COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Question
Chapter 13, Problem 31QAP
To determine
(a)
The distance of sound in air.
To determine
(b)
Explain
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Question 25
In an experiment, two students measured the speed of sound in sea water at room
temperature (20°C). Both of the students recorded their results in their notebooks as
follows:
A) (1515 + 7)m/s
B) (1522 + 4) m/s
The students then looked up the value for the speed of sound in sea water and found
it to be 1531 m/s. Which of the following statements best describes the comparison
between the students' results and the accepted value for the speed?
The values that the two students found did not agree with each other, but one of
the student's answer did agree with the accepted value.
The values that the two students found agree with each other but not with the
accepted value.
The values that the two students found did not agree with each other, nor with
the accepted value.
The values that the two students found agree with each other and with the
accepted value.
The values that the two students found were wrong and should have agreed with
the accepted value.
= 424 m away. How long (in s) until the dolphin hears an echo? Assume the water temperature is 25°C, and
While floating in the ocean, a dolphin emits a sound wave directed toward the hull of an ocean liner d
the speed of sound in the water is 1,533 m/s.
S
Question 2
If the speed of sound in air at 0 °C is 331 m/s. What will be the speed of sound in air at 50 °C?
299 m/s
142 m/s
331 m/s
360 m/s
None of these.
A Moving to another question will
ave this response.
ch
45
Chapter 13 Solutions
COLLEGE PHYSICS
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- Item 9 Learning Goal: To learn the properties of logarithms and how to manipulate them when solving sound problems. The intensity of sound is the power of the sound waves divided by the area on which they are incident. Intensity is measured in watts per square meter, or W/m². The human ear can detect a remarkable range of sound intensities. The quietest sound that we can hear has an intensity of 10-¹2 W/m², and we begin to feel pain when the intensity reaches 1 W/m². Since the intensities that matter to people in everyday life cover a range of 12 orders of magnitude, intensities are usually converted to a logarithmic scale called the sound intensity level 3, which is measured in decibels (dB). For a given sound intensity I, B is found from the equation ß = (10 dB) log (1). where Io = 1.0 × 10-¹2 W/m². Part A What is the value of log(1,000,000)? Express your answer as an integer. ► View Available Hint(s) The logarithm of x, written log(x), tells you the power to which you would raise 10…arrow_forwardThe motion of a particle is described by y = (0.05 m) sin(20 rad t), where y is in meters and tis in seconds. What is the frequency of the motion of the particle? O 3 Hz O 2 Hz O 1 Hz O 4 Hzarrow_forwardYou place your ear onto a steel railroad track and hear the sound of a distant train through the rails Δt = 3.6 seconds faster than you do through the air. The speed of sound in steel is vs = 6100 m/s while in air the speed of sound is va = 343 m/s. (a) Write an equation for the time it takes the sound to reach you through the air if the distance to the train is represented by D. (b) Write an equation for the time it takes the sound to reach you through the steel if the distance to the train is represented by D. (c) Use the difference in these two times to write an equation for the distance to the train. (d) For the given information find the distance to the train in meters.arrow_forward
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