Part A- Whale communication Blue whales apparently communicate with each other u
ID: 1866256 • Letter: P
Question
Part A- Whale communication Blue whales apparently communicate with each other using sound of frequency 17 9 Hr,w can be heard nearly 1000 km away in the ocean. What is the wavelength of such a sound m seawater, where the speed of sound is 1532 m/s? Part B Dolphin clicks One type of sound that dolphins emit is a sharp click of wavelength 1.50 cm in the occan Wha is the frequency of such clicks? kHz Part C- Dog whistles. One brand of dog whistles claims a frequency of 23.0 kHz for its product. What is the wavelength of this sound? cm Part D- Bats. While bats emit a wide variety of sounds, one type emits pulses of sound having a frequency between 39.0 kHz and 78.0 kHz. What is the range of wavelengths of this sound? Part E- Sonograms. Ultrasound is used to view the interior of the body, much as x rays are untilized. For sharp imagery, the wavelength of the sound should be around one-fourth (or less) the size of the objects to be viewed. Approximately what frequency of sound is needed to produce a clear image of a tumor that is 1.00 mm across if the speed of sound in the tissue is 1550 m's?Explanation / Answer
Solution :
(a) lambda = v/f = 1532/17= 90.118 m
(b) f = v/lambda = 1532/0.015 = 102133. 33 Hz
(c) as v=340m/s, lambda = v/f = 340/23*10^3= 0.01478 m = 1.478 cm
(d) as v=340m/s lambda =v/f = 340/39000 = 8.72 mm
Lambda =v/f = 340/78000 = 4.36 mm
(e) lambda = 1/4= 0.25*10^-3
f=v/lambda = 1550/0.25*10^-3= 6200*10^3= 6.2 MHz
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