Imagine that we put a raisin cake into the oven, with each raisin separated from the others by 1 cm. An hour later, we take it out and the distances between raisins are 3 cm. If you lived in one of the raisins and watched the other raisins as the cake expanded, which of the following would you observe?
A) All raisins would be moving away from you at the same speed.
B) More distant raisins would be moving away from you faster.
C) More distant raisins would be moving away from you more slowly.
D) It depends: If you lived in a raisin near the edge of the cake, you'd see other raisins moving away from you, but they'd be coming toward you if you lived in a raisin near the center of the cake.
E) The raisins would be expanding too, so you'd never notice any changes in the cake.
B) More distant raisins would be moving away from you faster.
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The angle of refraction in the glass is 
What is the speed of light in the glass?
A. 
B. 
C. 
D. 
E. 
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A) 4.5 × 10-6 m3 B) 3300 m3 C) 7.4 × 10-4 m3 D) 1400 m3 E) 220,000 m3
Galactic collisions mostly involve interactions between gas and dust clouds rather than individual stars
Indicate whether the statement is true or false
What is the radius of curvature of the path of a 3.0-keV proton in a perpendicular magnetic field of magnitude 0.80 T?
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