If you place a candle directly in front of a large speaker that is playing music, what do your expect will happen to the candle flame? O The flame will not be effected by the speaker. O The flame will be pushed in and out in an oscillating manner., OThe flame will only be pushed out away from the spo The flame will only be pulled in toward

If you place a candle directly in front of a large speaker that is playing music, what do your expect will happen to the candle flame? O The flame will not be effected by the speaker. O The flame will be pushed in and out in an oscillating manner., OThe flame will only be pushed out away from the spo The flame will only be pulled in toward

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter17: Sound

Section: Chapter Questions

Problem 129AP: A 0.80-m-long tube is opened at both ends. The air temperature is 26°C. The air in the tube is...

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Six members at a synchronized swim team weal earplugs to protect themselves against water pressure at depths, but they can still hear the music and perform the combinations in the water perfectly. One day, they were asked to leave the pool so the dive team could practice a few dives, and they tried to practice on a mat, but seemed to have a lot more difficulty. Why might this be?
You are driving toward the base of a cliff and you honk your horn. (a) Is there a Doppler shift of the sound when you hear the echo? If so, is it like a moving source or moving observer? (b) What if the reflection occurs not from a cliff, but from the forward edge of a huge alien spacecraft moving toward you as you drive?
A hammer strikes one end of a thick iron rail of length 8.50 m. A microphone located at the opposite end of the rail delects two pulses of sound, one that travels through the air and a longitudinal wave that travels through the rail, (a) Which pulse reaches the microphone first? (b) Find the separation in time between the arrivals of the two pulses.
A cowboy stands on horizontal ground between two parallel, vertical clifTs. He is not midway between the cliffs. Me fires a shot and hears its echoes. The second echo arrives 1.92 s after the first and 1.47 s before the third. Consider only the sound traveling parallel to the ground and reflecting from the cliffs, (a) What is the distance between the cliffs? (b) What If? If he can hear a fourth echo, how long after the third echo does it arrive?
Waves on a swimming pool propagate at 0.750m/s. You splash the water at one end of the pool and observe the wave go to the opposite end, reflect, and return in 30.0 s. How far away is the other end of the pool?
A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound, and finds it to be 0.400 s. (a) How far away is the explosion if air temperature is 24.0°C and if you neglect the time taken for light to reach the physicist? (b) Calculate the distance to the explosion taking the speed of light into account. Note that this distance is negligibly greater.
When two waves interfere constructively or destructively, is there any gain or loss in energy in the system of the waves? Explain.
A 0.80-m-long tube is opened at both ends. The air temperature is 26°C. The air in the tube is oscillated using a speaker attached to a signal generator. What are the wavelengths and frequencies of first two modes of sound waves that resonate in the tube?
You are driving toward a cliff and honk your horn. Is there a Doppler shift of the sound when you hear the echo? If so. is it like a moving source or a moving observer? What if the reflection occurs not from a cliff, but from the forward edge of a huge alien spacecraft turning toward you as you drive?
A trough with dimensions 10.00 meters by 0.10 meters by 0.10 meters is partially filled with water. Smallamplitude surface water waves are produced from both ends of the trough by paddles oscillating in simple harmonic motion. The height of the water waves are modeled with two sinusoidal wave equations, y1(x,t)=0.3msin(4m1x3s1t) and y2(x,t)=0.3mcos(4m1x+3s1t2) . What is the wave function of the resulting wave after the waves reach one another and before they reach the end of the trough (i.e., assume that there are only two waves in the trough and ignore reflections)? Use a spreadsheet to check your results. (Hint: Use the trig identities sin(uv)=sinucosvcosusinv and sin(uv)=sinucosvcosusinv
. The frequency of middle C on the piano is 261.6 Hz. (a) What is the wavelength of sound with this frequency as it travels in air at room temperature? (b) What is the wavelength of sound with this frequency in water?
Ultrasonic sound waves are often used in methods of nondestructive testing. For example, this method can be used to find structural faults in a steel I-beams used in building. Consider a 10.00 meter long, steel I-beam with a cross-section shown below. The weight of the I-beam is 3846.50 N. What would be the speed of sound through in the I-beam? (Ysteel=200GPa,steel=159GPa) .