- 13 Fishermen Can Use Echo Sounders To Locate Schools Of Fish And To Determine The Depth Of Water Beneath Their Vessels 1 (201.69 KiB) Viewed 67 times
13. Fishermen can use echo sounders to locate schools of fish and to determine the depth of water beneath their vessels.
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13. Fishermen can use echo sounders to locate schools of fish and to determine the depth of water beneath their vessels.
13. Fishermen can use echo sounders to locate schools of fish and to determine the depth of water beneath their vessels. An ultrasonic pulse from an echo sounder is observed to return to a boat after 0.200 s. What is the sea depth beneath the sounder? The speed of sound in water is 1.53 x 103 m s-1. (a) 612 m (b) 306 m (c) 153 m (d) 76.5 m Continued overleaf 51 14. Continuing from the previous question, a school of fish swim directly beneath the boat and result in a pulse returning to the boat in 0.150 s. How far above the sea floor are the fish swimming? (a) 5480 m (b) 742 m (c) 115 m (d) 38.3 m
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