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(Created page with "==Key Stage 3== ===Meaning=== Frequency is the number of waves that pass by in one second.")
 
 
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===Meaning===
 
===Meaning===
 
[[Frequency]] is the number of [[wave]]s that pass by in one [[second]].
 
[[Frequency]] is the number of [[wave]]s that pass by in one [[second]].
 +
 +
===About Frequency===
 +
: [[Frequency]] is [[measure]]d in [[Hertz]] (Hz).
 +
{| class="wikitable"
 +
|-
 +
| style="height:20px; width:200px; text-align:center;" |'''Water Waves'''
 +
|-
 +
|[[File:WaveFrequency.gif|center]]
 +
|-
 +
| style="height:20px; width:200px; text-align:center;" |The [[frequency]] of this [[wave]] can be found by counting the number of times the red marker [[oscillate]]s every [[second]].
 +
|}
 +
: The higher the [[frequency]] the quicker the [[wave]] [[Oscillation|oscillates]].
 +
: In [[sound]] [[frequency]] is known as [[pitch]]. A high [[pitch]] is a high [[frequency]].
 +
: In [[light]] [[frequency]] affects the [[colour]] of the [[light]]. Red is a low [[frequency]] and violet is a high [[frequency]].
 +
 +
===Equation===
 +
Frequency = 1/(Period)
 +
 +
<math>f = \frac{1}{T}</math>
 +
 +
Where:
 +
 +
f = [[Frequency]]
 +
 +
T = [[Period|time period]] (the [[time]] it takes for one [[wave]] to pass a point).
 +
 +
==Key Stage 4==
 +
===Meaning===
 +
[[Frequency]] is the number of [[wave]]s that pass a given point in one [[second]].
 +
 +
===About Frequency===
 +
: [[Frequency]] is a [[scalar]] quantity because it has [[magnitude]] but no direction.
 +
: The [[SI Unit]] of [[frequency]] is [[Hertz]] (Hz).
 +
 +
{| class="wikitable"
 +
|-
 +
| style="height:20px; width:200px; text-align:center;" |'''Water Waves'''
 +
|-
 +
|[[File:WaveFrequency.gif|center]]
 +
|-
 +
| style="height:20px; width:200px; text-align:center;" |The [[frequency]] of this [[wave]] can be found by counting the number of times the red marker [[oscillate]]s every [[second]].
 +
|}
 +
: The higher the [[frequency]] the quicker the [[wave]] [[Oscillation|oscillates]].
 +
: In [[sound]] [[frequency]] is known as [[pitch]]. A high [[pitch]] is a high [[frequency]].
 +
: In [[light]] [[frequency]] affects the [[colour]] of the [[light]]. Red is a low [[frequency]] and violet is a high [[frequency]].
 +
: When [[wave]] enters a new [[medium]] it will remain the same [[frequency]] but the [[Wave Speed|wave speed]] and [[wavelength]] will change.
 +
: [[Frequency]] can be found by counting the number of [[wave]]s which pass a point in a given [[time]] and dividing this by the [[time]].
 +
 +
===Equation===
 +
====Equation 1====
 +
''NB: You do not need to remember this equation but you should know how to find [[frequency]] given the [[time]] taken for one [[wave]] to pass a point.''
 +
 +
Frequency = 1/(Period)
 +
 +
<math>f = \frac{1}{T}</math>
 +
 +
Where:
 +
f = [[Frequency]]
 +
 +
T = [[Period|time period]] (the [[time]] it takes for a wave to pass a point).
 +
 +
====Equation 2====
 +
''NB: You do not need to remember this equation but you should know how to find [[frequency]] given the number of [[wave]]s passing a point and the [[time]] taken.''
 +
 +
Frequency = (Number of Waves which pass a point)/(Time taken for waves to pass a point)
 +
 +
<math>f = \frac{n}{t}</math>
 +
 +
Where:
 +
f = [[Frequency]]
 +
 +
n = Number of [[wave]]s which pass a point.
 +
 +
t = The [[time]] taken for those [[wave]]s to pass a point.
 +
 +
====Equation 3====
 +
''NB: You should remember this equation with v as the subject of the formula.''
 +
 +
Frequency = (Wave Speed)/(Wavelength)
 +
 +
<math> f = \frac{v}{\lambda}</math>
 +
 +
Where
 +
 +
<math> \lambda</math> = The [[wavelength]] of the [[wave]].
 +
 +
<math>v</math> = The [[Wave Speed|wave speed]] of the [[wave]].
 +
 +
<math>f</math> = The [[frequency]] of the [[wave]].
 +
 +
===Example Calculations===
 +
====Finding Frequency from Time Period====
 +
{| class="wikitable"
 +
| style="height:20px; width:300px; text-align:center;" |Calculate the [[frequency]] of a [[wave]] with a [[period]] of 0.04 seconds.
 +
| style="height:20px; width:300px; text-align:center;" |A giant pendulum takes 16 seconds to make one complete [[oscillation]]. Calculate the [[frequency]] of the pendulum.
 +
|-
 +
| style="height:20px; width:300px; text-align:left;" |'''1. State the known quantities'''
 +
 +
T = 0.04s
 +
| style="height:20px; width:300px; text-align:left;" |'''1. State the known quantities'''
 +
 +
T = 16s
 +
|-
 +
| style="height:20px; width:300px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
 +
 +
<math> f = \frac{1}{T}</math>
 +
 +
<math> f = \frac{1}{0.04}</math>
 +
 +
<math> f = 25Hz</math>
 +
| style="height:20px; width:300px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
 +
 +
<math> f = \frac{1}{T}</math>
 +
 +
<math> f = \frac{1}{16}</math>
 +
 +
<math> f = 0.0625Hz</math>
 +
|}
 +
 +
====Finding Frequency from the number of waves and time taken====
 +
{| class="wikitable"
 +
| style="height:20px; width:300px; text-align:center;" |A scientist wants to determine the [[frequency]] of a pendulum. They count that the pendulum [[oscillate]]s 15 times over 20 seconds. Calculate the [[frequency]] of the pendulum.
 +
| style="height:20px; width:300px; text-align:center;" |A sailor notices a buoy bounce up and down 24 times over a minute. Calculate the [[frequency]] of the [[wave]]s.
 +
|-
 +
| style="height:20px; width:300px; text-align:left;" |'''1. State the known quantities'''
 +
 +
n = 15
 +
 +
t = 20s
 +
| style="height:20px; width:300px; text-align:left;" |'''1. State the known quantities'''
 +
 +
n = 24
 +
 +
t = 60
 +
|-
 +
| style="height:20px; width:300px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
 +
 +
<math>f = \frac{n}{t}</math>
 +
 +
<math>f = \frac{15}{20}</math>
 +
 +
<math>f = 0.75Hz</math>
 +
 +
| style="height:20px; width:300px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
 +
 +
<math>f = \frac{n}{t}</math>
 +
 +
<math>f = \frac{24}{60}</math>
 +
 +
<math>f = 0.4Hz</math>
 +
|}
 +
 +
====Finding Frequency from Wavelength and Wave Speed====
 +
{| class="wikitable"
 +
| style="height:20px; width:300px; text-align:center;" |A [[microwave]] travelling at a speed of 3.0x10<sup>8</sup>m/s has a [[wavelength]] of 0.051m. Calculate the [[frequency]] of the [[wave]] correct to two [[Significant Figures|significant figures]].
 +
| style="height:20px; width:300px; text-align:center;" |An [[ultrasound]] [[wave]] of [[wavelength]] 0.125m passes through an [[Iron]] block at a [[speed]] of 5000m/s. Calculate the [[frequency]] of the [[wave]] correct to two [[Significant Figures|significant figures]].
 +
|-
 +
| style="height:20px; width:300px; text-align:left;" |'''1. State the known quantities'''
 +
 +
v = 3.0x10<sup>8</sup>m/s
 +
 +
λ = 0.051m
 +
| style="height:20px; width:300px; text-align:left;" |'''1. State the known quantities'''
 +
 +
v = 5000m/s
 +
 +
λ = 0.125m
 +
|-
 +
| style="height:20px; width:300px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
 +
 +
<math> f = \frac{v}{\lambda}</math>
 +
 +
<math> f = \frac{3.0 \times 10^8}{0.051}</math>
 +
 +
<math> f = 5882352941Hz</math>
 +
 +
<math> f \approx 5900000000Hz</math>
 +
 +
| style="height:20px; width:300px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
 +
 +
<math> f = \frac{v}{\lambda}</math>
 +
 +
<math> f = \frac{5000}{0.125}</math>
 +
 +
<math> f = 40000Hz</math>
 +
|}
 +
 +
===References===
 +
====AQA====
 +
 +
:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Frequency (f), pages 50-1, 583, GCSE Physics, Hodder, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac201 ''Frequency, page 73, GCSE Physics; The Revision Guide, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Frequency, pages 189, 190, GCSE Combined Science Trilogy; Physics, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Frequency, pages 190-3, 200-1, 206-9, 213-15, 218, 222, 224, 236-7, 275, GCSE Physics; Student Book, Collins, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Frequency, pages 226, 227, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Frequency, pages 257, GCSE Combined Science Trilogy 2, Hodder, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Frequency; human hearing range, page 280, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac202 ''Frequency; human hearing range, page 88, GCSE Physics; The Revision Guide, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Frequency; Measurement of, pages 260, GCSE Combined Science Trilogy 2, Hodder, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Frequency; of EM waves, pages 200, 203, GCSE Combined Science Trilogy; Physics, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Frequency; of EM waves, pages 242, 245, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac203 ''Frequency; of EM waves, pages 76, 81, GCSE Physics; The Revision Guide, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Frequency; of mains electricity, page 66, GCSE Physics; Student Book, Collins, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac204 ''Frequency; of mains supply, page 31, GCSE Physics; The Revision Guide, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Frequency; of mains supply, page 86, GCSE Combined Science Trilogy; Physics, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Frequency; of mains supply, page 89, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
 +
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Frequency; table, pages 40-1, GCSE Physics; Student Book, Collins, AQA '']
 +
 +
====Edexcel====
 +
 +
:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Frequency (waves), page 91, GCSE Physics, CGP, Edexcel '']
 +
:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Frequency (waves); of hearing, page 104, GCSE Physics, CGP, Edexcel '']
 +
:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Frequency (waves); of infrasound, page 109, GCSE Physics, CGP, Edexcel '']
 +
:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Frequency (waves); of ultrasound, page 106, GCSE Physics, CGP, Edexcel '']
 +
:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Frequency, pages 164-166, 168, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
 +
:[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Frequency, pages 32-34, 43, GCSE Physics; The Revision Guide, CGP, Edexcel '']
 +
:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Frequency, pages 331, 340, GCSE Combined Science, Pearson Edexcel '']
 +
:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Frequency, pages 49, 72, GCSE Physics, Pearson Edexcel '']
 +
 +
===References===
 +
:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Frequency, pages 137, 142, 149, , 153, 179, 256-157, Gateway GCSE Physics, Oxford, OCR '']
 +
:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Frequency, pages 186-188, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']
 +
:[https://www.amazon.co.uk/gp/product/1782945687/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945687&linkCode=as2&tag=nrjc-21&linkId=9a598e52189317a20311d7a632747bc9 ''Frequency, pages 59-61, 64, Gateway GCSE Physics; The Revision Guide, CGP, OCR  '']

Latest revision as of 09:19, 11 December 2019

Key Stage 3

Meaning

Frequency is the number of waves that pass by in one second.

About Frequency

Frequency is measured in Hertz (Hz).
Water Waves
WaveFrequency.gif
The frequency of this wave can be found by counting the number of times the red marker oscillates every second.
The higher the frequency the quicker the wave oscillates.
In sound frequency is known as pitch. A high pitch is a high frequency.
In light frequency affects the colour of the light. Red is a low frequency and violet is a high frequency.

Equation

Frequency = 1/(Period)

\(f = \frac{1}{T}\)

Where:

f = Frequency

T = time period (the time it takes for one wave to pass a point).

Key Stage 4

Meaning

Frequency is the number of waves that pass a given point in one second.

About Frequency

Frequency is a scalar quantity because it has magnitude but no direction.
The SI Unit of frequency is Hertz (Hz).
Water Waves
WaveFrequency.gif
The frequency of this wave can be found by counting the number of times the red marker oscillates every second.
The higher the frequency the quicker the wave oscillates.
In sound frequency is known as pitch. A high pitch is a high frequency.
In light frequency affects the colour of the light. Red is a low frequency and violet is a high frequency.
When wave enters a new medium it will remain the same frequency but the wave speed and wavelength will change.
Frequency can be found by counting the number of waves which pass a point in a given time and dividing this by the time.

Equation

Equation 1

NB: You do not need to remember this equation but you should know how to find frequency given the time taken for one wave to pass a point.

Frequency = 1/(Period)

\(f = \frac{1}{T}\)

Where: f = Frequency

T = time period (the time it takes for a wave to pass a point).

Equation 2

NB: You do not need to remember this equation but you should know how to find frequency given the number of waves passing a point and the time taken.

Frequency = (Number of Waves which pass a point)/(Time taken for waves to pass a point)

\(f = \frac{n}{t}\)

Where: f = Frequency

n = Number of waves which pass a point.

t = The time taken for those waves to pass a point.

Equation 3

NB: You should remember this equation with v as the subject of the formula.

Frequency = (Wave Speed)/(Wavelength)

\( f = \frac{v}{\lambda}\)

Where

\( \lambda\) = The wavelength of the wave.

\(v\) = The wave speed of the wave.

\(f\) = The frequency of the wave.

Example Calculations

Finding Frequency from Time Period

Calculate the frequency of a wave with a period of 0.04 seconds. A giant pendulum takes 16 seconds to make one complete oscillation. Calculate the frequency of the pendulum.
1. State the known quantities

T = 0.04s

1. State the known quantities

T = 16s

2. Substitute the numbers into the equation and solve.

\( f = \frac{1}{T}\)

\( f = \frac{1}{0.04}\)

\( f = 25Hz\)

2. Substitute the numbers into the equation and solve.

\( f = \frac{1}{T}\)

\( f = \frac{1}{16}\)

\( f = 0.0625Hz\)

Finding Frequency from the number of waves and time taken

A scientist wants to determine the frequency of a pendulum. They count that the pendulum oscillates 15 times over 20 seconds. Calculate the frequency of the pendulum. A sailor notices a buoy bounce up and down 24 times over a minute. Calculate the frequency of the waves.
1. State the known quantities

n = 15

t = 20s

1. State the known quantities

n = 24

t = 60

2. Substitute the numbers into the equation and solve.

\(f = \frac{n}{t}\)

\(f = \frac{15}{20}\)

\(f = 0.75Hz\)

2. Substitute the numbers into the equation and solve.

\(f = \frac{n}{t}\)

\(f = \frac{24}{60}\)

\(f = 0.4Hz\)

Finding Frequency from Wavelength and Wave Speed

A microwave travelling at a speed of 3.0x108m/s has a wavelength of 0.051m. Calculate the frequency of the wave correct to two significant figures. An ultrasound wave of wavelength 0.125m passes through an Iron block at a speed of 5000m/s. Calculate the frequency of the wave correct to two significant figures.
1. State the known quantities

v = 3.0x108m/s

λ = 0.051m

1. State the known quantities

v = 5000m/s

λ = 0.125m

2. Substitute the numbers into the equation and solve.

\( f = \frac{v}{\lambda}\)

\( f = \frac{3.0 \times 10^8}{0.051}\)

\( f = 5882352941Hz\)

\( f \approx 5900000000Hz\)

2. Substitute the numbers into the equation and solve.

\( f = \frac{v}{\lambda}\)

\( f = \frac{5000}{0.125}\)

\( f = 40000Hz\)

References

AQA

Frequency (f), pages 50-1, 583, GCSE Physics, Hodder, AQA
Frequency, page 73, GCSE Physics; The Revision Guide, CGP, AQA
Frequency, pages 189, 190, GCSE Combined Science Trilogy; Physics, CGP, AQA
Frequency, pages 190-3, 200-1, 206-9, 213-15, 218, 222, 224, 236-7, 275, GCSE Physics; Student Book, Collins, AQA
Frequency, pages 226, 227, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Frequency, pages 257, GCSE Combined Science Trilogy 2, Hodder, AQA
Frequency; human hearing range, page 280, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Frequency; human hearing range, page 88, GCSE Physics; The Revision Guide, CGP, AQA
Frequency; Measurement of, pages 260, GCSE Combined Science Trilogy 2, Hodder, AQA
Frequency; of EM waves, pages 200, 203, GCSE Combined Science Trilogy; Physics, CGP, AQA
Frequency; of EM waves, pages 242, 245, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Frequency; of EM waves, pages 76, 81, GCSE Physics; The Revision Guide, CGP, AQA
Frequency; of mains electricity, page 66, GCSE Physics; Student Book, Collins, AQA
Frequency; of mains supply, page 31, GCSE Physics; The Revision Guide, CGP, AQA
Frequency; of mains supply, page 86, GCSE Combined Science Trilogy; Physics, CGP, AQA
Frequency; of mains supply, page 89, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Frequency; table, pages 40-1, GCSE Physics; Student Book, Collins, AQA

Edexcel

Frequency (waves), page 91, GCSE Physics, CGP, Edexcel
Frequency (waves); of hearing, page 104, GCSE Physics, CGP, Edexcel
Frequency (waves); of infrasound, page 109, GCSE Physics, CGP, Edexcel
Frequency (waves); of ultrasound, page 106, GCSE Physics, CGP, Edexcel
Frequency, pages 164-166, 168, GCSE Combined Science; The Revision Guide, CGP, Edexcel
Frequency, pages 32-34, 43, GCSE Physics; The Revision Guide, CGP, Edexcel
Frequency, pages 331, 340, GCSE Combined Science, Pearson Edexcel
Frequency, pages 49, 72, GCSE Physics, Pearson Edexcel

References

Frequency, pages 137, 142, 149, , 153, 179, 256-157, Gateway GCSE Physics, Oxford, OCR
Frequency, pages 186-188, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR
Frequency, pages 59-61, 64, Gateway GCSE Physics; The Revision Guide, CGP, OCR
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