What is an SBc galaxy?
A. An unbarred spiral with tight, smooth spiral arms.
B. A barred spiral with a large bulge.
C. A compact spiral galaxy that is nearly featureless like an elliptical.
D. A compact spiral with spiral arms in between loose and tight.
E. A barred spiral with loose, lumpy spiral arms.
Ans: E. A barred spiral with loose, lumpy spiral arms.
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Which of the following material states has the highest entropy?
(a) Amorphous solid (b) Vapor (c) Liquid (d) Single crystal
Which one of the arrows below most closely indicates the direction of the bob’s acceleration when it is at point 1?
A. A B. B C. C D. D E. E F. F
Quarks have electric charges of magnitude
a. e b. 1/3 e c. 2/3 e d. 0 e. none of the above
If an extrasolar planet suddenly became larger in radius, but kept the same mass and orbit, what would change in the observed Doppler shift of the star?
A) Nothing. The radius of a planet does not affect the Doppler shift. B) The time between peaks in the velocity of the star would decrease. C) The peak velocity of the star would be faster. D) The shape of the velocity curve would become less symmetric. E) The lowest velocity of the star would be slower.