1970-05-29 — Page 26

華僑日報 All

頁二第張七第日五廿月四年戌庚廳宴 WAH KIU YAT PO

英中會考數學A(二)答案

·堅道英文書院撰答·

Suggested Answer

of

H.K. Certificate of Education Examination (Engliah)

Mathematics II.

population of 20 years ago. present population

(2+100) 4

767,000 P

報日僑華

五期星日九廿月五年〇七九一屡公年九十五國民華中育教僑華

Let the need of the aeroplane be Sm.p.h MN 500125°271 + Scot36035

5(2.1013+ 1.3473) 17.243.18

17.243 x 60 sip.h

517.29 m.P.H.

文中學會考試題預習專欄

物理科(三十)

鄧炳恩!!

0.電流之各種效应填-

題題解

1.發電机之功率為18-6.馬力

解設發電机之功率為P则

120X150X 100 X 726 18-6 (60)

所用之全電流為5.1安培每時電費為0.31元 解設所用之全電流為工則

The actual increase or the population in

20 years - 767,000 - 563,900

203,100

The ratio of profit distributed among Aj should be

$2,500 ≈ 12 $(3000 x 1 + 2000 x 5) $(1500 83500 x 4)

30 31 26

The profit of Im $5,

The profit of Y

$5,568

18.7-20]cl

formula

I = 14 × 40 X 20

220 設期時電費為H

M

14x40x20

0.28 -0.314 (0)

=14.4 (2)

2000 X10:

sin46°41'

sin86 38

0.9982a = 0.7276(40.7

4532 0.7276 x 48.1

2a)

此阻绿之電阻為14.4歐姆

H = 0.24 I'R λ = 0.24

R = 024 x (100) x 60 x

4.需時14分50秒

14.44 cm

#

m = Z It

14.44 cm.

The profit of 2 - $5,568 x 89

44

解電

can do a piece of work in

$300 $15

BO

D can do the same piece of work in

30 day

or 20 days

$270

In 1 day 6 can do 20 of the work

In 1 day B can do

In 1 day A. B can do 20 30 o

DÍ TAG HOEK.

A + Boan complete the work together in 12 days."

oan ze ceive - $15 x 12 - $184

Boan receive – $9 x 125 $108

(b) Let A has to pay for the article

2507

In A ADL, since:

AD = "DL

250 metres

B. has to pay

has to pay $100 I

120 100

110

P for the artion 100

110

•P for the ar

110

* 100

120. 100

320

25000165

250 x

B has to pay = $1100

has so pay:

$1320

Profit for A1100

2000

$1000

Profit for B $1320 $1100 $220

3(a) Let a complete solid spheres can be made

8

By cosine formula.

ADE

+ BD 2. AD+BD

2502+116.682

0.8746

25120

158.5 metrea

Bein I+

2006 2

8 - 8000 x + 20

(3coax: + 1)(2cos

Ir 200sx

+ COBI

-COBI

7 (1)3 -

COBI =

45. I

or 300

45.complete solid spneres can pe.

If 30òux

(b) (1) Q = 1.100 gallons/man

1,100

t

6.25 x 60

(The Cross Sectional area of the pipe

Since

Section B

3-6-328-5.38 ft./sec

Quantity of water pumped out in lé days

1100 x 60 x 36

Wt. of mud în dire

1100 x 60

594001b.

250 116.683

1092

3333

n°32

300°, 109°289

250

gee of ciroze

157 inores

152

6"

(1) Sinos arc

RO

6x14 22

110

2.4 radians

ii) Area or the sector MON

51秒)

I

0.0011183 X/

電池内所折出銅之總量為95-1-

及物溶 解 總量為97.5克

解電

所析出之銅量即為銅電量計内所析 量為1.7克故三電池内所析出铜上 $3317=951 @

由法拉第第二電解足律三電池内所容解之 熊锌量為:951x65

63.4

=97.5 (0)

6.17 ± 103 3 § § 39.05

解設钾之化學畲量為C,由法拉第第二電解題

#f; c = 108 ×

(0.081/2)

0.11.2

-39.05

7.此正切電流計三常数为0.0261

I we tan o

Za tu s

b. I = ke lane & I = z t

0.1052

0.001118x:60X 60 X Z02:45.

8析出之銅量為0.1838克

tame = (2#NI) / 10TH Ã m=zIt

· m -0.0003295 x 10X15X0.18x ten to

=0-1838 (2)

20 X/2

•=0.0261

(RO) = 243 $ $ 0.00032.95 F/MK)

q中心所生之磁场强度為0.7068奥斯特磁針

之偏向角為39.

鲜設中心所生之磁壤强度為H.

ZT X 380.85

two = H/He

-39°1

10 x 15

(奥斯特)

0.6281

10.雷地地磁水平强度为0.18奥斯特

25X 10×0.5157 = 0.18(@$#

10X20 X0.900

總複習問答計算題

一弹簧秤懸掛於一升降機内秤称一質量為 物体营升降机吠加速度又下降時設秤 之讀数苎w!試能ww = m (g-a),其中 g 乌重 加速度:W為該物体之視重、m4岁芙真實至

升降机乘客之视重較其臭買重重越出古人 上或少於女以上時乘客即威不適某建築物 没有一升降机擬在不引起乘客不適之情況 下將乘客於烬可能 最短時間內由1000 之之高處直載 地面試計算此最短時間 已有一个在一热绝缘良好之箱通过箱中盛有

吃之冰及水当100°C 蒸汽吠:每

等速由管之一端進入管中時管三

之水流出面箱中三冰目而以每分鐘 仟克之率熔解若饮用90°C之水面不用蒸汽

以每分鐘以-

之等速輸入管中則自管 他端流出之水工温湿度為2.5°C,試求此時箱 中之冰之熔解率

試解釋光之折射现象。

相同凸透鏡筚路吝為重米相距46 重米组成一双透镜 今有一小物置於A镜

試求出該小物最後成像之性 求其放大率

闅管與一音义同振動時相差為8拍/秒;面 調較低若普义之频率為256次/秒。 速為340精秒,且管 正量署去不計則

B两带霓金属球半径分别為

及分離

(未完轉入第七張第三肖)

Comments

Approved members can add comments, bookmarks, and private notes.

No comments yet.

Private Research Note

Private notes are available after approval.