A student investigator is measuring the speed of sound by looking at the time for a brief, sinusoidal pulse from a loudspeaker to travel down a tube, reflect from the closed end, and reach a microphone. The apparatus is as shown; typical data recorded by the microphone are graphed as shown. The first pulse is the sound directly from the loudspeaker; the second pulse is the reflection from the closed end. A portion of the returning wave reflects from the open end of the tube and makes another round trip before being detected by the microphone; this is the third pulse seen in the data.
What was the approximate length of the tube?
A. 0.35 m
B. 0.70 m
C. 1.4 m
D. 2.8 m
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
