If the principal quantum number of an electron is n = 5, which one of the following is NOT an allowed magnetic quantum number ml for the electron?
A) 2 B) 4 C) 0 D) 3 E) 5
E
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Two water waves, call them X and Y, have the same amplitude but different wavelengths: X has a longer wavelength than Y. Regarding their frequencies and their energies,
A) X has the larger (higher) frequency and carries the greater energy. B) Y has the larger frequency and X carries the greater energy. C) Y has the larger frequency and carries the greater energy. D) X has the larger frequency and Y carries the greater energy. E) Y has the larger frequency and the two waves carry the same energy.
The experimental observation(s) below that require(s) a quantum explanation for the photoelectric effect
a. is that more photoelectrons are emitted when the light frequency increases. b. is that the maximum kinetic energy of the photoelectrons is related linearly to the frequency of the light. c. is that every metal surface has a work function, a minimum amount of energy needed to free electrons. d. is that the stopping potential measures the kinetic energy of the photoelectrons. e. are all of the above.
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Answer the following statement true (T) or false (F)
A 0.16 pF parallel-plate capacitor is charged to 10 V. Then the battery is disconnected from the capacitor. When 1.00 × 107 positive charges of magnitude |e| are now placed on the positive plate of the capacitor, the voltage between the plates changes by
A. ?5.0 V. B. ?1.1 V. C. 0 V. D. +1.1 V. E. +5.0 V.