Examples of Wave Calculations.
Q1. A sound
wave has a frequency of 3250
and a wavelength of 0·1 m. What is its velocity?
A1. Use v = f x l
= 3250 x 0·1
= 325 m/s.
Q2. A sound
wave travels with a velocity of
and has a frequency of 500 Hz. What is its wavelength?
A2. Use l = v ÷ f
l = 330
= 0·66 m.
Q3. A wave at sea travels
with a velocity of 25 m/s.
If it has a wavelength of 10 m, what is its frequency?
A3. Use f = v ÷ l
25 ÷ 10
= 2·5 Hz.
Note - always make sure that
you give the units for your
and that the units are correct.
If the wavelength is given in centimetres,
convert it to metres before doing the calculation.
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