27. On a day when there is no wind, a loudspeaker S is placed at each goalpost at one end of a football field. The loudspeakers are in phase and are emitting sounds of the same constant frequency and intensity. The boys in a class are asked to find positions on the field where the sound is faintest and the girls to find positions where the sound is loudest. The positions taken are shown in the diagram below. Q Q 0 Q ♂ Q d dddd ರ S S ㅇ 어둠 Boy Girl Which student is at a position which best satisfies the conditions X = 3^? L 2d X = the distance from the student to the right bisector of the line joining the loudspeakers L = the distance of the student from the midpoint between the sources speakers A = the wavelength of the sound from the speakers d = the distance between the speakers (a) 2 (b) 4 (c) 5 (d) 6 (e) 7
27. On a day when there is no wind, a loudspeaker S is placed at each goalpost at one end of a football field. The loudspeakers are in phase and are emitting sounds of the same constant frequency and intensity. The boys in a class are asked to find positions on the field where the sound is faintest and the girls to find positions where the sound is loudest. The positions taken are shown in the diagram below. Q Q 0 Q ♂ Q d dddd ರ S S ㅇ 어둠 Boy Girl Which student is at a position which best satisfies the conditions X = 3^? L 2d X = the distance from the student to the right bisector of the line joining the loudspeakers L = the distance of the student from the midpoint between the sources speakers A = the wavelength of the sound from the speakers d = the distance between the speakers (a) 2 (b) 4 (c) 5 (d) 6 (e) 7
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 55P: During a 4th of July celebration, an M80 firework explodes on the ground, producing a bright flash...
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Transcribed Image Text:27. On a day when there is no wind, a loudspeaker S is placed at each goalpost at one end of a
football field. The loudspeakers are in phase and are emitting sounds of the same constant
frequency and intensity. The boys in a class are asked to find positions on the field where the
sound is faintest and the girls to find positions where the sound is loudest. The positions taken are
shown in the diagram below.
Q
Q
0
Q
♂ Q
d dddd ರ
S
S
ㅇ 어둠
Boy
Girl
Which student is at a position which best satisfies the conditions X = 3^?
L 2d
X = the distance from the student to the right bisector of the line joining the
loudspeakers
L = the distance of the student from the midpoint between the sources speakers
A = the wavelength of the sound from the speakers
d = the distance between the speakers
(a) 2 (b) 4 (c) 5 (d) 6 (e) 7
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