14.6 CHAPTER 14. LONGITUDINAL WAVES
(d) ultrasound
- Which of the following media can sound nottravel through?
(a) solid
(b) liquid
(c) gas
(d) vacuum
- Select a word from Column B that best fits the description in ColumnA:
Column A Column B
A. waves in the air causedby vibrations longitudinal waves
B. waves that move in one direction, but
medium moves in another
frequency
D. waves and medium thatmove in the same
direction
white noise
E. the distance between consecutive points of
a wave which are in phase
amplitude
F. how often a single wavelength goes by sound waves
G. half the difference between high points
and low points of waves
standing waves
H. the distance a wave covers per time inter-
val
transverse waves
I. the time taken for onewavelength to pass
a point
wavelength
music
sounds
wave speed
- A longitudinal wavehas a crest to crest distance of 10 m. It takes thewave 5 s to
pass a point.
(a) What is the wavelength of the longitudinal wave?
(b) What is the speed of the wave?
- A flute produces a musical sound travelling at a speed of 320 m.s−^1. The frequency
of the note is 256 Hz. Calculate:
(a) the period of the note
(b) the wavelength of the note
- A person shouts at acliff and hears an echo from the cliff 1 s later. Ifthe speed of
sound is 344 m·s−^1 , how far away is the cliff?
- A wave travels from one medium to another and the speed of the wave decreases.
What will the effect be on the ... (write only increases, decreases or remains the
same)
(a) wavelength?
(b) period?
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(1.) 00sc (2.) 00sd (3.) 00se (4.) 00sf (5.) 00sg (6.) 00sh
(7.) 00si
