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Section A

[ 28 marks]

Answer all question

Jawab semuasoalan

1. A student carries out an experiment to investigate the relationship between thelength , lof a piece of wire X placed at the cut A of cardboard strip and the angle

, .

The apparatus set-up for this experiment is shown in Diagram 1.1 and 1.2.

Seorang murid menjalankan satu eksperimen untuk mengkaji hubungan antara panjang,

lseutas wayar X yang diletakkan pada sekeping potongan kadbod di A dengan sudut,.

Susunan alat radas bagi eksperimen ini ditunjukkan pada rajah 1.1 dan 1.2.

The student starts the experiment with the length, lof a piece of wire X that is50.0 cm. The corresponding reading of protractor is shown in Diagram 1.3 on

page 3.

The experiment is repeated with length, lof wire 40.0 cm, 30.0 cm, 20.0 cm and10.0 cm. The corresponding readings of protractor are shown in Diagram 1.4, 1.5,

1.6 and 1.7 on pages 3, 4 and 5.

Murid itu memulakan eksperimen dengan panjang, lseurat wayar X 50.0 cm. Bacaan

jangkasudut yang sepadan yang sepadan ditunjukkan pada rajah 1.3 dihalaman 3.

Eksperimen diulangi dengan mengunakan panjang,l= 40.0 cm, 30.0 cm, 20.0 cm dan

10.0 cm. Bacaan jangkasudut yang sepadan dihalaman 3, 4 dan 5.

Diagram 1.1 Diagram 1.2

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Diagram 1.3

Diagram 1.4

l= 50.0 cm

= _____

l= 40.0 cm

= _____

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Diagram 1.5

Diagram 1.6

l= 30.0 cm

= _____

l= 20.0 cm

= _____

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Diagram 1.7

l= 10.0 cm

= _____

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For the experiment describe on page 2, identifyBagi eksperimen yang diterangkan di halaman 2, kenalpasti

(i) the manipulated variablePembolehubah dimanipulasi

.

[ 1

mark]

(ii) the responding variablePembolehubah bergerak balas

[ 1

mark]

(iii) the constant variablePembolehubah yang dimalarkan

.

[ 1

mark]

(b)For this part of question, write your answers in the spaces provided in thecorresponding diagrams.Untuk bahagian soalan ini, tulis jawapan anda diruang yang disediakan dalamrajah-rajah yang sepadan.

Based on Diagram 1.3, 1.4, 1.5, 1.6 and 1.7 on pages 3, 4 and 5.Berdasarkan rajah 1.3, 1.4, 1.5, 1.6 dan 1.7 di halaman 3, 4 dan 5.

(i) Record the reading of protractor in the space provided on pages 3, 4 and 5.Catat bacaan bagi jangka sudut diruangan yang telah disediakan pada

mukasurat 3, 4 dan 5.

[2 marks]

(ii) Tabulate your results for all values of land in the space given below.Jadualkan keputusan anda bagi semua nilai ldan dalam ruang di bawah.

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[ 4

marks]

(c)On the graph paper on page 8, plot a graph of against l.Pada kertas graf di halaman 8, lukis graf melawanl.

[ 5marks]

(d)Based on your graph in 1 (c), state the relationship between and l.Berdasarkan graf di 1 (c), nyatakan hubungan diantara dan l.

[1 mark]

(e)State oneprecaution that should be taken to improve the result of thisexperiment.Nyatakan satu langkah berjaga-jaga yang perlu diambil untuk memperbaiki

keputusan eksperimen ini.

[1 mark]

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100

120

80

60

40

20

0

P / kPa

40 80 120

T /oC

Graph of P against T

-40-80-120-160-200-240-280-320

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2. A student carries out an experiment to investigate the relationship between the gaspressure, P, and the temperature, T, of a fixed mass of gas at constant volume. Theresults of the experiment is shown in the graph of P against T as in Diagram 2.1 on

page 14.

a) Based on the graph in Diagram 2.1, determine the value of P when T = 60 o C.Show on the graph, how you determine the value of P. [2 marks ]

b) The pressure law states that the lowest temperature could be determined if thegraph is extrapolated.Based on the statement above, determine the lowest temperature.Show on the graph how you determine the lowest temperature. [2 marks ]

c) Based on the graph, state how gas pressure varies with temperature..

[1mark

]d) The gas pressure could be determine by using the formula P = mT, where m is the

gradient of the graph . Calculate the gradient, m. Show on the graph how you

determine m.

m = [3 marks ]

e) Calculate the value of P when the temperature is 227 oC.

P = [3 marks ]

f) State oneprecaution that should be taken to improve the results of thisexperiment.

.

.[1 mark ]

2(b)

2(a)

2(c)

2(d)

2(f)

For

examniner

2(e)