Question

Question 1 Not completo Marked out of 1.00is approaching a school of fish, as shown in the figure below Dolphins emit clicks of sound for communication and echolocation. A marine biologist is monitoring a dolphin swimming in sea water where the speed of sound is 1522 m/s. The dolphin marine biologist dolphin school of fish The marine biologist measures the number of cicks per second to be 2460 Hz. The dolphin is swimming away from the stationary mane toogst at wd = 7.30 m/s. The school of fish is swimming towards the dolphin. Their speed (with respect to the stationary biologist) is V 11.5 What is the frequency of clicks produced by the dolphin? Question 2 Not complete Marked out ot 1.00 F Flag quesion What frequency of clicks are detected by the school of fish? Question 3 Not complete Marked out of 1.00 P Flag question What frequency of clicks does the dolphin detect reflected from the marine biologist? Question 4 Not complete Marked out of 1.00 P Flag question What frequency of clicks does the doiphin dietect reflected from the school of fish? Hz Check Question 5 Not complete Marked out of 100 P Flag question What is the speed of the fish relative to the dolphin? m/s towards the dolphin

Answer 1

Formula Used: f^' = f_0 {V plusminus V_0/V plusminus V_s} { Numerator + if tend to uparrow frequency - for vice versa Denominator + if tend to downarrow frequency - for vice versa} f_0 = Actual Frequency V = speed of sound V_0 = Speed of observer V_s = Speed of source Given, V_d = 1.3 m/s (rightarrow) = 7.3 i^^V_f = 11.5 m/s (leftarrow) = -11.5 i^^V = 15.22 m/s Let actual frequency produced by dolphin be f_0 i) f^' = 2460 Hz Where observer = Man Source = Dolphin Therefore 2460 = f_0 {1522 + 0/1522 + 7.3} Therefore F_0 = 2460 times 1529.3/1522 = 2471.8 Hz ii) o = observer, s = dolphin { o = observer, s = source} Therefore f^1 = f_0 {1522 + 11.5/1522 - 1.3} = 2502.5 Hz iii) First o = Man , s = Dolphin Therefore f^1 = 2460 Hz Now treat f^1 as frequency where o = Dolphin