Exam 2 Questions with Answers - Our Solar System | ASTR 101, Exams of Astronomy

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NAME: BUCKNELL UNIVERSITY Astronomy 101 Second Hour Exam 2005 October 19 This exam will be scored on a 100 point scale and has three parts: 1) a multiple choice section containing 6 questions each worth 4 points, 2) a short answer section containing 4 questions each worth 9 points, and 3) a problem section containing 2 problems worth 20 points each. Below are some relationships you might find useful: for a circle: circumference = 2 7 radius area = x radius? for a sphere: volume = 4/3 7 radius? for an ellipse: eccentricity = f/a Kepler’s Third Law: (Period)? = (semi-major axis)® acceleration: . acceleration = change in speed per time ora= oe for circular orbits: speed? = radius x acceleration gravitational acceleration: acceleration = G x pags for constant acceleration: distance = 1/2 acceleration x time” ord =1/2at? gravitational acceleration at the Earth’s surface: 9.8 m/s? 7 . 1 _ 1 1 The lens equation: Focal length — source—lens distance + Tensatmage distance wave speed = frequency x wavelength (i.e., v =v x A) photon energy: Ephoton = *£ i Wien’s Law: Apeak = 3.0x10°K nm om the visible wavelength range: » = 400 — 700 nm Newton's gravitational constant: G = 6.67 x 1071! m3 / kg s? Planck’s constant: h = 6.63 x 10754 Joule seconds radius of the Earth: 6.379 x 10° m 1 Astronomical Unit (A.U.) 1.496 x 101? m the speed of light: c = 3.00 x 108 m/s the speed of sound: 330 m/s The Observer’s Triangle Relation: A tol a 57.3° —