10.skima jawapan bahagian c

8/17/2019 10.Skima Jawapan Bahagian C

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Skima Jawapan (Bahagian C) 201

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CONTOH JAWAPAN KERTAS 2: BAHAGIAN B (SOALAN 9 /10)

SOALAN 1

Suggest!" E#$%&"&t!"s

Thermometer is made from transparent glass Durable It is not easily broken

capillary tube is made narrow and thin more sensitive

shape of the thermometer is round/streamline has a magnifying effect

low freezing point It can measure very low temperature/ not

freeze at low temperature

Thin glass bulb’s wall Absorb / transfer heat faster

SOALAN 2


Aerodynamic shape / stream line/ torpedo Reduce air resistance

Low density material// Strong material// high

boiling point

Lighter // oes not brea! easily// does not

melt easily

"as li#uid o$ygen %oosting combustion // supply o$ygen for

combustion

Retro roc!et /"as several stages that can

slip/strip off

To decrease mass

Increase the size of combustion chamber &ore space for the fuel to be burnt

DISEDIAKAN OLEH : PN ROHAIDA BINTI ABDUL HAMID SMK

TAMAN DAYA

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SOALAN '


%alloon should be large size To create sufficient buoyant force due to

greater weight of surrounding air

displaced'

%alloon material is made of light weight material

li!e nylon

The total weight of the balloon is less

than the buoyant force//reduce weight

%alloon material should also have a high

melting point'

The part of the balloon (the s!irt) near the

burner must be fire resistant /coated with fire

resistant material

It will not disintegrate when e$posed to

hot air

So that it doesn’t catch fire easily

The burner burns (li#uefied) propane/gas *arms up the air in the balloon

A large fan is needed initially To blow enough air into the balloon

The bas!et must be made off light and

fle$ible/safe material (e'g' rattan or cane woven)

+rolong the collision time between bas!et

and ground// reduce impulsive force when

bas!et hits the ground

%est times to launch the balloon are early

morning and late afternoon when the air is

cooler

,ool air is denser- providing more

buoyant force

SOALAN


"ollow stopper +revent heat lost through conduction

ouble layer made of glass "igh specific heat capacity

.acuum in between double layer +revent heat loss

Low density material for the casing Light / reduce massDISEDIAKAN OLEH : PN ROHAIDA BINTI ABDUL HAMID SMK

TAMAN DAYA

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Strong material Long lasting

SOALAN

Suggest!" Re&s!"

%uild near bay *aves are calmer due to divergence ofenergy ,onvergence of waves at the cape

The bay is shallower ' The speed of waves decreases'The amplitude of waves at the bay issmall'

%uild retaining walls Reduce direct impact of the waves on theshore' To reflect the waves from the shore'+rotect the area from large waves

%uild concrete structures with a gap in betweenat designated area for children

*aves passing through the gap will bediffracted in the children s area 'Smaller amplitude of the diffracted wavescauses the sea to be calmer there'0nergy of waves decreases'

SOALAN *


istance between two audio spea!ers

1 near to one another

Redue inter!erene

+lace spea!ers in front of the microphones Avoid humming// disturbance

+revent the sound from spea!ers beingamplified again by the microphone

,overs the wall with thic! n soft curtain/ a layer

of soft board

To reduce the echoes effect/ Soft material

can reduce reflection of sound wave

2se chair with thic! cushion To reduce the echoes effect/ Soft material


,overs the floor with thic! carpet To reduce the echoes effect/ Soft material


,overs the wall with uneven or rough surface To reduce the echoes effect / the reflectedDISEDIAKAN OLEH : PN ROHAIDA BINTI ABDUL HAMID SMK

TAMAN DAYA

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waves are in various direction

&a!e sure all the opening at the doors orwindows//windows frame are close up To avoid diffraction of sound / to avoidnoise from the outside

+ositioning of the spea!ers and the audiences

is arrange in a way as such that they form a

triangle

To produce a clear sound staging effect

SOALAN +


Steel alloy Strong- will not brea!e easily

2 shape steel alloy 3ot too heavy

Trust and support 4oin ,an support bigger weight

Large diameter cable Less resistane

&ade from small diameter and laminated wire Reduce eddy current

,able made from low density material ,able is not heavy

SOALAN ,


Attach switch for each lamp To allows each lamp to be switched on

and off independently

,onnect the metal fitting lamp to the earth

wire/cable

To flows electron (e$tra) to earth to avoid

lethal shoc!

+arallel .oltage across both bulbs is 567 . / ifone bulb blows another bulb can still

function'

2sing only 567 . light bulb To ensure the bulbs light up with normal

brightness

Step down transformer / adapter Reduce the voltage from 567 . to 85 .'


TAMAN DAYA

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SOALAN 9


2 shape core $o inrease the strength o! magneti%eld

Attach spring to the armature The armature will return bac! to its

original to its original position when no

attraction occur

Attach contact screw to armature ,ut the circuit when the armature attract

to the electromagnet- so that the hammer

hit the gong continuously

Increase the number of turn of coil $o inrease the strength o! magneti

%eld

2se soft iron core &asily to be magnetised or

demagnetised

SOALAN 10


The half1life should be a few days long This allows for the location to be detected

and thereafter the radioactive

contamination is reduced

The substance should emit 9 particles This allows the radiation to be able to be

detected above the ground


TAMAN DAYA

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The detector should be able to detect 9 particles

(low ionising particles) // :& tube

"igh ionising particles li!e ; and <

particles are absorbed by the ground

Substance in li#uid state 0asy to flow in the water

"igh penetrating power +enetrate the ground so that it can be

detected by a detector

CONTOH JAWAPAN KERTAS 2: BAHAGIAN C (SOALAN 11 /12)

SOALAN 1

C-&.&te.st Re&s!"

The length of the rope is appro$imately same as

the length needed

so that the length is not too long or tooshort'

The density of the rope has to be small to ma!e it light

The snapping force is larger to ensure that the rope is not easilybrea!'

The diameter of the rope must smaller =ccupy a smaller space

The best choice is >

SOALAN 2

C-&.&te.st Re&s!"

Small diameter 0nough space to the spring to be install

&ore than 8777 3 ,an support heavy load

"igher spring constant Small compression of the spring

Small natural fre#uency Reduce bumpingDISEDIAKAN OLEH : PN ROHAIDA BINTI ABDUL HAMID SMK

TAMAN DAYA


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The best choice is

SOALAN '

C-&.&te.st Re&s!"

Streamline / larus reduce the resistance of water/

!urang!an rintangan air

ensity /!etumpatan rendah higher buoyant force/ daya apungan

tinggi

Specific heat capacity high / muatan haba tentu

tinggi

absorbs heat slowly/serap haba dengan

perlahan

"igh strength / >e!uatan tinggi ifficult to damage / su!ar rosa!

S

SOALAN

C-&.&te.st Re&s!"

Type of window ? glass withstand higher temperature / highermelting point // glass trap radiant heatbetter than plastics

2se multiple reflectors reflect more sunlight/ /concentrating morelight into the bo$

type of lid used is clear glass lid allow food to be observed while it iscoo!ing without removing the lid

use dar! aluminium pot suspended in a clear

pot

trap the heat inside// trap heated air ne$tto the pot // isolating the air inside thecoo!er from the air outside

solar coo!er S

SOALAN

C-&.&te.st Re&s!"

"igh refractive inde$ Total internal reflection can occur easily

&aterial with wea! rigidity The optical fibre can be bent easily


TAMAN DAYA


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&aterial with great strength The optical fibre can last longer/not easilyspoil

low @ of light energy

&aterial R

SOALAN *

C-&.&te.st Re&s!"

low mass more agile

high height Able to shoot goal

responding time fast catch ball within short time

power high(short time to move bric!) will not tire easily// more energy

small time to complete 877m run can run fast

,hoose ,

SOALAN +

C-&.&te.st Re&s!"

Low density material ,oil has smaller mass / lighter

"igh number of turns Larger force acting on the coil / higherelectromagnetic field strength

"igh strength magnets Larger force acting on the coil

&ore segments ,oil rotates smoothly

&otor R

SOALAN ,

C-&.&te.st Re&s!"

Low density 3ot heavy/easy to carry and moveable

"igh melting point 3ot easy to melt when the temperature ishigh

Low o$idation 3ot easy to rust/long lastingDISEDIAKAN OLEH : PN ROHAIDA BINTI ABDUL HAMID SMK

TAMAN DAYA

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"igh resistance *ill produce energy as heat

S

SOALAN 9


"ollow stopper +revent heat lost through conduction

ouble layer made of glass "igh specific heat capacity

.acuum in between double layer +revent heat loss

Low density material for the casing Light / reduce mass

Thermos S

SOALAN 10

C-&.&te.st Re&s!"

solid form easily handled and does not ma!e a mess'

%eta particle less dangerous as compared to gamma

rays'

half1life of the isotope must be long enough can be used for a longer period of time'

&edium penetration power able to penetrate paper

Strontium17 is the most suitable isotope power'

TAAT


TAMAN DAYA

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10.skima jawapan bahagian c

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