Question 1
A violin with string length 32 cm and string density
resonates in its fundamental with the first overtone of a 2.0-m organ pipe with one end closed and one end open. What is the tension in the string if the speed of sound in air is 344 m/s?
◦ 56 N
◦ 1000 N
◦ 110 N
◦ 450 N
◦ 4100 N
Question 2
Two stereo speakers mounted 4.52 m apart on a wall emit identical sound waves. You are standing at the opposite wall of the room at a point directly between the two speakers. You walk 2.11 m parallel to the wall, to a location where you first notice that the sound intensity is essentially zero. If the wall along which you are walking is
from the wall with the speakers, what is the wavelength of the sound waves? The walls are cushioned to absorb sound reflections.
◦ 2.05 m
◦ 1.71 m
◦ 2.91 m
◦ 2.57 m
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Sound intensity log question