1964-06-02 — Page 10

日二十月四年甲服宴

英文中學會考物理科試題

WAH KIU YAT PO

ww me fecofange and omevallone you waaid.maka when asing moparátus drawn above to measure the latent feat of steam.. Warletters to represent your readings, and show by means of

'PHYSICS

b

Time allowed Two hours and thirty minutes»'

FIVE quaemope, shooting wc cennions from each section,

SECTION A

Define the teħm "centre of gravity”

State the law of moments'

A uniform enwer of card to cut into a rectangle as shown below.)

MA Maches

Show the position of the centre of gravity of this rectangle. Describe a method of demonstrating that in je in the positión you have indicated,

The rectangle shove is now cut into two unequal smakler sectangles. which are then dixed together as shown below.

maladepună 20 inches

∙10 ins

(a)

formula how the latent heat of steam could be calculated from thema Kirnare be heat absorbed by the glass tubes and beavy rubber stoppe

slopper

Explain two important precaunons that you think essential to oblatą)

naccurate answer with this apparatus.

An aluminium trap of thermal capacity 25 cal. per deg, C. contains 400.gm. of water at 25°C. is placed in a refrigerator where it. cools to 5oC in 19 1mjoy Calculate ibe zate la cai, per man, at which atioses heal

Assuming that the tray and contents ones heat at a data orang -- 0 cals per sec. from the moment freezing commences calculat how long it will take from that moment for jakne walej 10 DO

Ukaisut kratonico, # 60 kalupej gma}

Explain What is meant by niɛhe upper and lower fixed pälüfq** of my

the emometer,

Give a suitable formula to convert temperature izom ine Fanrennen

to the Centigrade temperature scale.. Clearly indicate the meaning of the symbols used in your joɛmulika”

(3)

1

甩

wse your formula given in (b) to calculate the 'Centigrade?

equivalent 01 Jahrenheit

Catrulate the temperature which is the sartie pe both ing Centigrade and i ahrenbeit temperature scales, Yout

rking must be show," sag 1.

The apparatus"below is a type of maximum and minimum thermometer,

(The indicators can slide along the inside of the glass tube and do gop completely block lidžiha alcohol, Ang past them but POL PANS

the massa

Tose me laŭ út moments to find the position of the centre of gravity of this combination, (Show all meşoproments clearly on a larga" „ [diagram),

Indicato

Gas

日二月六年国六九一层单

展出貸於根鉅的任務,經已十一年於亞 主任皮德羲先生,史苦夫牧師及醫

一歧意之兒童的改造工作,實爲當前急霧、 及個人之熱烈报梯上一憶五酐之新合,影師四人,廚師二人及女工IEKI

尤「習藝社」。創辦人爲的社會福利署煞致超置一百卅餘名,內七十二名爲宿生。 馬會發贈性欲,及九氣扶构会和其他社国酒六人,打字一人,庶務一人,工藝導 養的住呢? 「之,轉瞬十年,後有感於地方不敷應用,,下設監警一人,執行的委员會交辦之] 吾幼以及人之窈」,影「法幼中心」的 「扶幼中心」之前身爲「上海街見康 獲得自新之很会。現日扶幼中心已收容思,在都 乃海莉建新舍,旋得英女王街機產業書 切工作及貸對內部之行政及督導工作,導 絲,其實何難不是我們人類社會中每一成 年·宣告成立,並得社會媒利署的鼎力支持, 士,融會琴爲社會福利署感化組全任何建 和工作機構,正是今日杳港泊個計贲斯急 四,李經過節時間之獠劃,終於在一九五三年 正陶會長各一人八正發基黡按察司阿基鷳,像「扶幼中心」聚康具歙極性的中庭鹉 答允補助每年不足的晃費。如果考經之妹蹲先生),下龊執行委員會,委免十四人,可然姿的。「德運大同篇」中所說的「幼,

鲜人知,今梣予介紹如下: 公」,而「扶幼中心」便暴狀一。它款聖地構 桃瑙追而偶爾楬犯法枳或因周策股境惡劣 之地的港島上,由於生活競爭油剂,入口 山」,無可否認的是少年犯粜問姓在苍港已是,立基爵士於同年四月二日主持换菜篱式, 由沁會福利署兒章組,家庭得利會丶衖坊 ,與歐率老級相較有如小巫之覓大巫,然而,並易名爲「扶幼中心」,由前任淼督柏中必之兒蘇部份由感化規介松而來,其他 日趨銨派,爲父兄者莫不深感焦灼與憂慮 正式啟用。至於「扶幼中心」之工作,向,难有實等民牌介紹而來的亦不少,但其中 如何防範兒童走入歧途及對經已誤入 (一)扶幼中心的宗旨,收容因家 極灞把見及調查,認然適合低可的突。 儘管衬港的亞飛問題和少年犯罪把錄於一九六三年落成(位於土瓜澍法德街); (五丷由入扶幼中心之方烘:扶幼 (一)祖微及管理:「扶幼中心」 那些不幸的兇後,實在有予以援助的咨任 而籓於犯罪邊緣之兒養,使有接受教道及 尚界 追,所以就會問題日登用加,而少 會安净,更爲了下一代的宰,我們對於 年期事問題乃成爲不可忽的事,除了社

停此動不安的推代,特別在此劉淑 中安然自行帶同兒童叩門求助者多,只

当今從此類工作之公私立機構複本可數 得不到正常致移之見「XT

(#)

HALL V

r

扶幼中心」

一介紹

及足施速等各類敁育及康樂活動, ,由導師指導作集郵、口齡、木刻、俄 博遊戲,手工,故事國唱遊等。課餘之暇 倪眾則導成兩活動小組,由道經領域作集 並用,以作接受工作之準備。十二歲以下 心修理電路及廣告畫,旨在訓練兒童手瞭 業並盡。下午證四工藝班,分蓮舟、造粒 ,分六堀,課程與官立小學大同小異,該 CII. 工作及活動:上午爲基本教育

屁兒童及改造問題兒童的工作 這個社會福利機構,十年如一日地從事帮助贫苦家

兒價均受到個別之料甜点,開率及集 團工作並用,以毡求各兒舞身心之需求, 〔四〕對兒貸之管教:扶中心內之

云般老,以作適當之衛,

Define the mechanical terms: "work". and "velocity fauo“ Explain what is meant by the "efficiency" of a machine.

The apparatus below can be used to lift a very heavy toad placed i

on top of the piston. Rotating the handle clockwise

forces où

inm the cylinder and raises the platon and the load on it.

Load

Pistaa

which silda smoothly in

the cylindar

Arag på NË or pistas

[-]

Calculate the velocity ratio of the machine above. Expials soar +method clearlycka

the efficiency to #05 when the effort to a quib, forza tanding w state the bandie «lockwise” find the upwardʻIdeas Amstrad by: linu

Why would it be impossible for this machine to have an efficiency

Philiquen of the friction coală be reduced mixero,%

Make a copy of the diagram pating fa’î temperatri scale rangingi from, -10°C to 40°C.

Draw the mercury colume and indicators in the pagines whica #GOW BES

门

a present temperatoro eating.orz0°C;`

Fecorded minimum temperature of 1000

Threaded maximum baiingetimread 25°

How u mesecUFACT OF TAR KIBzmometar abera sleek:* y me expandiap

af die mercury calnizam and by this effect of haak župa dia 35 the

SECTION C

(B)

Draw a suitably fabelled diagram to show the formation of an eclipse of the sun Label the areas on the earth's surface ai which the sun will appear “parhaita" and "ically sclipsed"

Derine/the-term "zarractive index",, (1), Drawn diagram of a rectangulär glass block andřins

path of a ray of light traced through it by means of pina Explain how multable measurements could be taken from the ray diagram, 'and how they could be used to mekagri the refractive lodezjai un glass MIDCE.

The diagram below show alpping mirror which is

Ight travelling paralisi to an

7gef in's alis traninirani fiquid

ナ

-ika diagram (frejhand) and show, by módus-of,clezrðabeliyi

bas, la represented by the "yade.

thesware length,

the amplitude of the wave.

the positional preatest air pressure

the positions of greatest-movement of air

Give the formula relating the wave length to the frequency

and velocity of this type of wave. (ffymbols are used. their meaning must be staredi,

Musical notes may differ from sách äthựa in "pitch" and "quality" Explain what is meant by

andactor of the shape drawn is mounted on a glass rod and

ned to a high potential.

briefly, now you would perform each an vipartwelts Blitz tidu

(and obtais more tkän ove vol of readiøgå

GORSALES

The

he balloon

having denalty:0. p0s the

1b# Calculate the fofed la the rope B

rsaing.

released and rises at a steady speed of rate tie horie powarl at which it dosa

From what youste dose, the balloon get ifa etárgy to do this work dguinet

MARI

Complete the diagram to show what happens to Chu zay after passing the point D... Calculate all angles, and, olk" them clearly on your

Label tbs colour of sachiray

Name the paYLERGI

Describe a simplo experiment. In which a "proof plane" and at

sed to demonstrate how the charge will be spread

object.

For online t) how a lightning conductor makes use of electrical prop Hina of a sharp polated conductor.

diagrama, the direction of the lines of, force and Nadd.

120 metrāžure is moved well away from the stazeris fitted into the yapı

Explain briefly the purpoID and use of

the part "GDA

the part "Eu

"Amaye and a minian

at infinity, and each icentre of

Each fa then

mers are placed ald, by side and focusŢoë

cas and image exactly 4 cm. from the

object 4 ente high," at a distance of

aloitin 3 or 4 lines) what

ron ring when the pair of switch"

lecules in the closed

rms are moved, upwards from incu Opessoal position tortas pasien shown by the dotted linea

State: Faraday

(b)

12 cm

DIEW

size of the

Mark the principal"/

1); the cys-lens); (ii) the 'camura lank. ach dens clearly in your!

(d) In what way down the image on the reans of the eys differ fro that

ed on the film ofis 'crmera”.

ent above, you are given that the ele

10:001118/m/coulomb)

onnected. Irgm, the anode; taithe

ted eleg

20

Page 10Page 11