Generate 20 multiple-choice problems for an introductory acoustics test.  topics include oscillations, resonance, simple harmonic motion, wave properties, inverse square law, huygens' principle, diffraction, superposition, interference, standing waves on strings and in tubes, wave speed in strings, mersenne's laws, and related topics.  questions can be either numerical, symbolic, or fill-in-the blank types of questions. for each question, 5 optional choices should be provided, labeled a) through e).   with the multiple choice answers to each question, be sure to include one correct answer, 3 incorrect answer, and one "None of these" answer (5 options total).   It is allowed to create a question for which "None of these" is the correct answer, in which case the other 4 choices would all be incorrect answer.  Be sure not to list a correct answer more than once in the group of 5 choices.   After each question and 5 multiple choice (possilbe) answers, please identify which answer was correct. Be sure to vary the position of correct answer (e.g. a, b, e, d, c, b, a,...) .   The following are 10 example questions from a Practice Test which you may use as a reference when constructing new questions.: 

Problem 1. (5 points) The speed of light is 3.0e+8 m/s. What frequency of light corresponds to a wavelength of
5.37e-07 m?
a) 2.795e+14 Hz b) 1.3975e+14 Hz c) 161.1 Hz d) 5.59e+14 Hz

Problem 2. (5 points) A CareBear of mass m = 125 g undergoes 17 oscillations per second when attached to a
spring. What is the value of the spring constant k?
a) 13.4 N/m b) None of these c) 487 N/m d) 1430000 N/m e) 1430 N/m

Problem 3. (5 points) A damped oscillator has a Q value of 7.59. If the full width at half max ∆f = 34.2 Hz,
what is the frequency f0?
a) 195 Hz b) 4.51 Hz c) 260 Hz d) 0.222 Hz e) 325 Hz

Problem 4. (5 points) What is the fundemental frequency of an open tube of 3.98 meters?
a) 42 Hz b) 21.7 Hz c) 43.3 Hz d) 687 Hz

Problem 5. (5 points) If a wave has a period of 24 ms, what is the frequency of the wave?
a) 0.024 Hz b) 0.0417 Hz c) 32.7 Hz d) None of these e) 41.7 Hz

Problem 6. (5 points) The phenomenon in which waves bend when moving from one medium with one wave
speed, to another medium with a different wave speed, is called...
a) infraction b) rarefaction c) None of these d) polarization e) diffraction

Problem 7. (5 points) Nikki Sixxxxxxx is playing a stringed instrument with a wire that is 2.38 m long, has a
mass per unit length of 1.94 g/m, and a tension of 20.5 N. What is the frequency of the first overtone?
a) 4460 Hz b) 10.825 Hz c) 43.3 Hz d) 6.17 Hz e) 21.6 Hz

Problem 8. (5 points) You’ve convinced the members of Slipknot to come to church with you, but the music
is bothersome because one of the (fretless) stringed instruments is out of tune. It should be playing a tone of
fA = 204 Hz, but instead it’s playing fB = 224 Hz. You estimate (exactly) that the player is fretting the string
LB = 38.5 cm from the bridge. By how many centimeters should the player move her hand to hit the proper
note? (Hint: i.e., find the difference |LA − LB|.)
a) None of these b) 3.8 cm c) 7.24 cm d) 42.3 cm e) 1.08 cm

Problem 9. (5 points) Reflection off a “rough” surface is known as reflection.
a) inverted b) transverse c) diffuse d) specular e) None of these

Problem 10. (5 points) A sound with intensity I1 = 0.0213 W/m2 at distance r1 = 2.56 m will have what intensity
at r2 = 30.2 m?
a) 0.000153 W/m2 b) 0.00181 W/m2
c) None of these d) 0.251 W/m2
e) 2.96 W/m2

One further request: in a few of the questions, try to include references to currently famous musicians or recording artists.  Go.