skema jawapan modul bab haba dan radioaktif 2015

7/23/2019 SKEMA JAWAPAN MODUL Bab Haba Dan Radioaktif 2015

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SKEMA JAWAPAN MODUL PENINGKATAN SPM 2015

BAB 4 : HABA

1 (a) A condition in which there is no net heat flow between two

objects that are in thermal contact with each other.

1

(b) (i) Temperature of glass in diagram (a) is lower than temperature of

glass in diagram (b).

1

(ii) Temperature of surrounding is higher than the temperature of

glass.

1

(c) (i) Condensation of water vapour // condensation 1

(ii) Temperature of the glass is lower than the temperature of

surrounding.

Water vapour outside the glass condensed at the surface of theglass.

1

1

(d) eated the windscreen // turn on the air conditioner.

The temperature of the windscreen higher than the temperature of

water vapour inside the car // temperature inside the car lower

than temperature outside the car / windscreen.

1

1 !

" (a) !# $C 1

(b) (i) % & 't

& 1##(##)

& # *

1

1

(ii) 't & mc+

c & 1## , ##

#.- , #

& 1 *g10C1

1

1

(iii) 't & m 2


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& 1## , 2-#

#.-

& 1.- , 1#

-

*g

1

1

1

(a) !#0C 1

(b) (i) Pt &ml

100 x 800 &0.5l

l &1# ### *g1(with correct unit)

(ii) 3o heat energ4 is lost to the surrounding/ All heat energ4 is

absorbed b4 the solid substance from the heater

1

(c)

eat energ4 supplied is used to brea down/ overcome the bonds

between molecules

3o increase in inetic energ4 if molecules

"

5 a i) The volume of the s4stem increases. 1

5

ii) When the temperature increases6 the gas spreads through causing the

pressure of the gas to increase. 7o6 the balloon increases.

"

b i) The mass of the s4stem remains the same. 1

ii) Change in temperature will onl4 affect the pressure and the volume. 1

SKEMA BAHAGIAN B

- (a) (i) 3et flow of heat is 8ero // fr4ing pan and water have same

temperature // rate of heat flow between two objects is the same

1 1

(ii) 7pecific heat capacit4 of 9 is higher than 3.

Time taen for water to boil in 9 is longer than 3.

Change in temperature is same.

When the specific heat capacit4 is higher6 time to boil is longer


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When the specific heat capacit4 higher6 the rate of change in

temperature is smaller.

(b) (i) :1is greater than :" 9 has higher specific heat capacit4.

1

1 "

(c)

7;


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Haba pendam tentu pengewapan air diserap daripada badan.

When there is air movement6 the rate of evaporation increases.

Apabila terdapat pergerakan udara, kadar penyejatan bertambah.

The bod4 feels cool after the removal of heat.

adan berasa sejuk selepas pengeluaran haba.

5

(b

)

(i) 't & ml6

(1##)(". , #) & #.#-l

l & 1" ### * g1

-

(ii) 't & mc+6

(1##)(5.! .)(#) & #.#-(c)("1! 2!)

c & 1 #"D * g1 0C 1


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(c)

@ is chosen. Eecause of its high specific heat capacit46 high boiling point6 big fan

and large number of fin blades.

@ dipilih. !ebab muatan haba tentu tinggi, takat didih tinggi, kipas yang besar

dan

bilah sirip yang banyak.

"

"

"

"

"

1#

T>TA "#

BAB 5 : RADIOAKTIF

1 (a) The time taen for half of the number of the radioactive atoms to

deca4.

masa yang diambil untuk setengah daripada at"m#at"m bahan

radi"akti$ asal mereput.

1

(b) ! hours 1


6/10

8 jam

(c) Fecreases / become less

erkurang

1

(d) (i) Eeta particles.

The penetrating power is moderate so that it can penetrate

through the orange juice.

%arah beta

&uasa penembusan yang sederhana supaya dapat menembusi

jus "ren.

1

1

(ii) @

@ has the highest rate meter reading.

' mempunyai bacaan meter kadar yang paling tinggi

1

1

(iii) 5# counts per minute

()0 bilangan per minit

1

(e) (i) ead

Plumbum

1

(ii) The high densit4 of lead can bloc the radioactive radiation.

&etumpatan plumbum yang tinggi b"leh menghalang sinaran

radi"akti$

1 1#

" (a) Gast moving electrons with high energ4 // electron // e 1 1

(b)


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7tate time &

Answer & " da4s

1

1

T>TA 2

(a) @adioactivit4 is the spontaneous disintegration of unstable nucleus with

the emission of energetic particles or photons.

1

(b)

(i)

? alpha particle

H beta particle

1

1

(ii)

H is lighter than ? 1

(c)

(i)

3uclear fission 1

(ii)

I Ea I I 1

(iii

)

% & mcJ

& (".D!! , 1#11)( , 1#!)"

& ".2 , 1#11 *

1

1

(d)

(i)

strong radioactive substances are handle using remote controlled

mechanical arms from a safe distance //

wea radioactive substance can be handled b4 forceps

worers should wear a special badge //

wearing protective suits and gears such as gloves6 e4e glasses //

1

(ii)

To avoid direct contact

detect the amount of radiation the4 are eposed to //

Kthe reason should be related to the answer given in (d)(i)

1

1#

"

15*

+" -

D" n1

#

151

-. &r

D"

(. n

1

#


8/10

5 (a) (i) @adioactive material 1

(ii) =t causes ioni8ation of atoms in the cells of our bod4 organ // ill

our cells

1

(iii) A thic enough la4er of lead will prevent an4 radiation from

escaping into the surroundings

1

(iv) ;se tongs when moving // picing it up 1

(b) 2.- hours "

SKEMA BAHAGIAN B

- (a) @adioactivit4 is the spontaneous disintegration of unstable

nucleus accompanied b4 the emission of energetic particles or

photons.

1

(b) 1.

".

.

=nitial activit4 is the same

time interval in Fiagram (a) is longer

rate of deca4 in Fiagram (a) is lower

1

1

1

(c) (i) The higher the rate of deca4 the shorter the time interval 1

(ii) The higher the rate of deca4 the shorter the half life 1

(d) (i)

"

(ii) 1.

".

The number of proton will decreases b4 "

The number of neutron will decrease b4 "

1

1

(e) 7uggestion %planation

"

"

"

;se forceps / robot

Wear a mas // goggle

The distance between the

source and the bod4 is fat.

The radiation does not

penetrate our e4es

;se a lead bo / container

with thic concrete

To prevent radiation leaage

to surroundings

; I""!

D" e5

"Th"(5

D#


9/10

"

"

"#

Leep the eposure time as

short as possible

Wear a film badge

'ut radiation s4mbol on the

storage bo

Wear coat lined with lead

The bod4 is not eposed to

the radiation for a long time.

To detect the amount of

radiation eposed

To inform users of dangerous

contents of the bo.

To protect the bod4 from the

radiation

SKEMA BAHAGIAN C

(a) i) ;nstable isotope that gives out radioactive emission. 1

ii) alflife which is a few hours

7o that it has enough time to be detected M1 mN


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(b) (i)

"

"

5

(ii) oss in mass

& "#D.D!" ("#-.DD I 5.##5)

& #.##D u& #.##D , 1. , 1#"2

& 1.5D5 , 1#"D g

"

(iii) %nerg4 released

% & mc"

& 1.5D5 , 1#"D , (.# , 1#!)"

& 1.5- , 1#1" *&

& !.5 , 1# eP

& !.5 9eP

1

1

1

"#

skema jawapan modul bab haba dan radioaktif 2015

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