If a solid has a half-filled valence band, which of the following would it be?
A. a conductor
B. an insulator
C. a semiconductor
D. a p-type semiconductor
E. an n-type semiconductor
A. a conductor
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Series/Parallel Circuits: Three resistors with resistances of 2.0 ?, 6.0 ?, and 12 ? are connected across an ideal dc voltage source V, as shown in the figure. If the total current in the circuit is I = 5.0 A, what is the current through the 12-? resistor?
A. 1.7 A B. 2.5 A C. 0.56 A D. 5.0 A E. 0.75 A
If extra dimensions do exist, why wouldn't we see obvious evidence for them in everyday life?
a) because they affect only the strength of the strong force andnot of any other forces b) They are the same as the dimensions that we do perceive. c) They will only be present in the distant future. d) They were only present at the time of inflation and before. e) They would be quite small and hard to detect.
In general, which type of planet would you expect to cause the largest Doppler shift in the spectrum of its star?
A) a massive planet that is close to its star B) a massive planet that is far from its star C) a low-mass planet that is close to its star D) a low-mass planet that is far from its star
When one travels east while passing over the International Date Line,
a. the date is decreased one day. b. the time is decreased one hour. c. the time is advanced one hour. d. the date is advanced one day. e. none of these occurs.