An acoustical engineer designing a music hall is most concerned with
A) modulation.
B) forced vibrations.
C) resonance.
D) beats.
E) reverberations.
Answer: E
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A white dwarf is composed of
a. hydrogen nuclei and degenerate electrons. b. helium nuclei and normal electrons. c. carbon and oxygen nuclei and degenerate electrons. d. degenerate iron nuclei. e. a helium burning core and a hydrogen burning shell.
What does better angular resolution mean?
a. astronomical objects look larger b. astronomical objects look smaller c. you can see more detail in images d. you can see fainter objects e. none of the above
Complex molecules in the interstellar medium are found:
A) uniformly throughout the disk of the Galaxy. B) scattered evenly throughout the universe, a product of the Big Bang itself. C) only around the supergiant stars like Betelguese that make their heavy atoms. D) primarily in the dense dust clouds. E) on the surfaces of the coolest class K and M stars only.
A modern geologic theory that considers Earth's lithosphere to be made up of moving plates is known as
a. the principle of uniformity. b. the law of superposition. c. the Moho concept. d. plate tectonics.