A 4.00 kg hollow cylinder of radius 5.00 cm starts from rest and rolls without slipping down a 30.0 degree incline. If the length of the incline is 50.0 cm, then the velocity of the center of mass of the cylinder at the bottom of the incline is
A. 1.35 
B. 1.82
C. 1.57
D. 2.55
E. 3.02
C. 1.57
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As we look at larger and larger scales in the universe, we find:
A) smaller and smaller masses. B) almost exclusively visible matter. C) a larger and larger percentage of the matter is visible. D) a larger and larger percentage of the matter is dark. E) an equal amount of visible and dark matter.
Two identical objects, one light colored and the other dark colored, are at the same cool temperature. Then, you place them outside, on a warm day, in direct sunlight. Which object will warm up faster?
A. The dark one B. Both warm up at the same rate C. The light one D. As strange as it seems, neither object will ever warm up because energy conservation prevents the addition of energy
Helium, He, is a nonmetallic gas and the second element in the periodic table. Rather than being placed adjacent to hydrogen, H, however, helium is placed on the far right of the table because
A) hydrogen and helium repel one another. B) the sizes of their atoms are vastly different. C) they come from different sources. D) helium is most similar to other group 18 elements.
Two objects, A and B, are rubbed together. As a result, object A acquires an excess negative charge while object B becomes positively charged. In comparison to their masses before the charging process, you can say that
A) the mass of both objects increased. B) the mass of A increased and that of B decreased. C) the mass of A decreased and that of B increased. D) the mass of both objects decreased. E) None of the other choices is correct.