Ultrasound Ultrasonic
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 ULTRASOUND MACHINE ULTRASONIC 1 MHz 3 MHz  US $174.99
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 Ultrasound Ultrasonic Infrared Pain Toning Massager US $44.49
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 Ultrasonic Ultrasound Massager Facial Body Pain Therapy US $36.98
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 Facemate Beauty Ultrasound Ultrasonic Massager Light US $159.00
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 NEW 1000 PORTABLE 1MHz ULTRASOUND SONIC PAIN RELIEF US $64.99
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 Ultrasound Ultrasonic MIni Station Pain Body Therapy US $54.99
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 Ultrasonic Ultrasound Infrared Body Massager PainRelief US $65.99
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 Ultrasonic Ultrasound Infrared EMS Facial Body Massager US $94.86
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 1 3Mhz Photo Rejuvenation Ultrasonic Face Massager US $159.00
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 ULTRASOUND MACHINE 1 MHz ULTRASONIC US $79.00
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 Ultrasonic Body Beauty Massager Ultrasound Theropy J6 US $31.62
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 ULTRASOUND THERAPY ULTRASONIC TREATMENT MACHINE US $114.99
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 Portable Digital LCD Facial Ultrasonic Skin Scrubber US $39.99
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 Ultrasound Infrared Pain Body Slimming Toning Massager US $45.99
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 New Beauty Body Ultrasonic Massager LE Weight Loss US $66.42
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 NEW Ultrasound Ultrasonic Pain Relief Massager Light US $159.00
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 NovaSonic Ultrasonic Professional Ultrasound Massager US $159.95
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 ULTRASOUND INFRARED TONING BODY PAIN SLIMMING MASSAGER US $38.99
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 NEW PRO PORTABLE 3MHz ULTRASOUND THERAPY MASSAGER MACHINE US $110.46
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 ULTRASONIC ULTRASOUND BODY MASSAGER PAIN THERAPY US $34.95
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 Ultrasound Ultrasonic Infrared Body Massager HS3008R US $274.00
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 Ionic Ultrasound US $179.00
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 NEW ULTRASOUND 1 MHZ PORTABLE PAIN RELIEF MACHINE THERAPY MASSAGER US $90.37
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 Ultrasound Therapy Pain Control Ultrasonic Massager US $51.99
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 3in1 Ultraconic Galvanic Ion Infrared Skin Massager US $145.99
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 Ultrasound Ultrasonic Infrared Body Massager PainRelief US $62.99
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 1 3 Mhz Skin Full Body Ultrasonic Facemate Massager US $159.00
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 Ultrasonic Massager Anti Cellulite Wrinkles Slimming US $94.83
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 Ultrasonic Infrared EMS Massager Wrinkles Pain Aging US $110.65
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 Ultrasonic Ultrasound Body Beauty Massager Therapy 1MHz US $72.96
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What is the Wave Length of a Vampire Bat's Ultrasound if...?
You have become interested in the study of bats (which consume thousands of tons of insects a day). In flight bats emit a range of (ultrasonic) frequencies of sound and use the reflected sound signals for locating the insects they eat. A typical frequency is 45,000 Hz, and the speed of the ultrasound in air is about 344 m/sec. What is the wavelength of the ultrasound in air? Under water dolphins emit sound to communicate. A typical frequency of a bottle-nosed dolphin is about 90,000 Hz. If the wavelength of this sound in water is found to be 1.7 cm, what must be the speed of sound in this water?
a)Velocity V = frequency x wavelength
344 = 45000 x wavelength
wavelength = 344/45000 m
b) V = 90000 x 1.7 cm
this will give your answer in cm/s
or V = 90000 x 0.017m for m/s
I'll let you do the calculations.