A ray of light enters an equilateral prism made of material with n = 1.45 at an angle of incidence 
The internally refracted ray is parallel to the base of the prism. What is the angle of refraction for the ray leaving the prism?
A. 46.5 
B. 30.0 
C. 20.2 
D. 15.7 
E. the ray won't leave the prism
A. 46.5
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The planar atom density of the (100) plane of a FCC metal is ______________atoms divided by the square of the lattice parameter.
Fill in the blank(s) with the appropriate word(s).
Two identical particles, each with a mass of 2.0 ?g and a charge of 25 nC, are released simultaneously from rest when the two are 4.0 cm apart. What is the speed of either particle at the instant when the two are separated by 10 cm?
a. 7.3 m/s b. 9.8 m/s c. 9.2 m/s d. 6.5 m/s e. 4.6 m/s
Consider a conducting bar that is free to slide along conducting rails in an upward magnetic field as shown in the diagram below. We push the bar so that it moves to the right at a constant speed. Which way will current flow through the bar, the rails, and the light bulb?
A. Clockwise
B. Counter-clockwise
C. No current flows at all.
Compared to our Sun, most stars in the halo are
A) old, red, and bright and have fewer heavy elements. B) old, red, and dim and have many more heavy elements. C) young, red, and dim and have fewer heavy elements. D) old, red, and dim and have fewer heavy elements. E) young, blue, and bright and have many more heavy elements.