If you could count stars at a rate of about one per second, how long would it take to count all the stars in the Milky Way Galaxy?
A) several days B) several thousand years
C) several weeks D) several years
B
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A steel beam (E 5 210 GPa) with I 5 119 3 106 mm4 and span length L 5 3.5 m is subjected to uniform load q 5 9.5 kN/m. The maxi-mum deflection of the beam is approximately:
(A) 10 mm
(B) 13 mm
(C) 17 mm
(D) 19 mm
Which of the following best describes the meaning of declination and right ascension?
A) They are coordinates on the celestial sphere that are very similar to the coordinates of altitude and direction on Earth. B) They are used to describe the locations and distances of stars that we see in the night sky. C) They are coordinates on the celestial sphere, with declination telling us the angular distance of an object from the celestial equator and right ascension telling us how far around the celestial sphere an object is located from the vernal equinox. D) They are terms used by astronomers to describe how the sky changes with the seasons.
If the Q-value is greater than zero for a nuclear reaction, the reaction is
A) exoergic B) endoergic C) endothermic D) exdoergic E) not possible