Photos - Screenshot (76).png 80% Fullscreen 13. Fishermen can use echo sounders to locate schools of fish and to determi

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Photos Screenshot 76 Png 80 Fullscreen 13 Fishermen Can Use Echo Sounders To Locate Schools Of Fish And To Determi 1 (147.54 KiB) Viewed 51 times

Photos - Screenshot (76).png 80% Fullscreen 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 ms-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 13°C Clear G ENG US 9.12 PM 15/05/2022