エ久世界
勞工處長對工業安全主任指出:
日四廿月一年五七九一番公年四十六國民蕃中有教人工
..
白詞外置 一番被時夢個移或該在勞
等,氏緊衢項德 做促在硏 生由五十一處
名上要
骸二十名來自不同工棠榄集之安全主任,順利完成了一項周期六個星期全日上課之没奇訓練嗓
業安全勿作空談 實際行動避免意外
去年工作意外受傷續增令人失望 WELRYAN7hgy -EPRSFKHER
的空琰往花太多,而實際行動則不遠。
● 必氏】「臂方有實任殓保受過專門訓練的人士能够鸿用他們的知識,並將學習所得傳授予 一 致詞脚 - 促請各安全主任將彼等所學加以運用,同時令對彼等周四之人士如僱主同事及工人等都 書。他又說:「工作场所內須茷食安全問題,而且空談安全是無用的。本人時常感到有關工無安全 對氏在出府勞工處工業安全镒織中心主辦之第五百次———工業安全主任鎘程之籍乘儀式中
弍百三十四人死亡
去年本港工作意外
七三年,死亡人數爲三不四名,受傷人數則爲 人死亡,另有三带、七八零人受傷;而在一九 彼醒:「庥然看來,情况似有所改善,死
·彼指出去年香港之工作意外中,有二三四
一亡數字之低是一個好現象,但亞船上觀更架,快快。都會很直想織犁
DERTAKES FOR RHE HIEDS Dizga. Livet! 訓練中心自一九六七年開灣以來,已漸
五期星
星何真正改落。 CSERE-I
者處沿,家及名 方向上
九医
外實食香港工恩的一個再點。. 彼耀,映中心最令人注目的成就爲读在意外數字的具體而穆極的行列,證明有實際價值,因沖
ABERHERRIKO • #SFORE | EEKERÜNKOISETO.
(本記者)工友的利益・大家加入」,在工友被解始儻能 勞工處長彭雅士(左主持頒發結無脫書。一主要的任務,就是爭取「催不及一個月的四分之 「濃團結的力北, 影响就業機會,固成 好的還要你的希望在 間,何况是短在的七天 一了接整性的工會,會否在一個月內可以獲得
- 歇中心之訓縢人員會向超過二萬五千名職業
南二張五第日三十月二十年寅甲雷霆
WAH KIU YAT PO
報日僑華
結團強加景不濟經
到像的由躓大
·撲低例指出:過去
7
̇數規藪:
字定的
爭先恐後
距離太大了,七天的補一高警覺。(嬌)
HRAD
例中,可以補給一個月 因此,加入工會無疑是 像金:中於條」,工人不大了解的, 由工直楼工人爭取利绌,現雖有法例規定!但 的實例,指不勝宮,就【仍然每每有「數字遊 戲
,也可以補給七天,這明智之舉。鬬工友們揭一項
加手
加强注意
空空妙手
單
OHH
·上上班,在
來工
了帶餓不是?」小 「甚麼?今天忘的 N*-DESK- ∴」。借了十元給他 我先,明天源給你 ,有冇十元借住
來借臉說:「蝦 工友小李,他走過
*若千务工杌福鐡 車用。但早餐無出路的一殺那,失掉
上只得兰碎银,至多是在下車前,有人阻住 何因給文曾光顧,把衣袋的三十元摸去,莽甄涛 天下事,创垛去搭巴士,雷料車上人擅,不知如
・小陀
;在社會不景氣中,工。所以企在這裏等老友了,固然心有不甘,秉
幸,成爲「個案表性的
KRIKEHOEKH ***.
「慘訊應用時無得用,
「侘荷包」「一爲捲撲狼狽。(阿清)
A 12. 15 C. 20. D. 51
56
ABCDE
13、甲乙丙三人的平均年齡是12歲,乙丙二人
的平均年齡是10歲,問甲幾歲?
A B C D E
2017除某數,其商爲36,餘數爲2,某數是
P. 251 .S.443.
- 252 T. 447
R 354
PQRST
23.甲乙二人共有138元,若乙檢甲10元。
仍比甲多6元,甲原有
A. 567
D. 72
B 5970:
E. 8250
C. 6650
ABCDE
22.某數的3倍,除以4,滅去?,再加35,結
果是37,某數是
A. 8
0.14
28。某人前天炎去一箱橙的一中文1個,昨天 艾麗宗筋下的一半又1個,還剩15個,那 ̇箱橙原有
P. 621 -S. 654
R 64
PQRST
Q:63假 T. 66
29、陳先生三年的平均收入爲每年12000元,
最近兩年的收入分別為20000元及
̇25000元,求他五年内每年的平均收入。
P. 10200
Q. 11400
35.業數加6,除以3乘以7得35,某數
A.
D: 12:
8.6
E 15
36,兄今年23歲,弟今年7歲,幾年前兄年是
弟年的5倍?
P. 143
S. 4
a. 24t
● 5年前
R. 3430
PORST
37. 佛防今年的年歲是10年前年歲的3倍,偉
明今年幾歲?
P.10歲 0.15歲
5 25 30 PQRST
A 20
Q53
̇38四個數的和是134 其中首兩個數相同,最
後兩週數的平均數是28,來自數是多少?
P. 39
R-67
T78
PORST-
39,上等油每斤2.8元,中等油每斤2-05元,
現將上等油60斤,中等油40斤混合,每
ASAN
T.
122
POR ST
1
PQRST
27.2 升要加多少才得3升?
19.甲有150元,乙有130元,間甲能給乙多少
,二人所有才相等
5
P. 200
P. 57
S. 20
a 1070 T. 30
R. 15
PQRST
R·600立方厘米, 丁:900立方厘米
Q●400立方厘米 ́S 800X
PQRST BURBE
7.63
S. 3
a. 1/2
11.將88分爲大小兩殿,若其和篇應的4倍,
B. 33, C. 44
P 0.3
平均、和整、倍數、還原問題
(一)平均問題——先將各數相加,得其無和,
再以個數除之
公式:1.平均數=鯻和+個數
2. 和平均×個数
3.個數一棟和+平均數
(二)和部問題———先求大數,技术小數;成先
求小數,後來大數。
公式:1.大數(和十整)+
2.小數(和一些)+2
(三)倍數間......一假設小數是1倍,先求出小
̇數,然择把小數倍大若干倍,即稱大數。 公式?
1.日知和數
(小數一和(倍數+1)
【大人数×倍
#=#+ (-1)
大・小数×倍数・
E. 0.16
0.005 × Z-10
A. 0.005
5. M+15x3-9-60 M-7.
A. 96
D. 24
B. 36 C. 26 E.15
ABCDE
6.將110元分龄甲乙二人,如甲多得4元,則
P5150
a. 5250 R. 537-
S. 57 T 58
PQRST
甲乙兩數共180,若乙數加20,則和申數 ̇相等,求甲數。
14.34759.5897
ABCDE
G□□□□
15.汽车跑380千米,需要4小時,平均時速是
A = 76+* B 88+*
D. 98
C. 95*
E. 100
A. 12 B. 20 C. 241
D 30 E. 60
R. 16000
S. 1620072
B. 10
T. 20400
E. 16
ABCDE
23.大小二數的差是8,大數的3倍等於少數的
5倍,大數是
PQRST
四個數的平均數是16,已知三個數是? 1120·求另一個數:
盬奔嘰元?
P. 16
S. 38
Q. 26 R 36 T. 64,
B. 2.3370
PORST
R. 2.5
ABCDE
1.九個数的平均是12,前五個數的平均是 11,後五個欲的平均是14;中間的一個數 址
A.:12 B 13. 0.17 E. 54.
A比B大,它們的和比B大3,它們的差 £26.
C14
T. 1687
a. 2.4257
S. 8270
PORST
40。某個數的平均數為20,起首四個
數為25,最後五個的平均數為17,求罐式
R 10
ABCDE
24.甲乙二人的平均年齡是14歲,乙丙二人的
平均年齡是11歲,則
個?
P. 5
A.甲比丙小2號
S. 15.
921
PORSI
2.日知些數
S.90
P..60 Q. 70
·T 100.
R. 80
B.甲比丙小3歲
ABCDE
PQRST
C。甲比两大3歲
一個數經過加、浓、乘、除 後的結果,用逆算的方法来原職,就是還 讓的算法。加數的溫隙用法,跟數的 適用除法,其餘類推。
8.某校有學生460人,男生比女生多30人
女生有
16,從10喊一,可多少次?
D.甲比丙小6歲: E-甲比丙大6歲
(2) A
(3) B
4) E
(5)D
6) R
5
.P. 210
1
S. 240
Q. 215 A R. 220A PORST T. 245A
P 5 S. 49
0.15
T50
例:某數加一則得3
R⚫ 20
PQRST
□□□□□
兄弟二人識數之和爲46歲,兄比第大10號
・佉図意(?
A. 28
*P. 19
S. 29
27要加多少麵才是7887
Q- 27
T. 391
R. 2811
POR'ST 2.□□□□□
ABCDE
25,18與25.4之間,那個數目是在正中2.
A. 9
B. 12.7 C. 13.6. D. 21.7 E 43.4.
ABCDE
26.威强和大成共有52元,國張比大成少8.4
A: 1
B. 2
(7) T
(8) a
(9) P
D. 4
ABCDE
(10) S
(11) D
(12) B
(13) E
(14) D
(15) C
33.154去除淇敗,其商爲6,某
(16) T
(17) S
(18.) Q
A-9 D. 234
B48
E-324.
A B C D E
(19) Q
(20) A
(21) A
□□□□□
(22) C
(23) B
(24) E
(25) D
(26) a
(27)
34.某船洱流面𫘝,每小時5千米,逆流而數
(28) T
(29) S
30
Q. 21.87 S..30.2
,每小時2千米,求水流通民、
(3)) D
(32) A
茶水
PORST
A. IT
·D. 3**
B. 1.5* ∙C. ·2**
(34) B
(35) C
E. 3.5TX ABCDE
(37) a
(38). P.
P. 12
0.751
育
1.7-+-39-Y-56Y?
A 9
B. 10
C.-11
D. 12
E. 20
ABCDE
1975
則大數是:
升中試專欄
2. 72+ P÷23¬41
A 22
A4 B6.
C. B
D. 55
ABCDE
智慧出複批主模
D. 9.
A B C D E
數學科(十一)
N+0.0008-2 N ?
12.有五個數,其平均數是?,若各數加8,則
*其平均斷願爲
A+ 0.0004
B.0.0016
C 0.004
D. 0.016.
ABCDE
D. 200
Z-T B. 0.02 E- 2000
C. 201
ABCDE
A. 2
B-422
D. B2
E 16
的力量,共工友推國在出入多的工友的戒條。 這樣,才可以开普材來,上述這些話都成 势“工人大家庭,因得她有一些財不可當肌」長久以
售業工會關心
持支友工望希會工
- 會工入加躍踴友工籲呼袖領工勞
【對數不利代的體對-
工惠肚 異例淡的到
一沙團也款拿工裕會助了
開如風:
件殺 精力嗤,工要到友,親你解不勞工解中生 脚事,的量有和友,一歲但澳一到景工日儷所
DOOR IS DEE MESMARTREUKI
胡卽
身上有三百多元,粉
計車車防
•RESE-BK.
,以防 成交雀的光
,使數百人痛失家语,
日前九雅城堂大火
.技礜受災工友
災外通關毪啓
會:深水埗南昌街五四.
電話:三七九三九
汕頂街二五大排,后
又讀:工友们領了一世工人利的,其實,一慣你疫事的強吧。特別「九五。
,更沒有與一步務,一經划了聞脚,憑爭取利街乘搭公用交通工具上包 仁安大厦十五樓Q座,
TEE SACHERN BEAKHENEJ 14-1-<RVE
歡迎生
仔九座四機以所工袋工九靈
敎僑華
|
* 16
+ 化二科 十一、陳湛布。
CHEMISTRY (#11)
Solutions for Chemistry (#10)
Multiple Choice Questions
1.(b) 2.(d) §.(b) 41(0) 5.(b) Conventional Questions a
1. A series of carbon compounds.
containing the same function group in which each member differs by a CH, (methylene) group from the pre- oeding member is known in organic phemiatry an an homologous series. Each member of the group is called a homologne..
Since each member of any homologous series differs from the next by a CH2 group, the
steady gradation of would be properties from one homologue to
For
the marks and the
ing
there
the boil-
should
exity
increase rather regularly. Thus 1
for the saturated
hydrocarbons,
The first five
the general formula for the series
18
Clin+2
ani
P. 1820 2023 s. 30T 3620 - PORSI
2. □□□□□ 18.弟弟4年後的年歲,恰是現年的3倍,問第
10,一籃生果满2006千克,若昕象之生果比
整的本身重2千,閱鑒識多少
alcohol.
CH200:00+0
CR2COOH + C2HOH
C2COOH, CHO
The former hydrolysis producte
can be readily distinguished by
their difference in böling, pi points.
2. Carbon and hydrogen may be asticated quantitatively as follows. A kwn weight of
of dry compound is oxidized by bea
Deating oupric oxide in a current of dry air auch that all the carbon is converted, into carbon dioxide and all the hydrogen into water. The weights of water and carbon dioxide are measured by absorbing each in pre-weighed bulk of anhydrous CaC12 and potassium hydroxide respectively. The actually amounts of Hand C can then he calculated basing on the formlar H20 and 002
0.185 gm of an organic compounda gave on combustion 0.440 g of CO And. 0.225 gm or H2O. Thus weight of carbon
0.12 gm. 0.44 weight of hydrogen: -
0.225 x 18m =0.025 sonte composition of carbon (0.12 0.185) x 100 = 64.9 %% comparition of hydrogen
(0.025 0.185) x 100 = 13.5.
composition of oxygen 10064.9 13.52136
K
Q 64.9 13.5 comp.
21.6 16 12
13.5 1.35
.10
C
กา
At. Wt. * Comp At t
5.4
Empirical
formula
ethane, ethane, are re members
with butane pentane Pro JANË, molecular formulas CH C2 Cg+
6. and CH12respectivály. C100g hoiata from CH4
to 012 are 162, -88-5, -40, 0 and 36 mpactively..
(a) From the structures (CH3)3C0H
and CH20H 00HCH the former gen. be Bead to be a tertiary alcohol
Thus and the latter an ether. the bacio difference is in the presence of a reactive hydroxyl
in- a relatively group as against active oxygen atom attached to two alkyl groups. With sodium, the hydrogen atam in the aloc- holio hydroxyl group is displaced yielding an alcoholate:- 2(OH)300H + Na→→ 2(CH)CONa However with diethyl ether, there is no reaction.With phosphorous pentachluride the alcoholic hydroxyl group will react yield- ing the oxychloride and Bot.
(CH3)200+ POOL HOL
While the ether oxygen reacte to. the oxychloride without formatior
of Ho
-- PC15 →→→→
2001 + 20013
(b) From the structures CH2CO+O+C2 and OH CO ÓⱭн, the former i athyl acetate and the latter
Both are thus wethylpropionate.
Babara. The hydrolysis of both substanesa converts the esters into the corresponding neid and
Calculater M.W.74
Vapour density
: ་་:
As the calculated vapour density i the same as the experimental valve for the compound, the actual molecular formule is 100%
HK H
Possible struntural formulan are:
KH HH HC-0-0-0-0H
AHHH
HO-0-0-0-OH
H0-0-0-0-оH
НИНКЕ
нон
H
H
нен
H
HC-C-U-CH AHOK
H
Η Η
H H
H
HHH
HH
Ин
НИН HC-C-COH
HOH
H
H H
K
HOH
H
Queations for Next Week.
The questions in this issue are
related to 4, Pinciples of Chemistry
4.1 Atoma: 4.2 Chemical formulas; 4.3 Molecular weight and formal à weight. Study your notes and text- book before attempting the queatb
2號 ·R.3
Multiple Choice Questions
1. The chlorine atom art the
chloride anion,
(a) have the same number of
electrons
(b) have the same number of
came... protons (o) have the same rading (a) have the same chemical.
properties :
(e) have the same overall charge
2. If 1.15gn of a metal oxide upon reduction yielded 0.84gm af the metal M, find the most probable. formule for the metal:= 56);
·(a) 20 (4) MO2
(e)ada (at.wt. of
(b) MO
3. Which of the following gassa.st
.T.F. conditions has a gra molecular volume of 22.4 litres. (a) carbon dioxide (h) acetylene (e) hydrogen (a) none of the abov (a) all of the above
4. The atomic weight of an clement
is rclated to
(a) electrous only
(b) proton only.
(c) neutrons only
(a) protons and neutrons
(e) all of the above
S. If the atomic number of an
element là Hows, Hổ, tạo thế termine the following values axcept?
(a) valency (5)°
number of
electrons (e) number of neutrons (d) number of protone
(e) none of the abova
Conventional Questiona
1. Give a brief outline of Talton's Atomic Theory? How are these used to explain the experimental gravimetric laws of chemical combination?
How are these
understanding of the nature of matter modifier in light of modem. interpretation?
2,1gm of oxalic acid, containing
two molecules of water of crystal- lization per molecule are heated
What is the with conc. H2904. volume of gas formed at 100°C and If the gas 800mm of Hg pressure? was allowed to stand over caustic
would potash, what volume of gas remain when measured under N.1.P. conditions?
物理科 十一
PHYSICS (11)
KAK P.20.270
R 26.8 T. 43.670
ly expands. This 16 mom as tas apparent expansion of the liquid and is equal to the difference between the absolute (actual). expansion and that of the vessel
Actual expn...
pparent expa..
expn'. DI
VI vessel rent The absolute coefficient of ex- pansion of a 1 quid () is the actual increase in volume of unit volume of that liquid per degree centigrade rise in temp- erature,
The apparent coefficient (n
in less than the absolute coef- ficient (y) by a voluma approx- instely equal to the cubical. coefficient (c) of the material
of the M
Tie apparent coefficient of ex- pannión ula liquid (!) is the observed increase in volume or unit volume rer degree centigal vise in temperature. Deneities of liquid at different temperatures:
At temperature t, the liquid has
maas
volume
==
n
· At ait : ¿
Base
ature
volu? density
t, int
it has
The mean coefficient of expans- ion of the liquid between t and t' is
A
Since rase = volume x density
constant
m và and m*
- v'd' vd v'd'
at
But,
= v(1+0) and et' t
v(1 +rve)
1 +0 1+(t)
Wt. of 5.G.Lottie
14.5 ws.of B.G.bottle & lig at 150484.5 wr.of 3.0.hott erg at 10000182.38 Temperature rise
= 35°C Kae of mercury expelled-184.5-
182.3 2.2. Mase of mercury remained
= 182.3 14.5-167.8 & Coefficient of apparent expa, or mercury myt
Has expelled
=
masa zeneined x temp.ne 767-385 0.00015/245 C If the teperature of the oil bath be so
a body in a fluid is equal to the weight of the fluid displaced App. loss in wt. of brass at
(ww) Apparent loss in wt. of brass
att=" If, at t volume of liquid
displaced density
volume of liquid displaced density
Then, (W. - W) - V
Now, y, and v, concern with the expansion of brass, therefore (1+3ά(t − to}} \
V2 =
y.
=
Jalt - to)
and d concern with expansion of liquid with coeffi- cient of expr.:
=1+(to)
(w - w}{1 + 309)
1 + 3 αe)
Coef of linear expn of wood
along grain,
0.000004/°C Coef. of linear expn. of wood
across grain, a 0.000005/*C Coef. of water expn/Y-0.00016/0
At 1000, the dimensiona of, the wooden block is
The expansion of the wooden block per degree rise in temp. [ 120 = 13+ α Hlx(1+0) 4g (1+αc)
= d1tals • (1 +α)2(1 +α).
+ 29+ a22)(1 +9) $10(1 + 2α) (? '48)
10(1+2+a+20%*)
=
(neglect
2)
10(1
* Viol? + 296+ 9£}'. By Archimedes Principal.; Wt. of wood upthrust
W = volume immersed
x density of liq.
AT 10°C volume of wood
10
At 22°C
Density of wood Immersed volume $10 $10 = W Volume of wood
Density of wood Immersed volume
።
810
N
122
622
22
Ma expeljed
184.5182.7
= 1.8 8
Fraction of volume
KB remained
+
182.7 14.5. 168.2. g
immersed
mass expelled
* V22 22
陸永熾。
* V22422
71.3
Solutions for the last issue.
1.
A liquid must be contained in
If the liquid is heat- * vessel.
ed the vessel expands as well, and the observed expansion of. the liquid is less than it real-
Temp-rise; A' (t - 15)°C
=
#
mass remained x coel.
1.8
+= 71.3 + 15 = 86.300
2. Wt.of brata in aÂN
= No #t.of bruen in liquid at 5 - w Wt. of brata in liquid at t -W Archizeden Frinciple ubatan tral the arcerent lege in weight of
+
1
V10
$22
(24, + **)9
(1 +1210.00016
12-0.000014
x 1.00192
1.001988
≈ 1.000168
Questions for this week
1. (a) A 0-1-ke piece of metal at 100°C is placed into 0.12 kg of water at 16°C in a 0.03-kg vessel of the same metal. The temperature rises to 28°C. Calculate the spe- cific heat capacity of the metal, (i) neglecting the heat capacity
of the vessel; and (ii) taking this into account. Specific heat capacity of water 18 4200 J/kg K........?
(b) Ice at a skating rink is formed by removing heat from water to vaporize ammonia. Given that the laten heat of fusion of water 18 3.36 x 10 J/kg and the latent host of
134400 Vaporization of ammonia ið J/kg, calculate the number of grammen of water that can be frozen for each gram of ammonia that is vaporized.
If the cooling system contains 15 kg of ammonia, which circulates once every 5 minutes, find the time required to freeze 600 kg of water
(c) The specific latent heat of fusion of lead is 15000. J/kg. Its melting point is. 330°C and the air temperature is 30°C. Specific) heat capacity of lead 150 J/kgK (i) How fast must a lead bulletth
travel so that it reaches its melting point on being sudden- ly stopped? (11)Row fast must it travel if it
ie melted?
the
(iii) Neglecting air resistance,
find rise in temperature of a lump of lead when it is brought to rest suddenly after falling freely for 100 m. (iv)How far would it have to
fall freely in order to melt on stopping?
(2)(a)
Time-
Two pieces of solid, X and Y of equal mass but of differ ent materials are heated by bunsen flamet at, equal rate.
Two graphs are. plotted with temp. against
time.
Study these graphs careful- ly and answer.
the following:
Point out and explain briefly which solid bas a
(i) larger specific heat capacity (ii) higher Belting point, and (ili)greater specific latent heat
of fusion. (iv) Which liquid has a larger -
specific heat capacity? (b) An electric heater is operated for 3 minutes in a beaker contain- ing 0.25 kg water. If the tempera- ture rise of water is 36°C, cal culate the rate at which the heater is producing heat.
The water is then heated to boll. After 10 minutes, boiling, 56 g of water have been boiled away. From these resulta, detar. mine the specifie latent heat of vaporization of water.
Criticize the error made in experiment.
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