▼ Part B In general, if a sound has intensity of 3 dB at 1 m from the source, at what distance de from the source would the decibel level decrease to 0 dB? Since the limit of hearing is 0 dB this would mean you could no longer hear it. Express the distance in terms of B. Be careful about your signs! ▸ View Available Hint(s) 195] ΑΣΦ do= 3.55 Submit ? E

A jet plane emits 3.0*10^5 J of sound energy per second. a)What is the sound level 21m away I have attached pictures of Partb and Partc

(Figure 1) is a snapshot graph of a wave at t = 0 s. Figure y (cm) 27 AA 4 8/12 16 20 24 m/s -2 -x (m) 1 of 1 What is the amplitude of this wave? Express your answer in centimeters to two significant figures. A = Submit Part B λ = What is the wavelength of this wave? Express your answer in meters to two significant figures. Submit 15. ΑΣΦ Request Answer Part C ΑΣΦ Previous Answers Request Answer ? X Incorrect; Try Again; 2 attempts remaining What is the frequency of this wave? Express your answer in hertz to two significant figures. cm m

Speakers A and B are vibrating in phase. They are directly facing each other, are 6.91 m apart, and are each playing a 64.2-Hz tone. The speed of sound is 343 m/s. What is the distance from speaker A to the first point on the line between the speakers where constructive interference occurs? Number i Units

Two organ pipes, open at one end but closed at the other, are each 1.10 m long. One is now lengthened by 1.10 cm. Part A Find the frequency of the beat they produce when playing together in their fundamental. Express your answer in hertz. 15. ΑΣΦ fbeat = Submit Request Answer ? Hz

Part E Without actually calculating any logarithms, determine which of the following intervals the sound intensity level of a sound with intensity 3.66 × 10-4 W/m² falls within. ► View Available Hint(s) 30 and 40 dB 40 and 50 dB 50 and 60 dB O 60 and 70 dB 70 and 80 dB 80 and 90 dB O 90 and 100 dB Submit Previous Answers X Incorrect; Try Again; 2 attempts remaining Check the interval that the logarithm falls into. Then, multiply the numbers at each end of the interval by 10 dB. Part F Complete previous part(s) Provide Feedback Next >

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Ⓒ Macmillan Learning Consider the waveform expression. y (x, t) = ym sin (909t+ 0.333x + 3.71) The transverse displacement (y) of a wave is given as a function of position (x in meters) and time (t in seconds) by the expression. Determine the wavelength, frequency, period, and phase constant of this waveform. λ = T = meters seconds f = Φο = Hertz radians

Answer: 1.14 m, open-closed pipe

Review I Constants (Figure 1) shows the displacement of a standing sound wave in a 32-cm-long horizontal tube of air open at both ends. Part C At what distances from the left end of the tube do the molecules oscillate with maximum amplitude? Express your answer numerically. If there is more than one answer, enter your answers in ascending order separated by commas. Hνα ΑΣφ ? cm Submit Previous Answers Request Answer Part D Figure 1 of 1 At what distances from the left end of the tube does the air pressure oscillate with maximum amplitude? Express your answer numerically. If there is more than one answer, enter your answers in ascending order separated by commas. x (cm) 32 = 1 cm Submit Request Answer II