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This document contains item number 6 in Mastering physics Ch 21 HW.
This is document contains the item number 5 in Mastering Physics CH 21 HW.
Ch. 15 HW Key
Oxford IGCSE CD
HW 6 Ch 20 - Traveling Waves Due: 11:59pm on Tuesday, October 20, 2015 To understand how points are awarded, read the Grading Policy for Policy for this assignment.
Enhanced EOC: Problem 20.52 A wave on a string is described by , where You may want to review (
is in
and
is in .
pages 566 - 572 572)) .
For help with math skills, you may want to review: Substituting Numbers into Mathematical Expressions For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Earthquake waves. waves .
Part A In what direction is this wave traveling? ANSWER: in the positive x -direction -direction in the negative x -direction -direction in other direction
Correct
Part B What is the wave speed? Express your answer to two significant figures and include the appropriate units. ANSWER: = 9.2
Correct
Part C What is the frequency? Express your answer to two significant figures and include the appropriate units.
ANSWER: = 3.8
Correct
Part D What is the wave number? Express your answer to two significant figures and include the appropriate units. ANSWER: = 2.6
Correct
Part E At
, wha whatt is the displacement of the string at
?
Express your answer to two significant figures and include the appropriate units. ANSWER: = -1.0
Correct
Problem 20.62 A sinusoidal wave travels t ravels along a stretched string. A par particl ticle e on the string has a maximum velocity of 1.10 maximum acceleration of 250 .
Part A What is the frequency of the wave? Express your answer with the appropriate units. ANSWER: 36.2
and a
Correct
Part B What is the amplitude of the wave? Express your answer with the appropriate units. ANSWER: 0.484
Correct
Problem 20.61 A string that is unde underr 49.0 of tension has linear density 4.80 wavelength 1.50 travels along the st string. ring.
. A sinusoidal wave with amplitude 3.50
Part A What is the maximum velocity of a particle on the string? Express your answer with the appropriate units. ANSWER: 14.8
Correct
Problem 20.57 The figure shows a snapshot graph of a wave traveling to the right along a string at .
Part A
and
At this instant, wha whatt is the velocity of point 1 on the t he string? s tring? Express your answer to three significant figures and include the appropriate units. ANSWER: -18.9
Correct
Part B What is the velocity of point 2 on the string at the same instant? Express your answer as an integer and include the appropriate units. ANSWER: 0
Correct
Part C What is the velocity of point 3 on the string at the same instant? Express your answer to three significant figures and include the appropriate units. ANSWER: 18.9
Correct
Problem 20.52 A wave on a string is described by , where
Part A In what direction is this wave traveling? ANSWER:
is in
and
is in .
in the positive x -direction -direction in the negative x -direction -direction in other direction
Correct
Part B What is the wave speed? Express your answer to two significant figures and include the appropriate units. ANSWER: = 14
Correct
Part C What is the frequency? Express your answer to two significant figures and include the appropriate units. ANSWER: = 3.8
Correct
Part D What is the wave number? Express your answer to two significant figures and include the appropriate units. ANSWER: = 1.7
Correct
Part E
At
, wha whatt is the displacement of the string at
?
Express your answer to two significant figures and include the appropriate units. ANSWER: = 2.3
All attempts used; correct answer withheld by instructor
Conceptual Question 20.9 The figure shows the wave fronts of a circular wave.
Part A What is the phase diff difference erence between points Express your answer in terms terms of constant
and
?
and
?
.
ANSWER: = 0
Correct
Part B What is the phase diff difference erence between points Express your answer in terms terms of constant ANSWER:
.
= 12 12.6 .6
Correct
Part C What is the phase diff difference erence between points Express your answer in terms terms of constant ANSWER: = 3. 3.14 14
Correct Score Summary: Your score on this assignment is 96.7%. You received 5.8 out of a possible total of 6 points.
