Can the Firecracker Be Heard? Part A 1 of 20 Review | Constants The decibel scale is logarithmic in intensity: B = 10 log 10 dB In this formula, I is a reference intensity. To convert the intensity of sound waves from SI units to dB, Io is taken to be 10-12 W/m². Once you know the intensity of a source in dB as measured at some reference distance, the intensity at a new distance can be found by subtracting the change in dB appropriate to the ratio of the new distance to the reference distance. The change in dB corresponding to the change in distance may be found by replacing I, in the formula given here with the intensity at the reference distance and replacing I with the intensity at the new distance. We apply the dB scale to a small firecracker that has an intensity of 140 dB at a distance of 1 m. A child sets off the firecracker at a distance of 100 m from the family house. What is the sound intensity ẞ100 at the house? Express the sound intensity in decibels. ▸ View Available Hint(s) Submit dB The child's parents are inside the house talking. A typical house attenuates (reduces the intensity of) outside sounds by a factor of around 40 dB--more at high frequencies (when double-pane windows are closed) and less at low frequencies. Also, a typical conversation has an average sound level of 65 dB. Part B Will the firecracker sound louder than the parents' conversation? yes no Submit Request Answer Provide Feedback Next >

A 4.50 m long rope is stretched between two supports with a tension that makes the speed of transverse waves 60.0 m/s . For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of A bass string. Part A What is the wavelength of the fundamental tone? Express your answer in meters. ? m %3D Submit Request Answer Part B What is the frequency of the fundamental tone? Express your answer in hertz. ? fi = Hz Submit Request Answer Part C What is the wavelength of the second overtone? Express your answer in meters.

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What do you expect from sound heard when you match the resonance frequency of the drinking glass? Would you expect a change in the amplitude, frequency, or wavelength? What is the resonance frequency measured? Use the ruler to measure the length of the drinking glass.

A convertible moves toward you and then passes you; all the while, its loudspeakers are producing a sound. The speed of the car is a constant 8.93 m/s, and the speed of sound is 342 m/s. What is the ratio of the frequency you hear while the car is approaching to the frequency you hear while the car is moving away? Number i eTextbook and Media 2 Save for Later -->> # 3 W e C $ 4 Units S d f X C Attempts: 0 of 3 used Submit Answer 205 % & * ( 6 7 8 9 t y 60 > b כ 8 Apr 30 i O P h j k n m alt ctri

The speed of sound in air is 340 m/s. what is the wavelength of a soundwave that has a frequency of 630 Hz?   Can you Break down equation steps please so I can understand this better

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1 What frequency of sound traveling in air at 32^ = Chas a wavelength of 0.36 m? Calculate to one decimal.