Which wave causes the medium to vibrate only in a direction parallel to the wave’s motion?
a. a transverse wave
b. a surface wave
c. a longitudinal wave
d. none of the above

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.

Matter that emits no light at any wavelength is called