Approximately how long is the round-trip travel time for 1 cm depth in soft tissue?

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Multiple Choice

Approximately how long is the round-trip travel time for 1 cm depth in soft tissue?

Explanation:
Sound travels in soft tissue at about 1,540 meters per second. For a reflector 1 centimeter away, the one-way travel time is 0.01 meters divided by 1,540 meters per second, which is about 6.5 microseconds. Since the signal must go there and back, the round-trip time is twice that, roughly 13 microseconds. So the approximate round-trip travel time for 1 cm depth in soft tissue is about 13 microseconds.

Sound travels in soft tissue at about 1,540 meters per second. For a reflector 1 centimeter away, the one-way travel time is 0.01 meters divided by 1,540 meters per second, which is about 6.5 microseconds. Since the signal must go there and back, the round-trip time is twice that, roughly 13 microseconds. So the approximate round-trip travel time for 1 cm depth in soft tissue is about 13 microseconds.

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