Sound Waves
2 marks · EasyA sound wave is displayed on an oscilloscope screen. The time for one complete wave (time period) on the screen is 0.01 s. Calculate the frequency of the sound wave. State the correct unit.
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100 Hz (±2)
Also accept: 100 Hertz
Common mistakes: 0.01; 10 Hz; incorrect formula
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Marking points
M1 · 1 mark · Uses f = 1 / T.
A1 · 1 mark · Correct answer: 100 Hz.
Worked solution
f = 1 / 0.01 = 100 Hz