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# abril (ama4294) - Homework Assignment 14 - kilic - (57110) This print-out should have 19 questions. Multiple-choice questions may continue on the

I need help on number 9 and 10 please.

abril (ama4294) – Homework Assignment 14 – kilic – (57110) 2 0 bat f v What is the detected frequency? 1. f 1 = v s + v bat v s f 0 2. f 1 = v s - v bat v s f 0 3. f 1 = 2 v s v s - v bat f 0 4. f 1 = f 0 5. f 1 = v s + v bat v s - v bat f 0 6. f 1 = 2 v s v s + v bat f 0 7. f 1 = v s - v bat v s + v bat f 0 8. f 1 = v s v s - v bat f 0 9. f 1 = v s v s + v bat f 0 007 (part 2 of 3) 10.0 points Now the reFected sound has a frequency f 1 and is moving towards the bat. What is the frequency f new which the bat hears? 1. f new = 2 v s v s + v bat f 1 2. f new = v s - v bat v s f 1 3. f new = v s - v bat v s + v bat f 1 4. f new = v s + v bat v s f 1 5. f new = v s v s - v bat f 1 6. f new = f 1 7. f new = v s v s + v bat f 1 8. f new = 2 v s v s - v bat f 1 9. f new = v s + v bat v s - v bat f 1 008 (part 3 of 3) 10.0 points Now assume the bat detects f new = 3 2 f 0 . What is the speed of the bat? 1. v bat = v s 2. v bat = 3 4 v s 3. v bat = 1 2 v s 4. v bat = 1 4 v s 5. v bat = 1 2 v s 6. v bat = 3 2 v s 7. v bat = 1 3 v s 8. v bat = 1 5 v s 009 (part 1 of 5) 10.0 points A student, standing near a straight road, records the sound of a car’s horn. The recorded frequency (as a function of the car’s position along the road) is plotted in the ±g- ure below. The same car made four trial runs along the road. Each trial was made with the car traveling at a constant speed. The four re- sults are plotted below, denoted by the curves F , N , Y , and P .
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