CHAPTER 15. SOUND 15.6
- Calculate the frequency (in Hz) and wavelength of the annoying sound made by a
mosquito when it beatsits wings at the averagerate of 600 wing beats per second.
Assume the speed of thesound waves is 344 m·s−^1.
- How does halving the frequency of a wavesource affect the speedof the waves?
- Humans can detectfrequencies as high as 20 000 Hz. Assuming thespeed of sound
in air is 344 m·s−^1 , calculate the wavelength of the sound corresponding to the
upper range of audible hearing.
- An elephant trumpets at 10 Hz. Assuming the speed of sound in air is 344 m·s−^1 ,
calculate the wavelengthof this infrasonic soundwave made by the elephant.
- A ship sends a signal out to determine the depth of the ocean. The signal returns 2,5
seconds later. If sound travels at 1450 m.s−^1 in sea water, how deepis the ocean at
that point?
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(1.) 00sn (2.) 00sp (3.) 00sq (4.) 00sr (5.) 00ss (6.) 00st
(7.) 00su (8.) 00sv (9.) 00sw (10.) 00sx (11.) 00sy (12.) 00sz
(13.) 00t0 (14.) 00t1 (15.) 00t2 (16.) 00t3 (17.) 01xi (18.) 01xj
(19.) 01xk (20.) 01xm (21.) 01xn (22.) 01xp (23.) 01xq (24.) 01xr
(25.) 01xs (26.) 01xt (27.) 01xu
