lect 18 part 1

lect 18 part 1 - Question81...

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1 In what way is the general theory of relativity more general (deals with more situations) than the special theory? AI t includes accelerated observers but no Question 8 1 gravitation. BI t includes accelerated observers and gravitation. CI t includes only constant, unaccelerated observers. DI t includes only motion at the speed of light. The Principle of Equivalence explains which of the following concepts? (think carefully, use Newton’s law of gravitation) AW e i g h t and mass are the same thing. BEqual masses have equal forces of gravity Question 8 2 causing everything to fall at equal speeds. CT h e force of gravity is equal on all masses. DT h e force of gravity is greater on bodies with a greater mass causing all masses to fall to Earth with the same acceleration. Suppose you were watching an unfortunate fellow astronaut falling into a black hole. Compared to your ship's master clock, the watch on his wrist, as you see it (and while you still can see it), would be running A backward Question 8 3 backwards Bf a s t e r C slower Da t the same rate
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2 Which of the following do astronomers use to discover possible black holes? AD a r k regions in the sky. B Red shifted optical spectra Question 8 4 Red shifted optical spectra. C Spheres of orbiting photons. DS t r o n g X ray emissions. ET h e slowing of clocks. The imaginary surface around a black hole inside which nothing can escape is called the Am a s s limit. B event horizon. Question 8 5 C invisible shell. D singularity. The center of our galaxy lies in the direction of the constellation of AU r s a Minor B Ursa Major Question 8 6 CO r i o n D Cassiopeia E Sagittarius
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3 Population I stars have more heavy elements because Ao ld stars destroy heavy elements as they age. B young stars burn their nuclear fuels faster. Cthe heavy elements were made in previous generations of stars Question 8 7 generations of stars. D heavy elements haven't had time to settle to the core of these younger stars. Population II stars: I )a r e primarily found in the disk of the galaxy; II) contain more heavy metals than Population I stars; III) are primarily old stars; IV) are primarily found in globular clusters and the Question 8 8 core. A III and IV BI and II CI I DI V EI , II and III Which of the following is NOT a characteristic of the stars of the disk component of our galaxy?
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This note was uploaded on 02/06/2011 for the course ASTR 113 taught by Professor Geller during the Spring '08 term at George Mason.

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lect 18 part 1 - Question81...

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