = (2GM/R) . v(gas molecule) ~ (T/M) . W / W(Earth) = [M/M(Earth)]/[R/R(Earth)] v esc / v esc (Earth) = ([M/M(Earth)]/[R/R(Earth)]) . (arc sec) = 11.6 / D(diam in cm). (arc sec) = 0.02 (nm) / D(cm). M = f o / f e . K = C + 273; max (cm) = 0.29 / T(K). E = F(lux)A(rea) E = A T 4 . Small angle (arc sec) = 206,000 Size(d) / Dist(D). Density = Mass / volume. Circumference = 2 r. Area (circle) = r 2 . Area (sphere) = 4 r 2 . Volume (sphere) = (4/3) r 3 . 1. Light year is a measure of a. Light intensity b. Time c. Distance d. The length of time in a year. 2. Why do astronomers use Astronomical Unit (AU)? a. It is a convenient unit of length for planetary distances . b. The significance of this unit is lost in history. c. It is the only unit that relates speed of light to distance. d. Newtons Law of Gravity is simplifies when using this unit. 3. The speed of radio waves in space is: a. Slower than the speed of X rays. b. The same as speed of visible light. c. Less than the speed of ultraviolet rays. d. All of the above are true statements. 4. Which one of the following statements on constellations is FALSE ? a. The sky is divided into 88 constellations. b. Astronomers use constellations as a rough coordinate system. c . The constellations will have the same pattern, no matter how far the observer is in our galaxy. d. The brightest star in a constellation is given the designation . 5. The reason we have seasons on Earth is: a. The distance of the Earth from the Sun is farthest during winter and closest during the summer. b. The speed of the Earth around the Sun changes, and is fastest during the winter, so Earth spends less time getting the sunlight....
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This note was uploaded on 04/22/2008 for the course AST 1002 taught by Professor Gerstein during the Spring '08 term at FSU.
- Spring '08