4. In the ocean, the water is often more
calm. As the waves move towards the beach they
become more distinct as shown by diagram 4.1.
Study the shape and wave length shown
in diagram 4.1.
Di tengah lautan, air laut biasanya lebih tenang. Apabila
gelombang semakin menghampiri pantai, ombak menjadi lebih jelas seperti yang
ditunjukkan dalam rajah 4.1. Kaji bentuk dan panjang gelombang yang ditunjukkan
dalam rajah 4.1.
Diagram 4.1/Rajah 4.1
Based on the
information and the observation above:
Berdasarkan maklumat dan pemerhatian di atas
(a)
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State one suitable
inference
Nyatakan satu
inferens yang sesuai[
[1 mark]
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(b)
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State one suitable hypothesis .
Nyatakan satu hipotesis yang sesuai
[1 mark]
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(c)
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With the use of apparatus such as
ripple tank, stroboscope and other suitable apparatus, describe an experiment framework to
investigate the hypothesis stated in 4(b).
In your description, state clearly the following :
Dengan
menggunakan radas seperti tangki riak , stroboskop dan lain-lain radas yang
sesuai, teangkan satu rangka kerja eksperimen untuk menyiasat hipotesis yang
anda nyatakan di 4(b). Didalam penerangan anda, nyatakan dengan
jelas yang berikut:
(i)
Aim of the experiment
Tujuan eksperimen
(ii)
Variables in the
experiment
Pembolehubah
dalam eksperimen
(iii)
List of apparatus and
materials.
Senarai radas
dan bahan
(iv) Arrangement of the apparatus
Susunan radas
(iv)
The procedure of the
experiment which includes the method of controlling the manipulated variable
and the method of measuring the responding variable.
Prosedur eksperimen
termasuk kaedah mengawal pembolehubah dimanipulasikan dan kaedah mengukur
pemblehubah bergerak balas.
(v)
The way you would tabulate
the data
Cara
anda akan menjadualkan data
(vi)
The way you would analyse the
data.
Cara
anda akan menganalisis data
[10 marks]
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ANSWERS
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10
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(c)
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(i)
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1
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Write the aim of the
experiment
To investigate the relationship between depth and wavelength
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(ii)
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2
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State the manipulated variable
and responding variable
Manipulated variable : depth,
h
Responding variable :
wavelength, λ
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3
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State the fixed variable
frequency
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(iii)
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4
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State the complete list of
apparatus and materials
D.c. power supply, ripple tank and accessories, lamp, metre rule,
white paper, 5 pieces of perspecs/glass, stroboscope
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(iv)
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5
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Draw a functional diagram of
the apparatus
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(v)
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6
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State how the manipulated
variable is controlled
The current was switched on.
The put one piece of perspecs in the ripple tank
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7
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State how the responding
variable is measured
Mark the position of wave on the white paper as seen through the
stroboscope
Measure the wavelength
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8
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State how the procedure is
repeated to obtain at least 5 sets of results
The procedure was repeated for different depth by putting pieces of
perspecs on top of the previous perspecs in the ripple tank; 2,3,4 and 5
number of perspecs.
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(vi)
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9
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State how the data is
tabulated
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10
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State how the data is analysed
A graph of depth against wavelength is drawn
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12
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