Submarine A travels horizontally at 11.5 m/s through ocean water. It emits a son
ID: 2272353 • Letter: S
Question
Submarine A travels horizontally at 11.5 m/s through ocean water. It emits a sonar signal of frequency f = 5.26 103 Hz. in the forward direction. Submarine B is in front of submarine A and traveling at 3.5 m/s relative to the water in the same direction as submarine A. A crewman in submarine B uses his equipment to detect the sound waves ("pings") from submarine A. We wish to determine what is heard by the crewman in submarine B. Use the following equation. f ' = v + v0 v ? vs f (a) An observer on which submarine detects a frequency f ' as described by the equation above? Submarine A Submarine B Correct: Your answer is correct. (b) In the equation above, should the sign of vS be positive or negative? positive negative Correct: Your answer is correct. (c) In the equation above, should the sign of vO be positive or negative? positive negative Correct: Your answer is correct. (d) In the equation above, what speed of sound should be used? the speed of sound in air, 343 m/s the speed of sound in seawater, 1533 m/s the speed of sound in steel, 6000 m/s Correct: Your answer is correct.
(e) Find the frequency of the sound detected by the crewman on submarine
B. (Express your answer to four significant figures.) WebAssign will check your answer for the correct number of significant figures. Hz
JUST NEED HELP WITH PART E!!
Explanation / Answer
correct formula for f'=f*(V-Vo)/(V+Vs)=5.26x10^3*(1533-3.5)/(1533+11.5)=5208.91Hz.