Which is the smallest particle?
A) molecule
B) atom
C) proton
D) neutron
E) quark
Answer: E
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Consider a wire bent in the hairpin shape shown below. The wire carries a conventional current I as shown. What is the magnitude 
of the magnetic field
at point a? A. ?0 I/4?R B. ?0 I/2?R C. ?0 I/?R D. ?0 I/R E. (2 + ?)?0 I/4?R F. Zero
Which of the following is needed in order to produce a uranium fission bomb?
A) an isotope separation, or enrichment, facility B) plutonium C) deuterium and tritium D) All of the above. E) None of the above.
If ? = 4, which one of the following is a possible quantum number for n?
A) 0 B) 2 C) 3 D) 4 E) 8
A block is at rest on a wooden ramp. The coefficient of static friction between the block and ramp is 0.35. What is the angle between the ramp and the horizontal direction when the box first begins to slide?
A. 17
B. 19
C. 29
D. 20
E. 22