Inquiry into Physics
8th Edition
ISBN: 9781337515863
Author: Ostdiek
Publisher: Cengage
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Chapter 6, Problem 24Q
To determine
How does a low frequency sound wave affect the balloon’s size?
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At one atmospheric pressure and at a temperature
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cannon is fired some distance away from you, and you wishto estimate that distance by determining how much soundenergy enters your ear. (a) How does the sound energydepend on the distance between the cannon and your ear?(b) Now you use the dependence you described in part a tojudge how far away the cannon is. First you estimate the distanceassuming that none of the energy in the sound wavesis dissipated (into, say, random motion of the molecules thatmake up the air), and then you repeat the estimate assumingthat some of the sound energy is dissipated. Is your first estimatehigher or lower than your second estimate?
Chapter 6 Solutions
Inquiry into Physics
Ch. 6 - An astronomer measures the speed of recession of a...Ch. 6 - Prob. 2AACh. 6 - Prob. 1MACh. 6 - Prob. 1PIPCh. 6 - Prob. 2PIPCh. 6 - Prob. 1MIOCh. 6 - Prob. 1QCh. 6 - (Indicates a review question, which means it...Ch. 6 - (Indicates a review question, which means it...Ch. 6 - (Indicates a review question, which means it...
Ch. 6 - Prob. 5QCh. 6 - Prob. 6QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 8QCh. 6 - Prob. 9QCh. 6 - Prob. 10QCh. 6 - Prob. 11QCh. 6 - Prob. 12QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 14QCh. 6 - (Indicates a review question, which means it...Ch. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 17QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 19QCh. 6 - Prob. 20QCh. 6 - Prob. 21QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 23QCh. 6 - Prob. 24QCh. 6 - Prob. 25QCh. 6 - Prob. 26QCh. 6 - Prob. 27QCh. 6 - Prob. 28QCh. 6 - Prob. 29QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 31QCh. 6 - Prob. 32QCh. 6 - Prob. 33QCh. 6 - Prob. 34QCh. 6 - Prob. 35QCh. 6 - Prob. 36QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 38QCh. 6 - Prob. 39QCh. 6 - Two children stretch a jump rope between them and...Ch. 6 - The force stretching the D string on a certain...Ch. 6 - What is the speed of sound in air at the normal...Ch. 6 - The coldest and hottest temperatures ever recorded...Ch. 6 - A 4-Hz continuous wave travels on a S1ink. If the...Ch. 6 - A 500-Hz sound trave1s through pure oxygen. The...Ch. 6 - Prob. 7PCh. 6 - What frequency of sound traveling in air at 20°C...Ch. 6 - Prob. 9PCh. 6 - . What is the wavelength of 3.5 million Hz...Ch. 6 - . The frequency of middle C on the piano is 261.6...Ch. 6 - . A cable with total length 30 m and mass 100 kg...Ch. 6 - . In a student laboratory exercise, the wavelength...Ch. 6 - . A 1,720-Hz pure tone is played on a stereo in an...Ch. 6 - . A person stands directly in front of Iwo...Ch. 6 - . Ultrasound probes can resolve structural details...Ch. 6 - . A sonic depth gauge is placed 5 m above the...Ch. 6 - . The huge volcanic eruption on the island of...Ch. 6 - . A baseball fan sitting in the cheap seals” is...Ch. 6 - . A geologist is camped 8,000 m (5 miles) from a...Ch. 6 - . A person stands at a point 300 m in front of the...Ch. 6 - . A sound pulse emitted underwater reflects off a...Ch. 6 - . The sound level measured in a room by a person...Ch. 6 - . Approximately how many times louder is a 100-dB...Ch. 6 - Prob. 25PCh. 6 - . The frequency of the highest note on the piano...Ch. 6 - Prob. 1CCh. 6 - Prob. 2CCh. 6 - Jack and Jill go for a walk along an abandoned...Ch. 6 - Prob. 4CCh. 6 - An entrepreneur decides to invent and market a...Ch. 6 - Prob. 6CCh. 6 - Prob. 7CCh. 6 - The frequency of the lowest note played on a flute...Ch. 6 - Prob. 9C
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- (a) Seismographs measure the arrival times of earthquakes with a precision of 0.100 s. To get the distance to the epicenter of the quake, geologists compare the arrival times of S- and P-waves, which travel at different speeds. If S- and P-waves travel at 4.00 and 7.20 km/s, respectively, in the region considered, how precisely can the distance to the source of the earthquake be determined? (b) Seismic waves from underground detonations of nuclear bombs can be used to locate the test site and detect violations of test bans. Discuss whether your answer to (a) implies a serious limit to such detection. (Note also that the uncertainty is greater if there is an uncertainty in the propagation speeds of the S- and P-waves.)arrow_forwardSuppose a bat uses sound echoes to locate its insect prey, 3.00 m away. (a) Calculate the echo times for temperatures of 5.00ºC and 35.0ºC .(b) What percent uncertainty does this cause for the bat in locating the insect? (c) Discuss the significance of this uncertainty and whether it could cause difficulties for the bat.(In practice, the bat continues to use sound as it closes in, eliminating most of any difficulties imposed by this and other effects, such as motion of the prey.)arrow_forwardIn our model of sound we found (in a homework assignment) that the maximum molecular displacement sm, for sound in air, is much smaller than the distance between neighboring air molecules. From this fact we learn .. (circle the best answer) (a) ... that the validity of the model has broken down. (b) ... that sm describes the average position of very many molecules and is mean- ingful even when this is smaller than the microscopic scale of the material. (c) ... that apparently what matters is the tiny fraction of molecules that happen to be very close to others. (d) ... that some of what gets taught in 2214 is a gross oversimplification and falls apart under more careful scrutiny.arrow_forward
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- A sound wave in air has a frequency of 409 Hz. What is its wavelength? Calculate the wavelength for a sound wave with a frequency of 454 Hz?arrow_forwardSound intensity, B. in decibels (d B) is defined as B = 10 log(), where I is the intensity of the sound measured in watts per square metre (") and Io is 10-12 W, the threshold of hearing. Tracey decided that she needed a new vehicle, as her old one was beginning to run poorly and make extremely loud noises while the engine ran. When she got her new vehicle, she measured the relative sound intensities of the vehicles running and found that her old vehicle was 23 times as intense as the sound of her new vehicle. If the decibel level of her new car is 79 d B, what is the decibel level of the old car? Show your full solution method on your work sheet. In the answer field, express your answer to the nearest decibel. Answer:arrow_forwardA student holds a vibrating tuning fork of frecquency 440 Hz above an ain column with one end open and one end closed, having length E, and producing resonance (meaning a standing wave is created) iit comesponds ito the first harmonic. A) What is the wavelength of the standing wave? Show all work! B) How many nodes and anti-nodes are there in thiis tirst barmonic C) For the same set up, if a tuning fork with twice the dtequency is used,williherg be a standing wave (al the next harmonic) in the air column? Justify your reasoning.arrow_forward
- This is a Ophysics lab, I have to find the fundamental frequency and wavelength, and the harmonic number of those recorded. Speed of air is 345 m/s. And then calculate the expected wavelingths. Even if you can't answer this question, can you give me formulas and points in the right direction. I am desperate at this point. Any help would be GREAT!arrow_forward(A) Suppose a source emits a sound of frequency 350 HZ when the source moves toward a fixed observer. What is the velocity of source when the frequency which observer hear it 396.6 HZ, and the velocity of the sound is 340 m/s? (B) 1. Explain the effected of temperature on the viscosity ? 2. Explain the mechanisms of tactile sensitivity? (C) At which depth of an ocean the pressure is be 9.3x10 Pa, when the density of water is 1x10³ kg/m³ and pA= 1.01x10³ Pa.arrow_forward(a) To appreciate the human ear’s twelve order of magnitude (1012) span from barely audible to the pain threshold, consider the following. Suppose an equivalently dynamic instrument were designed to measure distances. Taking the lower limit of the instrument to be 1.00 mm, what would be the largest distance measurable? (b) To provide a perspective for the human ear’s frequency sensitivity range (audible frequency extremes differ by 103 ), consider a speedometer with a similar speed range. If the speedometer’s maximum speed reading is 90.0 mi/h, what is the smallest finite speed that it could register?arrow_forward
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