Ultrasound Ultrasonic
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 ULTRASOUND MACHINE ULTRASONIC 1 MHz 3 MHz  US $174.99
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 ULTRASOUND ULTRASONIC BODY MASSAGER PAIN THERAPY GEL FREE SHIPPING 1 Mhz US $58.95
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 Ultrasound Ultrasonic Therapy Machine US $118.94
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 Infrared Ultrasound Pain Body Slimming Toning Massager US $48.98
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 ULTRASOUND ULTRASONIC INFRARED TONING PAIN MASSAGER US $38.99
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 Infrared Ultrasound 1MHz Toning Body massager US $45.99
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 Ultrasonic Ultrasound Massager Pain Therapy 1 Mhz US $39.99
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 NEW 1000 PORTABLE 1MHz ULTRASOUND SONIC PAIN RELIEF US $64.99
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 New Beauty Body Ultrasonic Massager LE Weight Loss US $66.32
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 ULTRASOUND MACHINE 1 MHz ULTRASONIC US $79.00
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 Ultrasound Ultrasonic MIni Station Pain Body Therapy US $54.99
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 Ultrasonic 1 MHz 3MHz Skin and Full Body Massager Facemate Taiwan Made US $159.00
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 ULTRASONIC ULTRASOUND BODY MASSAGER PAIN THERAPY US $34.99
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 Ultrasonic Ultrasound Infrared EMS Facial Body Massager US $44.79
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 1 3Mhz Photo Rejuvenation Ultrasonic Face Massager US $159.00
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 Ultrasonic Body Beauty Massager Ultrasound Theropy J6 US $31.57
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 NovaSonic Ultrasonic Professional Ultrasound Massager US $159.95
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 Ultrasound Infrared Pain Body Slimming Toning Massager US $45.99
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 New Portable Ultrasound Ultra Sonic Pain Relief Therapy US $159.00
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 Ultrasound Body Pain Therapy Ultrasonic Facial Massager US $46.99
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 NovaSonic Intrasonic Ultrasonic Tennis Elbow Massager US $159.95
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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 $90.34
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 Ultrasound Therapy Pain Control Ultrasonic Massager US $51.99
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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 $94.69
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 Ultrasonic Infrared EMS Massager Wrinkles Pain Aging US $110.49
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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.