Which of the following does not have a precise definition in ...

[tingc95]

Which of the following does not have a precise definition in terms of the physical properties of sound waves?
 a. frequency
  b. intensity
  c. loudness
  d. sound level
  e. wavelength

Question 2

(Do not try the following: it could kill you. This question is only about a hypothetical possibility.) If you were standing below an object emitting a fixed frequency sound falling at terminal velocity, as it approached you, you would hear the sound
 a. drop in frequency.
  b. stay at the same frequency.
  c. increase in frequency.
  d. decrease in loudness.
  e. stay at the same loudness.

[at]

Answer to Question 1

c

Answer to Question 2

b