waec model questions vol1 2019 physics
Objective • Question 10
Question 10
WAEC_MODEL_QUESTIONS_VOL1
•
2019
A string 0.50 m long is fixed at both ends. It is under a tension of 80 N and has a linear mass density of 0.010 kg m⁻¹. What is the frequency of the third harmonic of the standing wave on the string? Give your answer in hertz, rounded to the nearest whole number.
Answer Options
A.
357
Correct Answer
B.
268
C.
179
D.
537
Correct Answer
B
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