A pipe closed at one end is 1 0m long The air i... - WAEC Physics 1992 Question
A pipe closed at one end is 1.0m long. The air in the pipe is set into vibration and a fundamental note of frequency 85Hz is produced. Calculate the velocity of sound in the air. (Neglect end correction).
A
340.0ms-1
B
33Oms-1
C
170ms-1
D
85.0ms-1
correct option: a
L = λ/4; λ= 4 = 4m
v = fλ = 85 x 4 = 340ms-1
v = fλ = 85 x 4 = 340ms-1
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