A hospital uses an ultrasonic scanner to locatetumours in a tissueThe operating frequency of thescanner is 4.2 MHzThe speed of sound in a tissue is 1.7km/sThe wavelength of sound in tissue is close to[1995]

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A hospital uses an ultrasonic scanner to locatetumours in a tissueThe operating frequency of thescanner is 4.2 MHzThe speed of sound in a tissue is 1.7km/sThe wavelength of sound in tissue is close to[1995]






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