ASTR102 f06 final exam

ASTR102 f06 final exam - ASTRONOMY 102 ‘ FINAL...

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Unformatted text preview: ASTRONOMY 102 ‘ FINAL EXAMINATION 1) How much longer will the solar system efist‘bfifbre the Sun becomes a red giant? @10 billion yrs b) 1 billion yrs 0) 5 billion yrs d) 14 billion yrs e the sun will never become a red giant — it’s too small 2) Jupiter. is 5.2 AU from the sun. What is it’s period of revolution? ~- a) 3 yrs 4 b) 2.3 yrs @140 yrs d) 12 yrs ' e) none of these 3) What force causes the radioactive decay of Co-fiQ? a) em weak c) strong (1) gravity e) electric alone 4) In the Superkamiokande experiment in Japan, what medium is used to capture neutrinos? a) HDO b) HTO @pure deuterium d) Fe' water 5) A star has parallax 0.2”. How far away is it? a) 0.5 pc 5 pc c) 2 pc (1) 1 pc 6) 2.65 pc 6) To what spectral class does Betelgeuse, in Orion, belong? is QM .b)K\ c)A d)B e)O 7) Pick the star that is the brightest supergianti a) Sun b) Sirius @Rigel d) Polaris e) Betelgeuse 8) A 40 solar mass star will probably end up as: a) red giant b) BH 0) n'star (1) BD e) will evaporate *3 @134 “‘73???” U 9) Star X is 3 times as hot as star Y, and has radius twice as large. What is the ratioXof Px/Py? a)3 6 b) 162 c) 6 ‘ (if/324 e) none of these 10) What is likely to be the ultimate fate of the sun (far, far in the future)? @BD b) n-star 0) BH d) red giant e) WD 11) What kind of star is a Cepheid variable? a) blue giant b) red giant @ellow giant d) WD e) n-* 12) What is thought to cause gamma°ray bursters? \aLBH swallowing matter from companion star R?) new galaxy forming c) 2 n-stars in collision galaxies in collision \e) SNOVA 13) What is likely to be left after a Type-I SNOVA? V a) WD b) n-star c) BD (1) BH @ nothing I 14) To what luminosity class does Betelgeuse belong to? a) V b) II d) Iab e) Ib 15) A star has mass of 3 solar masses, and is on the main sequence. How luminous is it, in terms of solar luminosity? 9 a) 9 b) 3 c) 81 @27 e) none of these L (:5 z 9:7 16) What particle carries off most energy in a Type-II SNOVA? @neutrino b) photon c) electron d) proton e) neutron 17) What forms the crust of a n-star? an) electron degenerate gas e c) n-superfluid d)solidballofn I ‘ and He 18) What kind of radiation, signals that matter from a normal companion star has fallen onto a BH? ’ ’ a) X‘rays b) much visible light c) gamma'rays @UV e) radio waves 7 19) Which type of galaxy has most gas and dust? a) elliptical b) spiral @irregular @ An Sc galaxy has: \aLlarge nucleus and several spiral arms mall nucleus and several spiral arms arge barred nucleus and 2 spiral arms Mmall barred nucleus and 2 spiral arms /e)’ it just looks like a huge nucleus 21) Suppose the Hubble constant is 80 (kms/s)/Mpc, and is matter dominated. How old is the Universe? 086 : 1 H a) 12 billion yrs 18 billion yrs c) 28 billion yrs D a, £1 4(Mo‘s) . d) 24 billion yrs e) none of these : 3* ‘0 (33“ I ‘aumw 303910" 22) Seyfert galaxies are usually! a) ellipticals @spirals c) irregulars 23) What did geprge Smoot discover that is considered a convincing piece of evidence for the Big Bang model? smooth CBR c) neutrinos a) v = Hubble constant x distance a erturbations from Hubble Law (1) anisotropies in CBR 24) Pick the shape that, in 2-dimensions, has positive curvature. a) flat piece of paper balloon c) saddle 25) What constitutes dark energy? a) WIMPs b) MACHOs c) heavy neutrinos d) energy associated with a phase transition a» unno “\ All questions are worth 2 points, except the last, which is worth a Nobel Prize, but will have to be graded by someone other than me, because I dunno. Have a good summer. ...
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This homework help was uploaded on 02/07/2008 for the course ASTR 102 taught by Professor Staff during the Fall '06 term at Cal Poly.

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ASTR102 f06 final exam - ASTRONOMY 102 ‘ FINAL...

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