·頁二第張七第 日八廿月十年寅丙磨夏
1987中學會考 試題預習專欄
物理(十)
Assuming that the retardation to be
WAH KIU YAT PO
uniform, find (a) the
retardation he
further time that the cor
Let
retardation)
distance travel
led by the train.
before it comes
to rest
will need to travel
before coming to rest.
Solution:
25 ms
明德出版社
MILL & DALE PRESS
Revision Exercises
Cert. Exam. (1987)
PHYSICS:(10)
for
Chapter Mechanics.
4.1 Displacement, velocity
Note:
and acceleration, Displacement: is
defined as the
PA
di stance travelled in
a certain direction. Being different from. distance, tis¦ A ̧ vector. Velocity 真!! defined as the rate of change of displacement with time.
Acceleration is defined as the rate of change of velocity with time. If body Boves with uniform acceleration along a straight line, then
2a.s
initial velocity, final
1. If the body, is
under-going.
velocity, time taken and
distance-
travelled
deceleration, the
sign of: "afe:oppogi 老照
C to that of the velocity,
2. If a body starts from
3. If a body comes to rest,
Example 1 S
A truck travelling
at 25 ma
velocity
has its
reduced to
+2(a) (100)
az-2 ms (the
negative sign indicates
retardation).
(b) bettatie tide:
taken for the truck to reduce its velocity frou 25 -1
to 15 ms Apply -uat
15
25+1-2)(+)
Let tostle bize taken for the truck to reduce its:velocity from.
+7.5
to as 0=25+ (= = ) { t ;):
50
Example 2 yea
time required
A train which is mɔving with uniform acceleration is observed
cover two equal succes.. sive distances, each of 400 m. How much further will it travel before coming to rest if the acceleration remains unchanged. Solution:
Let us the velocity
the beginning
of the first 400 m.
the acceleration
Apply sut+zat
100-u(10)+(a)(1))2
5a+u40
Again, apply aut
for the distanc travelled点:180g=30s
From:
400+400=a(36)+zel
2(2).
是如低
落在水族箱裡,多種植
·安魚蒸
定拿!
上魚藏放
約若章身置
牠的之
性度别上才见不同的特助的。
,成熟後的大魚,在兩 繁殖上,是有很大的帮
月至六個月後應告成熟組來培育,此法在未來 從雄魚開始,經過五個引雌雄後,可以分成 ,在水族箱內解後,喀育,已接近成熟,並 新魚經過四園月後
黑色,也會變成灰白色,生長。 特 ,就會變白,本來是深,才能在正常的狀態下 感到不安,身上的顏色來培育,這樣較細的 色才見據點色,若她們,的挑選出來;另劃一看 ,凡境安定,魚旱的身 有此情况後,應將陀大 ,好讓魚還有藏身之所, 有大小不勻的,若發現 一些水蓋,或放置石山,新魚在接臂中,時
·「選新魚來代禱。
出魚則好相反,在
如裙,而且在末端上 但在那鱗上,却見寬其 而且身段也略見修長,一 身形是比較俪弱一點,
·雄魚在同長大, 亦如一般羽生魚一樣。 昨鵡,在兩性園别上、 在成熟期後,才能隔别
徵的繪現。」
此魚也不例外,要
谷禾尾長
·在區亞長尾
種名城印印泰內熱產是又未
·種均度尼颍 帶自燕名容長
同季成長中,身形比較」,中國南端也有幸福。
水
一定的操鵡,而且,還已衰老,多告放棄,另 質美水溫,仍延保持,媽其產力送站及魚做 二,專業人士不會再用
Example 3:
The required distance
815-800-16.667
(Ans.)
The relation between the velocity and time of a body is as shown in the the graph, Determine (a) · its acceleration at t=69. (b) its acceleration at
acepleration at t=40s (d) its acceleration at 1-509. (e) its total displacencet (!) its total distance travelled.
Solution:
(a) acceleratio
=slope of ON.
3000:
10-10
ms
(b) acceleration
alope of AB 30-50 20-10-0
(a) acceleration
-slope of ED
-6-30
44-20-
(retardation)
(1) acreleration
-slope of DE
Its Intal
displacement Area of BARC -
Área of ACDE
=7{10+40)(50)-(60-
·401(0)
(Ans:)
(1) Its total distance.
travelled:
熱帶植物介紹
得
報日僑.
心
Farça of GÅNG" Area of ACDE -810 D
Motion under gravity
Vertical motion under gravity.
Take the upward
direction as positive
For free fa
body
we take u=0
Note; his negative.
Example
because the body
below the point of
projection,
vis negative
because the body if falling down.
Astoue is thenwn vertically upward with
velocity 40 ms-1
the top of a building f Weight 500 ̧à......
Find (a) the maximum
height of the stone'
the time taken for it to fall to the ground. the velocity with which it. strikes the ground:
(Take acceleration que to
Coty g-10 ns
vwo (at the highest
pajut
*10 as y
想悲
40 =0 -2(10)(h)
the greatest
height reached:
by the stone is.
(Ans:)
(b) Apply s=ut—zyt
10,
SOU
~500=40t--(10)(t")
100-
【整的沼地信,牠們
心亦愛過著草梅生影袭 ,常會聚上百款,在第
,在大自然裡,此魚
統工及國各懂不
【上的地位,
是的秀雨
來
*捕食水面下的蚊蠅及水
電容新境
·面上的浮游生物,祂裏
的爬虫,牠們反感與
·黑裙魚籃卵生獲產卵,舊水改及花花 池邊水域活動產下卵子,才致跟上大阪,四處如果產景過多,而分由
·庫魚亦曾選擇低淺的地季節,留會向低多的,直到雜魚長大之後將較大的水族箱來培育, 蔡殖,每當進入產車,原來,南魚在繁殖去。賽後培育,應將能魚蘚到
紅白雙色小鳳仙
余
離仍來獨子自
六期星
日九十月一十年六八九一圈公年五十七國民華中 魚虫烏花育教
187-4(-19)
Bs.
(c) Appl.
-(10) (~500)
x=107.74
(rejected).
(the negative. sign indicate a downward & velocity)
the stone strikes the ground with Speed 107.74 da:
經濟(十)
朗德出版社
MILL & DALE PRESS
Revision Exercises
for
Cet, Exam. (1987)
ECONOMICS (10)
LOCATION OF INDUSTRY
Questions
1. What are the main
determinanta of the locetion of låglik industries in Hong Inng?
The gain, determinỳnts of the location of light industries in Hong Kong
(1)avatábility of labour
is critical to light. industries which are mostly labour- intensive. Thus, industries tend to be located near population centres,
light industries in Kwun Tong, Cheung Shan Wan.............
(3)Water. surely, th运
second determinant,
sinportent to those light industries which requireviverge: amount. of water, e.gadyeing, Jaundry, brewing and chemical industries.
(3)The third factor is
power which 18 essential to practi-
(4)The fourth-determin-
cally all industries.
色色
且最
自動雙瀅色神
ant is external
economics. The“ dyeing and garment manufact- aring firms as well un new textile firms teirel to be set in Tsuen Wan for the sake of external economies..
(5)The fifth factor is
lend value. The rising laud prices actually force certain industrialists to Incate their
industrial sites in
less developed areas.
(6) The sixth determinant la transport, and developed transport enables firms to set.
ap their factories away from population centres.
(7)Another factor is
government measures such as, the setting up of industrial ESCLea Provisional Authority, the Planred development zuues for industry, eg. Shatin, Castle Peak etc., the "prohibition of certain industries in certaid areas to prevent pollution, eg, the asɛiguing of land for special projects.
What is inflation and are the cou causes of inflatioú?: Discuss tae effects of inflation upon the daily lift of an :: average Hong Kong consumer. today? Inflation refers to conditions when the general prices and costs wf goods aud services, are rising continuously. (i.e. the value of money is. declining in a continuong manner), Tic connion causes of inflation are as follows:RY (a)Inflation may be
caused by an increase in the amount of money. in circulation or by a drop in the supply of goods and services. (b) 11 may occur as a
realt of naceast demand (1.e. demand pull inflation) induced by an Increase in demand
goods and services by consumers as well as averspending by firms for by goverumenta (c) Inflation may occur
because of rising.
costs of
「的箱
圓形的身軀,焉得如神
箱內,已有一段頗長
遭漚强敵,往往也能化 1彧顔色,在大自然裡, 扁的身形,身上的保 4. 甚為捕,牠們利用 化,而且魚在游泳上 時會深淺,適應環境 紅色:有保護色的作用。 色,而且,魚身上的
在背部及足梭兩處 並分成藝全部份。 白色,並呈現灰黑色, 一動,烏薄的發軀,吴湖 雙回大的園賾,譚合輯
·逆有兩點黑色斑點,一 色灰黑色,身的兩旁, 主神化魚一樣,身上的顏
张魚,獨背鰭短小,但
中,顏色最然,幾近乎黑
胆鲹知竟大如裙,並辦
的時間,魚本身有着作
得過兩
很魚遭
「很難尋找的。:
兩季繁殖瞉為旺盛, 過,在冬華神,若保湿 價未見下降,錘頭新鳥 自亞熱帶區各地,如何的。但仍飛在一起水 最常形,不 最多而比去年早,但宮見售的長尾禾谷,是來用,產烏蠢作難維同處季。 原,不過,仍是以夏以後,不如去年一樣,供,不過,在市面上所 是草棲,在成熟的一到做魄,才能順利越過多
此魚的尾初特别修長,
「大,太大的產箱,反會天折 ·[對的。 . 之後,便黏在石苦上,自從泰西及印尼各地有,均呈白雪,背號及尾 讓犯于自我风化。他附性黑色,尾翅基長,可達加,不對,中國的產性難有此成就。並 產舉,即將兩魚嘅關,供選之後,日始,顏色最浪整,呈現中國的產種比較容易成 階段,非有醉心培養, *劑避開母體的卵子 有供世,由於供量稀少好看的琏移後,頭部及雌雄配上,才肯遠離, ;經過雄魚作體外受精,故當時的售價甚衆,跟現最流厚,胸上腹部 氨水其他緣生估。,商人,而且遠會向以對 悠產卵用。,秦約及印尼等地却未,並以深花顏色而成很 棲息,其有成然之後, 野生离烏,若經過培養 一,還需放入些石苦,作;來源多來自中國南端上羽毛以卵啡色得主色父母,仍是在老巢四周長尾禾谷嫿然屬於 內的水質與永昌道當拔管。贾尼系谷在較早時可以區別,她見比鳥身這大熊進,仍不會這裡發一草,更為有潔。 十四英时大已足夠,箱類肏局,一定要雌雄並可憑拜本身的羽毛顏色 巢多在疏林中,離兒內有矮樹及小水池,
一記錯的難題甚多,如幼,但在巧實時,對榮的特徵,應是沒有去分可爭 「產魚雖於照顧卵子,有 故此,凡培養溫一,原來,中國產補,每日後在草坏活動,但興建一個巨大的岛, 一切咎傷,還有不用太體或雄,多會在半途上點不同特徵,多不會弄克爽四怨兒不等。 如果還境許可,可 ,不過,在冬季繁殖,略為低廉。當然,不錯,若憑态岛本身處的。 寫殖此魚,事前的,若甲續培養,不帶廣種却不難,憑藉以下兩支路殖,每次繁殖兩鍵則更佳。 魚的飼料,在冬季裡學到的產品,在每一個產時熄噫,或搭眉觸等, 得堂,亦可以進行繁殖,在百元或以上,雌岛去區别才能绛州产地尼有不少未成熟的雄鳥同 尚未見旂殖成功,由於 在培養上,有人說 贫,不過,能達到如此
進入產季,產島雖在小園地或在台露上,
1 季裡,能作兩甚至三次 特製一個寬大的跑作 紅後,似解人挫,不會再
夏季是繁殖期,一雙成浪大的籠子,反選用知
· 在原產地,每年的在饲養上,應選用特别
始有:
上其仍然
巴兩個星期護培之後,再唱工為魔的另一個因对方法就容易抵受,比較容易越 翊弄传·烏本身便做得 的水城露會,亦可用其 塑脂及有移的色海上救一游有蓝色的光胗,雖然冬季來臨,新品也 時切勿將尾殺弄污,尾 放入倒科,飼料以幼嫩 及中國的優秀,不論在黑色的乳類上,也送出兩個季節適應及變後,太陽之下晒一小時,平 出離魚第二天,我前,帶區各地的走祂,均不,在修長的尼知上,唯,在夏若手培養,經過每日发部戲一次,並在 自會用化,菇卵不遷 飼養老而西,來自亞熱樣美觀,若屬中國產種 加政,如果在運線上 長的尾刻是最珍樁的, 是在供應上的時間,來多。不舒服。
經過日之後,那不過,攔有經驗的一英呎或以下,雌雄,,體力较强,而且耐寒,
長尾禾谷對自己修
他于埌代替,雄魚經過
一半長成魚形,有一個月
如何選擇環境棲息及“贴全生長。,留在低淺水域,未肯離隔,若水質不當,傷亡 七次教作連發性繁殖, 上述性生活,為四類,一為可藉環境保護,自然那化,鯉魚孵出後,仍 塔賽,雖然牠們生錢力一個星期裡,首俗五至二年生的,所以我較喜紙非洲小鳳仙。為,可惜這個品種我不能把它保留下來,因含有
,但牠們並不會係與及保護,低養的水域,枝後方倒不種耐熱,來此,当前吃飯。安雙水族龍來培養。 非洲小鳳仙跟中國的鳳仙花不同之處是非,人意愛。
海王丸
非州小鳳仙的顏色很多,有紅,粉紅,攪
·非洲小鳳仙是單瓣花居多,也有一種〔俗一年的氣溫太冷,結果冷死了直到今天四處找
烈,仍然找不到一盆斑葵小鳳仙,
並在培養上此為
·非洲小鳳仙筈要陽光,档株矮性,分枝多
在生活習慣上,最喜歡過兩星期休息後,便可 ......仍是很大的,原來此魚 在每次繁殖之後,僅絕 稱雙托)的,我喜歡單瓣的。 在低酸性度的水質生区,作第二次點於,楊過面,楊紅,白,紫等。有紅白雙色的,尤其是。陽光缺乏,枝莖長而較軟弱,開花少繁殖除 五至七次繁殖後,即會花小成十字白色的紅白雙色的非洲少风仙巖得 用播種外,抽號,成活率很高,
;過份鹼性壓的水質,
一招徠,需要保暖,奥海王丸生長相同的有「金碧」、「飛花玉」、「牡特强,若水温低於攝氏 植物,夏天灌水不宜過多,每四大流水一次,冬天子樹,海王丸非同然牠們孟根生,而我力復產力,不過,經過一 有美戲的大花,海王丸喜歡半院的地方生長,所以是很理想的窗前他們的傷亡率影戲,難停止,要經過一段较受 點擊十五度,牠們在生活上一種牛公死後的老魚,就
是受到影响的。如,化,而且為身亦兒衣老
因此,在培養上,
production,
箱捷勝成,於即
维内内,姿功在此受
" 不錯-溉裙在水族
西者年
印不乏
黑裙,這個名字對
魚
一者不會感到陌生,早期
·西印度草岛引入本港,
即受到樹養者歡迎,由
,於此魚在游姿上甚活
一,在母養上,又極容易
一成功,有神化魚外型,
箱内,担任重要角色。
LRe:cost-pusi. inflation),
(1)Inflatina may be
caused by natural disasters, social
di starfauces or war It may also be caused by the deliberate policy of the government of
speculatum who stack... pile goods in order to force the price level upwards to realize abnormal profits. The effects of inflation upon the daily life of an average "Hong Kong" consumer are
The effects of inflation upon different. groups of consumers are essentially different. In general, there will be rise in the price of consumer goods and services, eg rents, food-stuffs etc. The purchase and consumption patterns of consumers will change accordingly, Necessary goods wil 1: increase in demand while? spending on luxuries vil be decreased. Sayings will also be less and people in昊ry to more money to increase their real incomes. Generally speaking' debters and people who se incomes respond quickly to inflation wïil gain while creditors and people with relatively fixed income vill lose, lover income people wiHl likely be hurt more because of the rise in: the prices of necessary, items. Thus, there is generally a redistri bu- tion of incone. The.
Icple in Hong Kong wil tend to purchase more imported items since these products are now relatively cheaper than before because.of.. inflation. When hyper- inflation becurs, there will be h, fall inigu investment and uncup lay- ment will result. Likes
aue prices exports of Hong Kang rise due to inflation, competitive power of these itens vill be weakened and exports. tend to decrease. Since Hong Kong is so export dependent, the economy. of Hong Kong and hence the life of the consumers will be adversely
affected
裙黑
田的
花鳥 虫魚
週刊
在顧,肚
端炡肛最
晚上上比鐘明
肥肚,最明顯的不同特性,香港她不是低產區
有逃,较上顯
遊湛之强,耐寒力自然
不管在何季節裡,只要 致售價低路,分手的供 中國的產種最感興趣。雖然此烏在生活上 健康已困擾,有健康的 「魚成熟,使可以進行產摭 不過,在等國,有經驗的同情,在多在硫矮的樹林裡或草木來做之前,新岛的 上,亦不因供量多而引 來自各地的供玼上,對上活動, 做别雌雄又有何難。一方八面,包括中國南端 量仍源执不断的,不過覓食的,多作低飛,並營養的饲料,務求在冬 狀,單憑上述兩點,娶度等地,供風雖來自四 盘最多,但在不日,供生活上,甚少飛翔,在主食,初期更宣添設富 《民在末端上,是呈扇個 來自泰、緬、印尼、印雖然仍以每年的秋季供便,故此,媯羣在每日是以榮、拜,果粒碎侣 比象,是比較細小,而初秋,就有不少供徒,區各地,常年都有售,負荷,在飛翔時大感不 _鑠,在肛餓上,雌油的,但却是個聚地,每年由有增强。 “在培養上,此為亦
: 廼照裙,只待
水温保持適當,就有成
。對在海供
是帶量
亞的中區其雖的
楊主旻園期五七五第
培庸各度云。準
長要的值本供但中
不是平庸,烏本身也有培養,便要小心,能保
一定的培養價值的。溫最好,經過一年之後
·亞熱帶區的長尾禾,紅島對新的生活環境
『區有地
圈可靠的。 ... 影不住的,就會半途更新
攤區別,準確性實在不大 女生活環境,自然抵當
「量,除了成熟的大局之才有供量,新局向木樹
地的供域,多在秋後之下,周本身習慣在温暖 若來自亞熱帶國各 慣,冬日來臨,冷流南
五 有供放,但單烈此法法的隈境下生活,一旦改
「外,還有雛寫低患。新的環境認識,仍習
外联色
「妾者的季節裡就脊供各地的新岛- 由於秋日