Chapter 14: Sound

Question 1

Audible waves fall within the normal range of hearing of the human ear
Select one:
a. 20 Hz to 20 kHz 
b. 120 Hz to 2000 Hz
c. 120 Hz to 220 Hz

Answer 1

20 Hz to 20 kHz

Question 2

Raising the temperature of air will
Select one:
a. increase the speed of sound in the air.
b. sometimes increase and sometimes decrease the speed of sound in air.
c. not affect the speed of sound in the air.
d. decrease the speed of sound in the air.

Answer 2

increase the speed of sound in the air.

Question 3

Sound waves may be best described as being
Select one:
a. longitudinal waves. 
b. analogous to the water waves.
c. transverse waves.

Answer 3

longitudinal waves.