Test 4 Waves Testbank PastPapers

1

4

Sketch two cycles of the displacement-time (x-t) relationship for a simple pendulum. Assume that its
displacement is a maximum at time 0 seconds. Mark on the graph a time for which the velocity is maximum
(labeled A), a time for which the velocity is zero (labeled B) and a time fro which the acceleration is a
maximum (labeled C).

3

Calculate the phase difference between the two displacement-time graphs shown in the figure. Give
your answers in
a) seconds ...............................; b) radians ...............................; c) degrees ..............................................

Question 13-14, Waves on a string:
A travelling wave is created on a string. The graph below shows the variation with time t of the displacement y of a particular point on the string.
The variation with distance x of the displacement y of the string at t = 0 is shown below.

4

Use information from the graphs to calculate, for this wave,

(i) the wavelength;

(ii) the frequency;

(iii) the speed of the wave;

Questions 14-15 are about intensity and amplitude.
At a distance of 15m from the source, the intensity of a loud sound is 2.0 × 10^−4 𝑊 ∙ 𝑚−2.

2

Show that the intensity at 120 m from the source is approximately 3.0 × 10^−6 𝑊 ∙ 𝑚−2.

2

If the distance is kept constant, the amplitude is changed to make the intensity to 3.0 ×
10−6𝑊 ∙ 𝑚−2. Deduce how the amplitude of the wave changes.

Question 16-17 are about waves.
In the scale diagram below, plane wavefronts travel from medium 1 to medium 2 across the boundary AB.

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State and explain in which medium the wavefronts have the greater speed.

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Test 4 Waves Testbank PastPapers

Calculate the phase difference between the two displacement-time graphs shown in the figure. Give
your answers in
a) seconds ...............................; b) radians ...............................; c) degrees ..............................................

Use information from the graphs to calculate, for this wave,

(i) the wavelength;

(ii) the frequency;

(iii) the speed of the wave;

Show that the intensity at 120 m from the source is approximately 3.0 × 10^−6 𝑊 ∙ 𝑚−2.

If the distance is kept constant, the amplitude is changed to make the intensity to 3.0 ×
10−6𝑊 ∙ 𝑚−2. Deduce how the amplitude of the wave changes.

State and explain in which medium the wavefronts have the greater speed.

By taking measurements from the diagram, determine the ratio

Calculate the phase difference between the two displacement-time graphs shown in the figure. Give
your answers in
a) seconds ...............................; b) radians ...............................; c) degrees ..............................................

Use information from the graphs to calculate, for this wave,

(i) the wavelength;

(ii) the frequency;

(iii) the speed of the wave;

Show that the intensity at 120 m from the source is approximately 3.0 × 10^−6 𝑊 ∙ 𝑚−2.

If the distance is kept constant, the amplitude is changed to make the intensity to 3.0 ×
10−6𝑊 ∙ 𝑚−2. Deduce how the amplitude of the wave changes.

State and explain in which medium the wavefronts have the greater speed.

By taking measurements from the diagram, determine the ratio

Test 4 Waves Testbank PastPapers

Test 4 Waves Testbank PastPapers

Calculate the phase difference between the two displacement-time graphs shown in the figure. Giveyour answers ina) seconds ...............................; b) radians ...............................; c) degrees ..............................................

Use information from the graphs to calculate, for this wave,(i) the wavelength;(ii) the frequency;(iii) the speed of the wave;

Show that the intensity at 120 m from the source is approximately 3.0 × 10^−6 𝑊 ∙ 𝑚−2.

If the distance is kept constant, the amplitude is changed to make the intensity to 3.0 ×10−6𝑊 ∙ 𝑚−2. Deduce how the amplitude of the wave changes.

State and explain in which medium the wavefronts have the greater speed.

By taking measurements from the diagram, determine the ratio

Calculate the phase difference between the two displacement-time graphs shown in the figure. Giveyour answers ina) seconds ...............................; b) radians ...............................; c) degrees ..............................................

Use information from the graphs to calculate, for this wave,(i) the wavelength;(ii) the frequency;(iii) the speed of the wave;

Show that the intensity at 120 m from the source is approximately 3.0 × 10^−6 𝑊 ∙ 𝑚−2.

If the distance is kept constant, the amplitude is changed to make the intensity to 3.0 ×10−6𝑊 ∙ 𝑚−2. Deduce how the amplitude of the wave changes.

State and explain in which medium the wavefronts have the greater speed.

By taking measurements from the diagram, determine the ratio

Calculate the phase difference between the two displacement-time graphs shown in the figure. Give
your answers in
a) seconds ...............................; b) radians ...............................; c) degrees ..............................................

Use information from the graphs to calculate, for this wave,

(i) the wavelength;

(ii) the frequency;

(iii) the speed of the wave;

If the distance is kept constant, the amplitude is changed to make the intensity to 3.0 ×
10−6𝑊 ∙ 𝑚−2. Deduce how the amplitude of the wave changes.

Calculate the phase difference between the two displacement-time graphs shown in the figure. Give
your answers in
a) seconds ...............................; b) radians ...............................; c) degrees ..............................................

Use information from the graphs to calculate, for this wave,

(i) the wavelength;

(ii) the frequency;

(iii) the speed of the wave;

If the distance is kept constant, the amplitude is changed to make the intensity to 3.0 ×
10−6𝑊 ∙ 𝑚−2. Deduce how the amplitude of the wave changes.