If a Sound Pulse Is Sent Vertically Downward into the Sea

question 24

Multiple Choice

If a sound pulse is sent vertically downward into the sea and its reflected echo from the seafloor returns 6 seconds later, the depth of the water is _______ meters. (The average speed of sound in seawater is 1500m/sec.)

• A) 3000
• B) 4500
• C) 6000
• D) 9000
• E) 12,000

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