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The speed of sound in human tissue is on the order of 1500 m/s. A 3.50-MHz probe is used for an ultrasonic procedure. (a) If the effective phsical depth of the ultrasound is 250 wavelengths, what is the physical depth in meters? (b) What is the time lapse for the ultrasound to make a round trip if reflected from an object at the effective depth? (c) The smallest detail capable of being detected is on the order of one wavelength of the ultrasound. What would this be?

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