2726 words - 11 pages

*28GPH2201*

*28GPH2201*

Centre Number

Candidate Number

*GPH22*

*GPH22*

General Certificate of Secondary Education

2013

Science: Physics

Unit P2

Higher Tier

[GPH22]

MONDAY 24 JUNE, MORNING

TIME

1 hour 45 minutes.

INSTRUCTIONS TO CANDIDATES

Write your Centre Number and Candidate Number in the spaces provided at

the top of this page.

You must answer the questions in the spaces provided. Do not write

outside the box, around each page or on blank pages.

Complete in blue or black ink only. Do not write with a gel pen.

Answer all questions.

INFORMATION FOR CANDIDATES

The total mark for this paper is 115.

Figures in brackets printed down the right-hand side of pages indicate the

marks awarded to each question or part question.

Quality of written communication will be assessed in question 4(a).

8007.05R

*28GPH2202*

*28GPH2202*

8007.05R

1 (a) In 60 seconds 15 sea waves pass the end of a pier.

(i) Calculate the frequency of the waves.

You are advised to show clearly how you get your answer.

Remember to provide the unit with your answer.

Frequency � [2]

(ii) The wavelength of the sea waves is 8 m.

Calculate the speed of the waves.

You are advised to show clearly how you get your answer.

Speed � m/s [2]

Examiner Only

Marks Remark

*28GPH2203*

*28GPH2203*

8007.05R

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Examiner Only

Marks Remark

(b) Below is a diagram showing three wave fronts moving towards a solid

barrier.

solid barrier

(i) Complete the diagram to show the reflection of the wave fronts at

the barrier.

In your answer you should draw:

● a dotted line with an arrow on it to show the direction of the

reflected wave fronts,

● 3 reflected wave fronts. [4]

(ii) Mark on the diagram the wavelength of the incident waves. [1]

(iii) In what way, if at all, do the frequency, wavelength and speed

of water waves change when they are reflected? Indicate your

answer by placing a tick (✓) in the appropriate boxes.

Increases Decreases Unchanged

Frequency

Speed

Wavelength

[3]

*28GPH2204*

*28GPH2204*

8007.05R

Examiner Only

Marks Remark

(c) To study the reflection of sound from a solid object the apparatus

below was used.

electronic timer

0.0 ms

object

sound pulse

emitter and receiver

d

A

A pulse of sound was emitted by the device at A and the time taken

for the sound pulse to travel to the object and back again (round trip

time) was measured.

This was repeated for different distances d.

The results of the investigation are shown in the table below.

Distance

d in m

Time for the

round trip in ms

Time to travel

the distance d in ms

0.2 1.2

0.4 2.6

0.6 3.4

0.8 4.8

1.0 6.0

(i) Complete the table above by calculating the time for the pulse of

sound to travel the distance d. [1]

(ii) Using the equation below and data from the table calculate the

speed of sound.

Speed � Distance

Time

(1 ms � 1 millisecond � 0.001 s)

Speed of sound � m/s [3]

*28GPH2205*

*28GPH2205*

8007.05R

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Examiner Only

Marks Remark

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(iii) Using the grid below plot a graph of distanc...

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