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3 years ago

10

During World War II, the military imaged the seafloor by sending pulses of sound waves down through the water and measuring the

time it took for the sound to bounce off the seafloor and return to the receiver. This method, illustrated here, is called_____________.

1 answer:

scoundrel [369]3 years ago

3 0

Answer:

D line 4

Explanation:

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