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AQA GCSE · Question 04.6 · Waves
A sound wave has a frequency of 750 Hz.
<br>
speed of sound in air = 330 m/s
<br><br>
Calculate the wavelength of the sound wave.
<br>
Use the equation:
<br>
wavelength = wave speed / frequency
A sound wave has a frequency of 750 Hz.
<br>
speed of sound in air = 330 m/s
<br><br>
Calculate the wavelength of the sound wave.
<br>
Use the equation:
<br>
wavelength = wave speed / frequency
How to approach this question
1. Identify the values for wave speed and frequency from the question.
2. Substitute these values into the given equation.
3. Calculate the result and include the correct units for wavelength.
Full Answer
wavelength = 330 / 750
wavelength = 0.44 m
The question provides the equation: wavelength = wave speed / frequency.
The values are given as:
wave speed = 330 m/s
frequency = 750 Hz
Substitute the values into the equation:
Wavelength = 330 / 750
Wavelength = 0.44 m
The unit for wavelength is metres (m).
Common mistakes
✗ Dividing frequency by wave speed instead of the other way around.\n✗ Forgetting the units (m) for wavelength.\n✗ Calculation error.
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