1970-03-14 — Page 25

GEOGRAPHY (19)

真二第張七第日七初月二年戌庚歷夏 WAH KIU YAT PO

郭日僑華

六期星日四十月三年〇七九一曆公年九十五國民華中 育教華

僑

會考試題預習專褓LECO共文中學會考試題預習專欄

華路道英文書院生編※

物理科 (十九)

鄧炳恩

地理科

(十九)

中學入學試試題預習專欄

工弦及空氯松之振動問答計算題解 1.解設鋼線最初之張力為T在新情況下之跟 力為则在此两情況下之基昔频率分别

數學科

復

智慧出版社主編

(十九) 數

=

(一)我們計算各黨實西時,心須定,一個數量作恩幣,這叫做單位。只用一個單位表示出来 的歡置,叫做單名數,例如4元。用两周以上的頭位表示出來數量,做得名歌,例如37尺54 。義名數有十進和非十進濕。十進夜名數的海亭相同,計算很便利。非十進譲名廠的孕不是士 邊的一對算比較困村。

宝二》復名轍凡由在單位化爲單位時,叫做化法,化法用郵去城。複名歡凡由單位化 「為單位時,叫做聚•享用進去袋。两笑不同的名殿,不能指翊咸相獎。芮個包準數相躁

里、長度單位:

12-102 12-10+: 3吋~30分

10-89

(1) *

---15-150

151-10

(2)英野牛

1-17601-15280

10-35 16-12

(3) ......

1公里~10分)公司~10公 1公丈-10公尺,1公尺-10公寸 乙、重量單位

21

18-1005

(2)英网部

(3)

1160

1-20221015.

1啦一1000公斤

丙、容量單位

18-103

10-10

1 特路112巷 1-16

2016-104 14-1041–10

(2) 英國制

1协金4旁验·

(3)萬國制

1夺除 2品路

1公聞~10公路

1-10

1公石-10公斗1公平~10公升I公司~10公合公合一10公句

(四)貨們是計算貨品質格的引導出是交易的媒介。香港环类用元能基本變位,但英國則用; 整合集本單位。地球太陽一周能叫一年,一年分12個月,月大31日,月小30日,但2月在平 年有28日 在滿年有29日。在計算時,只說月字時,還常每月期作30日計算。

申、貨幣單位:

(##

(2)

1元~10色:

-1$-204

乙兩間單位

1-109

1先令 12億土

1年-365日(潤年365日)

19-60

···七八十二月有31日

19-24

四、各月有30日,2月有28日(潤年有29日)

(五)各關單位的換算是當量的換算,下面是本者常用的當數推算

甲,是配單位換算當量

17-0.87-8

1

1尺一公尺

10-1680F

15-0.527

1升10.22加龠

丁、貨幣單位換算當量、

1-14.45%

10-284

.1

*100-4:546

1关元 6,06巷冗

3

《六)將裡名廠化需單名數的題目,最為常見,可分爲以分數作密或以小數作客两類。劉算出 來的專案必須符合

白糖

肉麵(3)

《解注)

·北59359时爲碼的分數

$69吋199億十9吋+36吋

136-1/]> +36 +3690.5

=1:00小時)

一加侖

1+0.01/\#§

20

86

86102

240元始

1815-

6601

W原重一浮力 2.7V9-0.5x1Vg

2.7vg.

=W=T

27-05 27

-0-815

W=T

· ƒ=f, I = 300x √0-815 = 270 (24/44) £= 解法振動之頻率與弦工長度成反比與 之

張力平方

與弦之線密度(单位長 王重劃平方根成反比酵指振弦定律 没十岁鋼絲之墓音频李土与第二泛音之 頭則

(汐钱》

f=3x+

200

√(0.02/1)

X50 =150 (2/4)

3.解頻率相近面不相等之两波同向傳播時因 干涉而生忽高忽低之声音,称酱拍音, 使用管之頻年舀于测

† = 25618 = 264 (2/54)

開管之波長=一 關管之長

34.000

= 128.8 (玉米) 264 = 支x128.8= 64.4(玉米) 若舆昔义去鸣之開管之波長為人 X = 34.000/256 6=132.8 (玉米) 與吉义夫鳴三間管長為見,

1 == × 13218 = (6·4 (3*)

故閉管須加長 6604-64.4=2厘米)

4.()若為間管则其基音频率為f=v/28

= 331 +0.6×15 = 340 (8/8))

+=340/2x0.5 = 340 (K/M)

- £ ¥ 5 = 2×340 = 680 (2/4)) 泛音+= 3X340=1020 (次/m)

(b)若怒開管,則基音频率与+=V/4L:

340/4x0.5 = 170 (2/4) 冷 =3x170

- 510 (-2/49) 二冷費$=5×170=

850 (*/*)

丁光度學與光之反射埋光器 標準燭與紙層相距一呎於另一边距紙箱

上以9呎燭光之電灯照之,則紙等两边

標準燭與煤油灯相距6呎若煤油灯易4 蠋光欲纸屏对两者得相等之照皮则衹屏须 放於上

煤氣灯,每小時用爆氣3立方

灯於40小時用宽工度则两者價

電幻與紙屏間距離為85至米時,则得某照度 竅放一玻璃於紙屏與電灯之間則將電灯向 纸骨转近5厘米後始得相同照度, 則玻璃 阻式光之百分率5.

5照度與光源距離之平方成

比定律

2其和光線之入射角

定律 一点光源S設在此 P之照度為120流明

處

平方

被照

上照度之大

上才

光源

(4):

吉3斤-4磅,則86宝570斤,其終的思楚海!

【米,則在桌面上距P点4 度酱

(解法》

344,01斤一一岁,

37F-x57-76777

棘

4.

3

故此两者相签:86-769–10機

習

出正確用鉛確在

B8斤! 2010.8斤 D100 斤

1.18斤编

B

ARCDE

1. □□□□

933059A

B2 35分 30砂

03-30钟

(未完鶫人第七三角!

A 25-30 £3#3530

ABCDE

□□□□□

人高5呎10吋欲見全身之像則最短直立 之平面鏡須高

8.两平面镜失成 60°之市其間置一洋燭则所成

之像 為

物体

面鏡前3呎處其像些於鏡前1 焦距為

10.10)實物與凸面镜之距離恰等於比饞之焦距

則所成

馬子之凸面鏡所得之像之大小 實物之1/几借則實物與凸面鏡之距離為一

Examine the merits and demerite of air, cosan and land transport.

The autput of all human antivities and the consumption of that output are in large part made ponsibly by large scale efficient transportation and communication. Economic activity and the.

development of transportation facilities go hand in hand. The cost of moving goods by varioua typer of transportation differs greatly,

Land transport can be divided into railway. transport and road transport. Both of them provide wodern device of land haulage over short and long distances. In the case of rail transport, it can Barry bulky goods for long distance overland, Road transport is more flexible than rail transport and it provides the most important meane of intra-urban traffic. However in both rail and road transport, they suffered from relief barriers such as rivers, rapide, waterfalls, rugged mountains and ridges. Moreover, land transport iá slower than air transport but more expensive than) ocean transport. Land transport is usually used to transport bulky or heavy commodities over land. Kost of the passenger traffic which was formerly carried by land transport is now taken over by sir transport.

Ocean transport is the cheapest of all forme. of transport when durable commodities are carried over long distance. This is especially true of

open seas and rivers where no maintenance is.

required. Transportation by canals is more

expensive but still it is cheaper than air or lan transport. The drawbacks of ocean transport. include, the slow rate of movement and it is affected by climate (in winter the inland laken) and rivers are frozen)

Air transport does not depend so much on surface donditions as in the case of ocean or lan transport. However, , air transport has not yet reached to a stage when all physical difficulties have been aurmounted; large stretches of ocean.. mountainous terrains where cloud, poor visibility. extensive forest areas, swamps and lakes still exercise some control over the choice of air transport routes and airports. The most important? factor which governs the choice of air transport is of course the economic factor; the cost of air) transport is atill very high when compare with: gther mode of transport,

The development of air, transport in the last thirty years has been very rapid. Aeroplanes. have become much larger and faster. In the near future. the American and Anglo-French Supersonia) jets would carry more than 300 passengere at: speed of more than 1,000 knots. Therefore, transport by air is having a distinct advantage over other forms of transport in the carrying of mail, passengers and commercial products in which

of utmost importance. the tina factor

Give a concise comparison between the Panama and the Suez Canal.

The Suez Canal shows a remarkable increase in traffic after the Second World War due mainly to the growing dependence of Western Europe on petroleum. from the Persian: Gulf. The Canal: js now of. far greater importance than ever before, three- fifths of the traffic consisting of oil-tankers of various nations. The Canal was nationalised by Egypt in 1956; used by approximately 20,300 vessels annually of which some 3,700 are British.] The Canal has no locke,

The Panama Canal is of great importance to the internal trade of the U.S.A., the route from Great Britain to New Zealand is slightly shorter via Panans than via Suez. The routes from New fork to all Far Eastern ports north.of Hong Kong. as well as to New Zealand and Australia are also aharter via Panama, Recently, there are plana: for building another canal, near the existing one but wider and more up-to-date, to cope with the increasing traffic.

Short comparison between the Suez and Panama Canal:-

The Sues nas open up a new ses route between Europe and the East; the Panana has started a whole series of new trade routes and it has encouraged greatly trans-Pacific trade. Thus the Suez is particularly important to Britain. and North-Western Europe and the Fanana to U.S.A.

·From England to New Zealand is shortec via tho Panama) England to Australia im shorter via the Suez. There are mora countries and porta of call along the Suez route, and so there to of trade.

3. The ports of North-Western Europe is still

nearer to East Asian ports, via the Suez than the Panama. So that the Suez is not affaoted by the opening of the Panama Canal.

4. The Panama aled shortens the route from the eastern part of North America to Australia.

QUESTIONS FOR NEXT WEEK

A)(1) Write a geographical account on lumbering

the North Pacific Coast Region.

(ii) What is the major problem in the worldg.

lumbering industry?

(iii) Suggest methode for forest and timber

conservation.

b)(i) Show, by means of a sketch mapy the main

Trans-Atlantic shipping routes.

(11) Comment briefly on the general pattern anu the importance of one of the Trans-Pacific Routes .

Page 25Page 26

14 MAR 1970