Section ABahagian A[28 marks]

[28 markah]Answer all questions from this section.

Jawab semua soalan daripada bahagian ini.1 An experiment is carried out to investigate the relationship between the pressure, P,

and the temperature, θ, for a fixed mass of air as shown in Diagram 1.1Suatu eksperimen dijalankan mengkaji hubungan antara tekanan, P, dengan suhu, θ, bagisatu jisim udara tertentu seperti yang ditunjukkan pada Rajah 1.1

The mixture of water and ice in the beaker are stirred continuously so that the temperature of the water is maintained at 0º C. The corresponding pressure of the air is recorded by measuring the difference in the mercury levels in the U-tube using a metre rule and is marked as h1 as shown in Diagram 1.2Suhu air dalam bikar dikekalkan pada 0º C dengan sentiasa mengacau campuran air dan air batu di dalamnya. Tekanan udara yang sepadan dicatatkan dengan mengukur perbezaan paras merkuri dalam tiub-U dengan menggunakan sebatang pembaris dan ditandakan sebagai h1 seperti yang ditunjukkan dalam Rajah 1.2

(a) Based on the description of the experiment, identify;Bagi eksperimen yang diterangkan, kenal pasti;(i) the manipulated variable

pemboleh ubah dimanipulasikan

……………………………………………………………………………….. [ 1 mark ]

(ii) the responding variable

pemboleh ubah bergerak balas

……………………………………………………………………………….. [ 1 mark ]

(iii)the constant variablepemboleh ubah dimalarkan

……………………………………………………………………………….. [ 1 mark ]

(b) In Diagram 1.3, 1.4, 1.5, 1.6 and 1.7, mark the corresponding differences in the mercury level, from h2 to h6 when the temperatures, θ = 20º, 40 ºC, 60 ºC, 80 ºC, and 100 ºC.Pada Rajah 1.3, 1.4, 1.5, 1.6 dan 1.7, tandakan perbezaan paras merkuri dari h2 hingga h6 apabila suhu, θ = 20ºC, 40 ºC, 60 ºC, 80 ºC, dan 100 ºC. [3 markah]

(c) Based on the marks you have made, measure the value of the difference in mercury level, h , and tabulate your results for θ/ºC , T/K and h/cm in the space on page 5. Berdasarkan tanda-tanda yang telah anda buat, ukur nilai perbezaan paras merkuri, h dan jadualkan keputusan untuk θ/ºC , T/K dan h/cm dalam ruangan pada muka kelima.

[4 markah]

(d) On the graph paper, plot a graph of h against T. [ 5 marks ]Plotkan graf h melawan T pada kertas graf. [5 markah]

(e) From the graph, state the relationship between h and TDari graf, nyatakan perhubungan di antara h dan T.

……………………………………………………………………………………. [ 1 mark ]

2 A student hangs a simple pendulum from the ceiling of the laboratory and measure the period, T of oscillation of the simple pendulum when the bob of the pendulum is at different height, h from the floor.Seorang pelajar menggantung bandul dari atas syiling makmal untuk mengira tempoh, T bagi ayunan bandul ringkas tersebut pada ketinggian, h yang berbeza dari lantai.

(a) (i) Describe how you would measure the period T of the simple pendulumHuraikan bagaimana anda akan mengira tempoh, T bagi bandul ringkas tersebut.

…………………………………………………………………………………

………………………………………………………………………………… [2 marks]

(ii) State one precaution during the measurement of the period TNyatakan satu langkah berjaga-jaga semasa mengukur tempoh T.

………………………………………………………………………………… [ 1 mark ]

(b) The results of the experiment are shown in the graph of T2 against h in Figure 2.1Keputusan eksperimen ditunjukkan dalam graf T2 melawan h dalam Rajah 2.1

(i) State the relationship between T2 and hNyatakan hubungan diantara T2 dan h

………………………………………………………………………………… [1 mark]

(ii) The gradient of the graph of T2 against h is related to the acceleration due to gravity g by the equation

Gradient = −4 π2

g

Determine the gradient of the graph, and then calculate the value of g.Kecerunan graf T2 melawan h dihubungkan dengan pecutan graviti oleh persamaan

Kecerunan = −4 π2

gTentukan kecerunan graf dan seterusnya kirakan nilai g

[ 5 marks ]

(iii) Read from the graph the value of T2 when h = 0Dari graf, carikan nilai T2 bila h = 0 [ 1mark ]

(iv) The height of the laboratory ceiling H is given by the equation

H = T 2

3.99 where T 2 is obtained from 2(b)(iii)

Calculate H, the height of the ceilingKetinggian syiling makmal tersebut,H diberikan oleh persamaan

H = T 2

3.99 di mana T 2 didapati dari 2(b)(iii)

Kirakan H, ketinggian syiling tersebut.

[ 2 marks ]

Section BBahagian B[28 marks]

[28 markah]Answer one question from this section.

Jawab satu soalan daripada bahagian ini.3

The diagram above shows a boy and her mother each sit on similar swings. If they are given a push, it is found that the mother will be more difficult to be moved.Rajah di atas menunujukkan seorang budak perempuan dan ibunya duduk di atas buaian yang sama. Apabila mereka ditolak, didapati bahawa buaian dengan ibu di atas lebihsukar digerakkan.

Based on the above information and observation,Berdasarkan makulmat dan pemerhatian di atas,

(a) make one suitable inference. [1 mark]buat satu inferens yang sesuai.

(b) state one appropriate hypothesis that could be investigated. [1 mark]nyatakan satu hipotesis yang sesuai dan boleh disiasat. with the use of apparatus such as hacksaw blade, plasticine and other apparatus, describe an experimental framework to test your hypothesis.terangkan satu rangka kerja eksperimen untuk menguji hipotesis anda menggunakan bilah gergaji keluli, plastisin dan lain-lain radas.

In your description, state clearly the following:Dalam penerangan anda jelaskan perkara berikut:(i) aim of the experiment

tujuan eksperimen(ii) variables in the experiment

pemboleh ubah yang terlibat dalam eksperimen itu(iii)list of apparatus and materials

senarai radas dan bahan(iv)arrangement of the apparatus

sususan radas(v) the procedure of the experiment, which includes the method of controlling the

manipulated variable and the method of measuring the responding variableprosedur eksperimen termasuk kaedah mengawal pemboleh ubah dimanipulasi dan kaedah mengukur pemboleh ubah bergerak balas

(vi)the way you would tabulate the datacara bagaimana anda akan menjadualkan data

(v) the way you would analyse the data.cara bagaimana anda akan menganalisis data [10 marks]

4

Figure 4 shows same amount of heat is supplied to two metal pots (a) and (b) which have different volume of water, 1000 cm³ and 2000 cm³ water respectively. After five minutes, water in metal pot (a) started to boil but water in metal pot (b) is still not boiling.Rajah 4 menunjukkan kuantiti haba yang sama dibekalkan kepada dua periuk logam iaitu periuk logam (a) dan periuk logam (b) yang mempunyai isipadu air yang 1000 cm³ dan 2000 cm³ masing-masing. Selepas lima minit, didapati air di dalam periuk logam (a) mula mendidih tetapi air di dalam periuk logam (b) masih belum mendidih.

(a) State one suitable inference.Nyatakan satu inferens yang sesuai [1mark]

(b) State one appropriate hypothesis that could be investigated.Nyatakan satu hipotesis yang boleh disiasat. [1mark]

(c) With the use of apparatus such a beaker, an immersion heater, thermometer and other apparatus, describe one experiment to investigate the hypothesis stated in 4(b).Dengan menggunakan radas seperti bikar, pemanas rendam, termometer dan lain lain radas, terangkan satu eksperimen untuk menyiasat hipotesis yang dinyatakan di 4(b)

In your description, state clearly the following:Dalam penerangan anda jelaskan perkara berikut:

(i) The aim of the experimentTujuan eksperimen

(ii) Variables in the experimentPembolehubah dalam eksperimen

(iii)The list of apparatus and materials

Senarai radas dan bahan(iv)Arrangement of the apparatus

Sususan radas(v) The procedure of the experiment which includes one method of controlling the

manipulated variable and one method of measuring the responding variable.Prosedur eksperimen yang mesti termasuk satu kaedah mengawal pemboleh ubah dimanipulasikan dan satu kaedah mengukur pembolehubah bergerak balas

(vi)The way to tabulate the dataCara untuk menjadualkan data

(vii)The way to analyse the data.Cara untuk menganalisis data [10 marks]

SKEMAQUESTION 1 Marks(a) (i) Temperature

(ii) The pressure of the air p/h(iii) mass of the air

111

(b) teachers check the marks on the manometer by students 2(c) 5

(d) Uniform scale - 1 , correct label - 1, correct unit- 1, best straight line - 1,5 points plot correctly - 1

5

(e) T increases linearly with h 1

QUESTION 2(a) (i) Measure t20 for 20 oscillations. Period , T = t20 / 20

(ii) Oscillation in one vertical plane or amplitude of oscillation must be less than 15º.11

(b) (i) T2 decreases linearly with h(ii) Gradient = - 1.60 / 0.40 = - 4.0 s 2 m-1

g = −4 π 2

gradient

g =−4 π2

−4.4=9.87 ms−2

(iii) From the graph, when h = 0, T2 = 12.8 s2

(iv) Height, H =12.83.99

=3.21 m

11

11111

QUESTION 3(a) The time taken for body to start move depends on its mass // The inertia of the

body depends on its mass //The period of oscillation depens on its mass(b) The greater the mass, the longer time taken for body to start move //

The greater the mass, the longer the period ofmoscillation/inertiaThe larger the mass, the bigger the inertia

(c) (i) Stating the aim of the experimentTo study the relationship between the mass and period o oscillation / time taken for 1 complete oscillation/inertia

(ii) Manipulated variable : The mass of plasticine, m Responding variable : The period of oscillation, T/ inertia Fixed variable : The length of the hacksaw blade / the number of oscillation /

angle of displacement of hacksaw blade / stiffness of hacksaw blade

(iii) Hacksaw blade, stopwatch, plasticine/slotted weight, Gclamp, balance

(iv)

(v) Stating the procedure of the experiment 1. The hacksaw blade is clamp horizontaly / diagram State the method to control the manipulated variable 2. Plasticine with a mass of 50 g is clamped to the end of the hacksaw blade 3. The blade is displaced horizontally and released, and a stopwatch is started

simultaneously State the method to measure the responding variable 4. The time taken for 20 complete oscillations is recorded , t

5. The period of oscillation is calculated by using T = t

20 Repeat the experiment 6. Repeat the previous steps with difference mass of plasticine = 100g, 150g,

200g and 250g 7. Record data 8. Plot a graph of period against mass

(v)

(vi)

Total 12

QUESTION 4(a) The change in temperature/ The increases in temperature / the difference in

temperature of water when heat is supplied depends on its mass/volume1

(b) The higher the mass/volume, the smaller the change in its temperature 1(c) (i) To study the relationship between mass/volume and the change in temperature

of water

(ii) Manipulated variable : mass of water, m/ volume, V Responding variable : change in temperature, Ө Fixed variable : time of heating // density of liquid

(iii) List of appropriate apparatus and material Water, 500 ml beaker, sttirrer, thermometer, immersion heater, electronic

balance and stop watch (iv)

(v) Stating the procedure of the experiment1. Connect the heater with a power pack. Immerse the heater in a beaker of

water / diagram State the method to control the manipulated variable 2. 50g water in a beaker is weighted 3. Record the initial temperature of water, Өо 4. The immersion heater is started to heat the water for 5 minutes State the method to measure the responding variable 5. Record the final temperature, Өƒ after 5 minutes 6. The change of temperature, Ө is recorded by Ө = Өƒ - Өо

1

11

1

1

1

1

Repeat the experiment 7. The experiment is repeated with difference mass of water = 100g, 150g,

200g and 250g 8. Record data 9. Plot a graph of change in temperature against mass

(iv)

(v)

1

1

1

Total 12