Question: Sonar is used to map the ocean floor If an
Sonar is used to map the ocean floor. If an ultrasonic signal is received 2.0 s after it is emitted, how deep is the ocean floor at that location?
Answer to relevant QuestionsTwo sound sources have intensities of and 10-6 W/m2, respectively. Which source is more intense and by how many times more? If the distance to a sound source is halved, (a) Will the sound intensity level change by a factor of (1) 2, (2) 1/2, (3) 4, (4) 1/4, or (5) none of the preceding? Why? (b) What is the change in the sound intensity level? At a distance of 12.0 m from a point source, the intensity level is measured to be 70 dB. At what distance from the source will the intensity level be 40 dB? What is the frequency heard by a person driving directly toward a factory whistle (f = 800Hz) if the air temperature is 0oC? A fighter jet flies at a speed of Mach 1.5. (a) If the jet were to fly faster than Mach 1.5, the half-angle of the conical shock wave would (1) increase, (2) remain the same, (3) decrease. Why? (b) What is the half-angle ...
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