360 Add Sci / P2.11 Putting radiatiion to use test 10_11 SQ answers

8/8/2019 360 Add Sci / P2.11 Putting radiatiion to use test 10_11 SQ answers

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American Academy LarnacaYear 5 TestTriple SciencePhysicsTopic P2.ll: Putting radiation to useM onday 13 Dec 2010SQ paperT im e: 20 m inutes

FORMULAEYou may find the following formulae useful.

. displacementaverage velocity = -----''-- - .--tIme

sv=-t

I . change in velocityacce eration = ,time(v-u)a = - - ' - - - - - - - ' -

t

momentum = mass x velocity p=mxv

force =mass x acceleration F=mxachange in . . I fi Id h h . hei h. I =mass x gravitationa le strengt x C ange III eig tpotentia energy . Pli=m x g x h

kinetic energy = Y z x mass x (velocityr'electrical energy = voltage x current x time E=Vx]xt

work donepower = time taken p=W twork done = force x distance moved in the direction of the force W=Fxs

SQPAPER 1


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1. (a) The diagram shows the sources of the radiation that people are exposed to in the UK ....... ~-

nam ral :& 7%

TV sets, ai r travel , lu m inou s dia lsfa llout : from wea po n tests

oc r:up a tiona lso llIc:eSdH ch a." "es from the nucl ear pow er indust ry

(i) Use the data to find the percentage produced by non-natural sources ...............:!.:f....~. ..fJ.:.~.t.... : . .s , . .l v . , ; l e : .. Y . . : . r - . t . . . . +.1t,>.:L .. .. ... ... ..... .... .... ........... ... ... .. ... :;;

-::: l3 - I . ........................ .-(2)(b) The diagram shows the risk of being killed by different causes.

risk of d~.atb due todiseases risk of death due to acddents ds).: of death due toradiatinn

.heartcaucer, fill!dis ea se :

all roo:lie.].&traCUtiOll 1 i g l : . 4 ll ! ID g 11 8Ji' ur a l nucl ea racddents al:~1i b~gromul iadastry

Some people argue that the nuclear industry increases the risk of death due to radiation.Do the numbers shown support this argument? Explain your answer.1~~t...f..~~b"':':>~ /.............. ~#.~ ~ h~~~ ~ O~ ~ c./..............~~.J; ~"">.~ ~ ~ ~~.~\l L .c.l ~.b..l .............................~~~.&~.~ ~-~,.\':~~ r/

(3)[Total for Ql: 5 marks]

SQPAPER 2


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2. Sohan's father, Carl, is a market gardener who grows strawberries.Carl wants his strawberries to stay fresh for longer.

The diagram shows how this could be done using a radioactive source.

rad ioact ive so urce sh ie ld

sir;l\'i 'ibem es m oveda long by belt

Pu t a cross . C ! iI T I in the corr ect bo x to com p lete each sen tence .alphapartides

(i) Carlases beta particlesoo because th ey a re best m pe netr a ting th rou ghthe straw berri es .

oe' mma rays (I)vaporatiou 0

(ii)Thi s p roc ess: is ca lled ionisation 0 trea tm en t and it work s: by killi ngbacreria .radiation ~

(I}

Some people are worried by this treatment.Suggest why.'l" U ...... H.. ".~II>.\.....",. .,.H $.~.~~'...M...'''\: M~ur'fA\L.. /

................. "'w.:.~ W .;. .~ ~.c...t..tr. ~~ .(1)

SQPAPER 3


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(1)

(b) The radiation from Carl' s radioactive source can be dangerous.(i) Describe one way in which the radiation can be harmful to him ............k-~ ~ ~ t;?~..A .

(ii) Suggest one precaution that Carl should take when using the radioactive source ...............\~~~\ ~ ..~.~ ~.~ .

(1)[Total for Q2: 5 marks]

3. A spark counter is a type of detector of radiation.

M ew grid --------z:------------Spark ,. '~

l~rre _

Its action is shown above where a source is held near to an earthed metal grid.A wire is maintained at -5000 V.The air between the grid and the wire is ionised and sparks are seen.This only occurs if the source is a few cm from the grid or nearer.(a) State two properties of alpha particles that suggest why the source is emitting alpha radiation.(i) l,:.9~~n .... . - y .

(1)(ii) ~ ~~v.-~ ~ " e . ( ~ ~i.L .

(1)(b) Name two other types of detector which can detect alpha radiation.1 C s~.~ ~ .2 ~~~~~ \:..\~ ., \ (2)SQPAPER 4


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(c) State one safety hazards associated with this experiment other than the fact that the radiationis ionising and can cause mutations ..........~\)lw.~.~~ .

(+1)[Total for Q3: 4 marks + 1 strength and challenge]4. (a) A radioactive isotope produces alpha, beta and gamma radiations. The diagram shows theapparatus used to measure the penetrating power of the alpha, beta and gamma radiations.

lead slit

m dIDactiveISD tl TC ,e absorb er

A background radiation count is taken without the source present. The source is then placed behindthe lead slit. Three different absorbers are placed in turn between the radioactive source and the GMtube and the count rate is measured. Each reading is repeated three times and the average calculated.

I- G - ' . 1 . - h - 'u b - e . - . J - - I COuntff I

~tH H....................... (1)(i) State the unit for the activity of a radioactive source.

(ii) In the experiment each reading is repeated three times to improve accuracy.Explain why .... ....... ... .. ~~~~ \~ ~~~ e? : ~ ~~ ~ .~ .................~ ~j">~ ~~~ ,.C> ~ ~ ~ .~ ~ .(iii) What is the purpose of the lead slit used in the experiment?..................~~~~~~.9.~ [ ..~~.~ ~~.~~.~.\. ..H.......~.~...4Y..'".w.I~~-:r1,.\,'yf;,H ..~ ..~~ .....

(+1)~ "'O~ ~~ c;. ,~ \AAJ ' ~C

(2)

SQPAPER 5


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(b) The table shows the results of the experiment.

I C1Hm ts /m in 36 496 ]96 36no source no absol41!)er paper

absorbera l l lmiDi"m n

a f l ) s M 1 r e 1 '~ead.

absorber

(i) What was the background radiation in counts/min?........................................~ .

(1)(iii) How many gamma rays/min from the radioactive source were detected at the GM tube?.........................................}.~~ ~.~ :::$..~ .

(+1)[Total for Q4: 4 marks + 2 strength and challenge]

(Turn over for question 5)

SQPAPER 6


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- -~ . - . . ~ - .

5. The rate of decay of a radioactive sample was measured over a period of 35 seconds. The graphbelow shows the results of this experiment

180

1 \\\r\ - .~

.

160

140

S 120: : : Jc.~ 100J! lc:: : J~ 80l; ". ;;s< 60

40

20

oo 5 10 15 20 25 30

time (s)

a. Use the graph to estimate the background acticity: c c (1)b. Use the graph to estimate the radiation of the sample initially: \~ (1)c. Use the graph to estimat the half-life oftbe sample: )....... ..JQV.x~.3:.:::.~O" . ( . H . .S.Q:X ..~ Q H -7 . . \.\0 .

............................... ........ .. ... ..... ........... .... ... ...... ... .................. ........ ... ...7/.

. .. . . . .. . . . . . . . .. .. . . . . . . .. . .. . . . . . .. . .. . . . . .. . . . . .. . . .. . . . . .. . . . .. . . . .. . . . . .. . . . 1:.S .s, .

[Total for Q5: 2 marks + 1 strength and challenge]TOTAL FOR STRUCTURED QUESTIONS PAPER: 20 MARKS

TOTAL FOR STRENGTH AND CHALLENGE: 4 MARKS

SQPAPER 7

35

(+1)

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360 Add Sci / P2.11 Putting radiatiion to use test 10_11 SQ answers