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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The Answer of 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

If a Sound Pulse Is Sent Vertically Downward into the Sea