Open QuestionIn the following figure, two interfering waves are drawn at some instance in time. a. Indicate the regions on the graph where constructive interference occurs.b.Indicate the regions on the graph where destructive interference occurs.300views5rank
Multiple ChoiceTwo sinusoidal waves with amplitudes 4.5cm and 3.0cm, respectively, move toward each other on a string and experience superposition. As they move past each other, the displacement of the string from equilibrium is complicated. Considering all positions on the string where the waves are overlapping, what are the largest and smallest magnitudes of the displacement of the string?290views
Multiple ChoiceSuppose you are listening to two tones, one of 50 Hz, and the other of 10,000 Hz. If the sources of these tones are equal in intensity at your location, which do you perceive to have a higher sound intensity level (in dB), and by what factor?270views
Multiple ChoiceYou are standing 3.0m from one speaker and 2.5m from another. Both are emitting identical 680 Hz tones in phase. What best describes what you would observe? Use 340 m/s for the speed of sound.248views
Multiple ChoiceTwo speakers (A and B) lie on the y-axis, 4.0m apart. They emit exactly the same 280 Hz tone in phase with each other. You start right at speaker A and walk in the x-direction. How far from speaker A do you first hear a minimum in sound intensity? Assume the speed of sound in this room is 340 m/s.299views
Textbook QuestionSmall speakers A and B are driven in phase at 725 Hz by the same audio oscillator. Both speakers start out 4.50 m from the listener, but speaker A is slowly moved away (Fig. E16.34). (a) At what distance d will the sound from the speakers first produce destructive interference at the listener's location?739views
Textbook QuestionTwo small stereo speakers are driven in step by the same variable-frequency oscillator. Their sound is picked up by a microphone arranged as shown in Fig. E16.39. For what frequencies does their sound at the speakers produce (a) constructive interference752views
Textbook QuestionTwo loudspeakers, A and B (Fig. E16.35), are driven by the same amplifier and emit sinusoidal waves in phase. Speaker B is 2.00 m to the right of speaker A. Consider point Q along the extension of the line connecting the speakers, 1.00 m to the right of speaker B. Both speakers emit sound waves that travel directly from the speaker to point Q. What is the lowest frequency for which (b) destructive interference occurs at point Q?467views
Textbook QuestionTwo loudspeakers, A and B (Fig. E16.35), are driven by the same amplifier and emit sinusoidal waves in phase. Speaker B is 2.00 m to the right of speaker A. Consider point Q along the extension of the line connecting the speakers, 1.00 m to the right of speaker B. Both speakers emit sound waves that travel directly from the speaker to point Q. What is the lowest frequency for which (a) constructive interference occurs at point Q1054views
Textbook QuestionThe three identical loudspeakers in FIGURE P17.71 play a 170 Hz tone in a room where the speed of sound is 340 m/s . You are standing 4.0 m in front of the middle speaker. At this point, the amplitude of the wave from each speaker is a. c. When the amplitude is maximum, by what factor is the sound intensity greater than the sound intensity from a single speaker?308views
Textbook QuestionThe three identical loudspeakers in FIGURE P17.71 play a 170 Hz tone in a room where the speed of sound is 340 m/s . You are standing 4.0 m in front of the middle speaker. At this point, the amplitude of the wave from each speaker is a. b. How far must speaker 2 be moved to the left to produce a maximum amplitude at the point where you are standing?349views
Textbook QuestionFIGURE EX17.27 shows the circular wave fronts emitted by two wave sources. b. Make a table with rows labeled P, Q, and R and columns labeled r1 ,r2 , Δr , and C/D. Fill in the table for points P, Q, and R, giving the distances as multiples of λ and indicating, with a C or a D, whether the interference at that point is constructive or destructive.276views
Textbook QuestionTwo speakers, emitting identical sound waves of wavelength 2.0 m in phase with each other, and an observer are located as shown in Fig. E35.5. (a) At the observer's location, what is the path difference for waves from the two speakers?2312views1rank
Textbook QuestionTwo radio antennas A and B radiate in phase. Antenna B is 120 m to the right of antenna A. Consider point Q along the extension of the line connecting the antennas, a horizontal distance of 40 m to the right of antenna B. The frequency, and hence the wavelength, of the emitted waves can be varied. (b) What is the longest wavelength for which there will be constructive interference at point Q?354views1rank
Textbook QuestionTwo radio antennas A and B radiate in phase. Antenna B is 120 m to the right of antenna A. Consider point Q along the extension of the line connecting the antennas, a horizontal distance of 40 m to the right of antenna B. The frequency, and hence the wavelength, of the emitted waves can be varied. (a) What is the longest wavelength for which there will be destructive interference at point Q?853views1rank
Textbook QuestionTwo speakers that are 15.0 m apart produce in-phase sound waves of frequency 250.0 Hz in a room where the speed of sound is 340.0 m>s. A woman starts out at the midpoint between the two speakers. The room's walls and ceiling are covered with absorbers to eliminate reflections, and she listens with only one ear for best precision. (c) How far from the center must she walk before she first hears the sound maximally enhanced?302views
Textbook QuestionTwo speakers that are 15.0 m apart produce in-phase sound waves of frequency 250.0 Hz in a room where the speed of sound is 340.0 m>s. A woman starts out at the midpoint between the two speakers. The room's walls and ceiling are covered with absorbers to eliminate reflections, and she listens with only one ear for best precision. (a) What does she hear: constructive or destructive interference? Why?599views
Textbook QuestionTwo small stereo speakers A and B that are 1.40 m apart are sending out sound of wavelength 34 cm in all directions and all in phase. A person at point P starts out equidistant from both speakers and walks so that he is always 1.50 m from speaker B (Fig. E35.1). For what values of x will the sound this person hears be (b) cancelled? Limit your solution to the cases where x … 1.50 m371views
Textbook QuestionTwo small stereo speakers A and B that are 1.40 m apart are sending out sound of wavelength 34 cm in all directions and all in phase. A person at point P starts out equidistant from both speakers and walks so that he is always 1.50 m from speaker B (Fig. E35.1). For what values of x will the sound this person hears be (a) maximally reinforced. Limit your solution to the cases where x … 1.50 m472views1rank
Textbook Question"(II) Suppose two linear waves of equal amplitude and frequency have a phase difference ϕ as they travel in the same medium. They can be represented by ₁ ₂ ω θD₁ = A sin (kx - ωt)D₂ = A sin ( kx - ωt + ϕ).(d) Describe the resultant wave, by equation and in words, if ϕ = π/2 ."98views
Textbook Question(II) The two sources of sound in Fig. 16–15 face each other and emit sounds of equal amplitude and equal frequency (305 Hz) but 180° out of phase. For what minimum separation of the two speakers will there be some point at which (b) complete destructive interference occurs? (Assume T = 20°C .)99views
Textbook Question(I) The two pulses shown in Fig. 15–37 are moving toward each other. (a) Sketch the shape of the string at the moment they directly overlap.<IMAGE>99views
Textbook Question(I) The two pulses shown in Fig. 15–37 are moving toward each other. (c) In Fig. 15–37, at the moment the pulses pass each other, the string is straight. What has happened to the energy at this moment?<IMAGE>105views
Textbook Question(II) Suppose two linear waves of equal amplitude and frequency have a phase difference ϕ as they travel in the same medium. They can be represented by ₁ ₂ ω θD₁ = A sin (kx - ωt)D₂ = A sin ( kx - ωt + ϕ)(b) What is the amplitude of this resultant wave? Is the wave purely sinusoidal, or not?94views
Textbook QuestionDestructive interference occurs where two overlapping waves are 1/2 wavelength or 180° out of phase. Explain why 180° is equivalent to 1/2 wavelength.80views
Textbook QuestionTwo wave pulses are traveling in opposite directions with the same speed of 7.0 cm/s as shown in Fig. 15–45. At t = 0, the leading edges of the two pulses are 15 cm apart. Sketch the wave pulses at t = 1.0 s, 2.0 s and 3.0 s.<IMAGE>63views
Textbook QuestionTwo loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 20 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 60 cm. a. What is the wavelength of the sound?536views
Textbook QuestionTwo loudspeakers in a 20°C room emit 686 Hz sound waves along the x-axis. b. If the speakers are out of phase, what is the smallest distance between the speakers for which the interference of the sound waves is maximum constructive?337views
Textbook QuestionScientists are testing a transparent material whose index of refraction for visible light varies with wavelength as n = 30.0 nm1/2/λ1/2 , where λ is in nm. If a 295-nm-thick coating is placed on glass (n=1.50) for what visible wavelengths will the reflected light have maximum constructive interference?83views
Textbook QuestionTwo pulses are moving in opposite directions at 1.0 cm/s on a taut string, as shown in Fig. E15.34. Each square is 1.0 cm. <IMAGE> Sketch the shape of the string at the end of (b) 7.0 s.81views
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