1. John, knowing that the speed of sound of particular day is 330ms-1, calls from his fav. cliff top to distant cliff faces. He notes that he hears the echo 1.2s later.
a) What is the distance to the reflecting cliff face?
b) What assumption is made in this calculation
2. A fishing trawler uses a sonar device to track the position of schools of fish in the ocean underneath it. Waves are sent downwards from the trawler. reflected off the bottom, or fish if they present, and received by the trawler. The speed of the sonar waves in ocean water is 1500ms-1
a) if the time interval between receiving and sending a signal is 0.05s, how far under the ship is the school of fish
b) if the signals to the ocean floor prior to finding the fish had taken 0.075s for their total journey, how far from the top of the school of fish is it to the ocean floor?
a) What is the distance to the reflecting cliff face?
b) What assumption is made in this calculation
2. A fishing trawler uses a sonar device to track the position of schools of fish in the ocean underneath it. Waves are sent downwards from the trawler. reflected off the bottom, or fish if they present, and received by the trawler. The speed of the sonar waves in ocean water is 1500ms-1
a) if the time interval between receiving and sending a signal is 0.05s, how far under the ship is the school of fish
b) if the signals to the ocean floor prior to finding the fish had taken 0.075s for their total journey, how far from the top of the school of fish is it to the ocean floor?