The wave equation
3 marks · NormalA sound wave has a time period of 0.005 s.
(a)[1 mark]
State the relationship between frequency and time period.
(b)[2 marks]
Calculate the frequency of the sound wave.
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(a) frequency = 1 ÷ time period
(b) 200 Hz
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Correctly states f = 1 ÷ T.
M1 (b) · 1 mark · Substitutes T = 0.005 s into the formula.
A1 (b) · 1 mark · Correctly evaluates f = 200 Hz.
Worked solution
a) frequency = 1 ÷ time period
b) f = 1 ÷ 0.005 = 200 Hz