A bystander hears a siren vary in frequency from 476 Hz to 404 Hz as a fire truck approaches, passes by, and moves away on a straight street (Fig. 14.21). What is the speed of the truck? (Take the speed of sound in air to be 343 m/s.)
Answer to relevant QuestionsBats emit sounds of frequencies around 35.0 kHz and use echolocation to find their prey. If a bat is moving with a speed of toward a hovering, stationary insect, (a) What is the frequency received by the insect if the air ...An organ pipe that is closed at one end has a length of 0.80 m. At 20 oC, what is the distance between a node and an adjacent antinode for (a) The second harmonic and (b) The third harmonic? An organ pipe that is closed at one end is filled with helium. The pipe has a fundamental frequency of 660 Hz in air at 20oC. What is the pipe’s fundamental frequency with the helium in it? Particles approximately 3.0 x 10-2cm in diameter are to be scrubbed loose from machine parts in an aqueous ultrasonic cleaning bath. Above what frequency should the bath be operated to produce wavelengths of this size and ...Sketch the electric field line pattern that results when a metal slab is placed between a pair of closely spaced, equal (but oppositely charged) parallel plates. (Assume the slab has the same area as the plates and is ...
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