When a source of sound approaches, measurements will show an ...

[FButt]

When a source of sound approaches, measurements will show an increase in the sound's
 
  1) speed,
  2) frequency,
  3) wavelength,
  4) all of these,
  5) none of these,
 
  and when a source of sound recedes, measurements will show an increase in the sound's
  6) speed.
  7) frequency.
  8) wavelength.
  9) all of these.
  10) none of these.

Question 2

Compared to a soft sound, the speed of a loud sound is
 
  1) less,
  2) greater,
  3) the same,
 
  and compared to low-frequency sound, higher-frequency sound travels
  4) more slowly.
  5) faster.
  6) the same speed.

[frre432]

Answer to Question 1

Answer: 2, 8

Answer to Question 2

Answer: 3, 6

[FButt]

TYSM

[kthug]

Gracias!