Points A [at (3, 6) m] and B [at (8, ?3) m] are in a region where the electric field is uniform and given by 
N/C. What is the electric potential difference VA?VB?
A. +60 V
B. ?60 V
C. +80 V
D. ?80 V
E. +50 V
Answer: A
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We can model a general cyanine-type dye molecule as if it contained N electrons trapped in a “box”-like potential energy function, where N is some even integer. The energy of a single quanton in a box is given by En = E1n2, where n is an integer and E1 is the energy of the ground (n = 1) energy level. If for a given molecule there are four electrons trapped in the molecule’s “box,” what is the lowest possible total energy of those electrons?
A. Etot = E1 B. Etot = 4E1 C. Etot = 8E1 D. Etot = 10E1 E. Etot = 30E1
According to the photoelectric effect in order to release electrons from a solid, the light incident upon it must:
A) have a high intensity. B) have a low intensity. C) have a long wavelength. D) have a short wavelength. E) None of the above.
How many electrons can be found with principal quantum number n = 3 in a suitably heavy atom?
A) 18 B) 6 C) 20 D) 9
How many significant figures are in 120.07?
A) 6 B) 5 C) 4 D) 3 E) 2