育收僑室
第三第張四
日二初月三年午丙夏难
WAH KIU YAT PO
英中会題試題預習專櫃
VOLUME
物理科
ㄖ)
陸永熾·
By Mr. Luk Wing Chee,
Temperature,
°C
15
43
63
100
Vol.(in length) cm.
7.2
7.9
3.4
9.3
VOLUME-TEHP._GRAPH
(7·9,43)
(9.3,100),
Intensity of illumination at BC
-
30
R
67.5 lumens/ sq.ft.)
Area of lens BC -
2
我
'Lient energy Zalling on the lens per secondi
e intensity x area.
067.5 x
- 1.472 lumens
[(b) Since A DBC and ▲ DEF are similar triangles
Intensity of illumination at proportional to the area
Lunursely.
2
Intensity of illumination at EF- Intensity of illumination at BC
2
Intensity of illumination at EF
67.5 *
L
日三十月三年六六九一周公牢五十五國民革中
全深
六百青年參加假大會堂舉行
|深水埔街坊會主辦
全港青年書畫比賽
寒期爲四月九日十日十一日
敦請麥道軻華民司頒發獎品
賽
网際社深水埗街坊福利會爲提供 九 國序及藍斯青年多參加課外有益身心活動 衆,現將寳期增郊一天,即爲四月九日, 比實日期定爲两天,因參加人數過
年,臂意義,俱大力支持,參加者世恩。在后” 一和九新界十縠以下曾牛精醫比,十一日,分三天仍假大音常演講廳 六、质,岛上摩府暨學生家長,以此年富動,舉行,并已編列比賽秩序印發通告,茲錄
地點。香澄大會堂。 |
老須向淳。 →2斗方面幣高十二吋,十六时,參加 怡、黃妙。附則:大會供贵翊鮨(宣 撰件戇、黃卓族、花形奇、林詩辮、奥 藥、陳啓明、明、辦公、黎全、 一、 魔萍、孫起降、绵,五子彬,會建 華、段,楊鵡、與相棠、粥 、會秀畫、阿銀淋、測芒苏,陳妙方,黃 薏區燒、阿錦英、英突、梁宏衆 高勁麟,霍士銘、雲士、陈美麗 陳 情、林婀娜、楊華、馬德、李翰賽 潮紅、陳鴻華、北亭、奥文號、貢镪艺 *長、張瓊、容忠、安萸 菠 聲,曹偉文、高正部、志藐 日製——(下午二時半至四正心
四月十日(星期日):西洋畫,比賽
甘中,□育女中、寶血女中,英皇阱院、 金文奈,伊利沙白,巴富街中學、仿
參加學校六十單位,計何東女子職藥 月、學校-聖心女中+U瑪利女中、型士提反女 點;李逵大會弦。 、東華三院、橞明、總明夜中、樂善堂、、無金池、馮燈棻、李日晶、方汝辦、關 「林、救恩、拔萃、谆雅、湖商、潮州、邳 林、黃劍輝、梁受嚴、郭孟浩、李燕俄、 日直營、培英、大同、銀編中學、九龍工萊維杜德戤、潘茶,隨經緯、蔡志良、黃崖交 | 勵,君彥大會堂。
·A組——八下午一時至二時半)毀岳 ・四月九日(星期六);赖燈,比賽雅 | 十一時至下午一种形。六會供矜洋瓶〔面 積爲百磅紙一張叫)參加者須自 A祖上午十時至十一時半,B祖上午
智伤
月十一日(县期一)憲法,比賽
期
詩歌舞街官立、方氏英暮、 浸信學院、愛德義:聖方濟各、南華、 、聖伯烈、邱吉爾、威盛頓·穆仁夜校 義美大、縣大、瑪利塔、燃習 伯南、東方德森、何錦瑜、李飲和、潘朵生、李淑著 佛敎源类 及其他街坊青年,人數傳承六
一百名。
潼新村中學、柏雨,香江、教文丶振箕、
·新中學、新法書院、習類斯、烏溪沙兒 西南、八遼、煞仁、培正、譙英、南沙、、林慶逸、黃秉遜、黃华迈、何繈江、
· 方案,陳定中,敢爆成,何懼輝,寒證添 -江攡明、吳貴榮、范世京、司徒都 【粉蛋,美、鍋經、古國米、張德華、 、蔡明群、黎俊、滾寧,焉有, 、振森、陳楚坤、李玉滿、林嘉、李 國兒,伍兆勳、林俊生、螨榮、陳鑵 白運、西塘妹,余裕貞、李金燕、劉志,欺八十八人,B組,上午十點半至十二時, 丁方三寸 · 豪斯老須自備这照。 時至下午一時半,加人數八十七人,大 正,參加人數A十七人,C組,正午十二 A組7上九時;十時半,參加入
我戾司娶美阿知,於術快樂即席揮书式 列,以此惑育可賓歌賞。
·卷,附同其本人作品,於鼓楼堂 假大會堂欧禳餐點行頒獎典體, | 又該會冋定四月十七日下午五時,
.9 Lumens pe
a) Light energy falling on the Lane per laadd
18 2.472 lumens .
(b) Intensity of illumination on the screen is
251.9 Lumens per eq.ft,
(a)
Intensity of the first lamp. I
= 16 c.D.
50. TEMPERATURE.
The volume-temperature graph is a straight The volume of air at o°C. is 6.81 cm.
Let be the cubical expansion of air
€100
Vo
·
vol. of air at ico°C.
0°c.
vol. of air at 0
- Vo (1 + α x 100)
Intensity of illumination due to I¡¡Ë,
Intensity of the second
·
12
• 25 c.p.
cm.
-
candle
602
11) Let be the incident
angle and A be the angle between the two mirrors. A ABEC are condyalia
anzle FBC = angle A
。
· 90
em. - candle
1202
and angle A
•°• x
90
11/602 12/1202
16 x 120x120
• 90
25 x 60 x
60
A
10
450
弘
25
V100
V100 - Ve
x
Vo x 100
249
681
273.3
- (b)
HONGKON
Ans - The coef. of cubical expansion of air
at constant pressure is 1 per oc.
273.5
be the mass of bullet in ga.
2.1
Let
L. be the latent heat of
Swap. boat of lead " u.us.
Lea a
temp... rise
-
(327 - 12)°C
If both sides are equally illuminated,
and let x be the distance apart of the first lamp
Ene
screen
25 (180-x)
Taking the square root of both sides.
iii)
The angle between the mirrors must be (45°-2)
As shown in figure,
the angle between mirrors must be equal to that of the incident angle
LIBRARI
Heat given out = mk @xsx (t.
• m (5. + 0.03 x 315) cal..
Assuming u be the velocity of bullet
kinetic energy of bullet before hitting the target
2
TEL
2
-
ergs
·
2 x 10
2
x
5x
•
4 x 180 - 4x
9x
4 x 180
*
• 80
Aris. (a) The ratio of their intensity of illumination
on the screen is 64 to 25.
ཐཱ
(b) To have equal illumination on both sides of
the screen the 16 c.p. lamp must be placed 80 cm, from it..
• Heat given out
m(5 +0.03 x 315 ) x 4.2 x 10
2(59,45) x 42 x 10.
10?
2 x 1.345 x 4.2 x 108
1) Ilabeam of light
insidents normally on a plane mirror it is reflected back along
its own path. (deviated through
130°
- 1.345 x 8.4 ̈ ̄x 10"
1.345 x 6.4.
7777
「OUESPIJNS (13)
1. State the relation between the object distance (u) and the
image distance (v) for rays reflected from a concave mirror The following are specimen results obtained with a given concave mirrors
45.0 50.0
22.5 21.4
u(cm) 20.0
v (cn.)
60.0 37.3
30.1
25.0 30.0 35.0 40.0
24.2
26.2
Show how these observations confirm your statement of the first paragraph and, by plotting 1 against 1, optain a value for the
focal lengun of the mirror.
2. The image of an object placed in front of a concave mirror
is one-third of the size of the object and is 30 en. from the object. What is the focal length of the mirror?
1. The refractive index from air to water is 4/3-and-from-air-to-
zlass is 1.5. Find the refractive index from glass to water.
心
The diagram, shows a ray of light entering one fuge of a glass
By geometric& block, of dimensions given, at an angle of 40. construction, trace the path of the ray through the block and its path on energence through the block, Meagure the angle of amergence and the lateral displacement undergone by the ray after passing through the block.
-x-107
[Velocity of bullet is 3.36 x 10","sec
11) | If two mirrors are at
right angle to each other, after two reflections, the Aneident ray will be deviated 180°
(D)
•
•
20% 28- 180
Refractive indey
1.5
12 km..
1) The mirrors should either, be" parallel
perpendicular to each other.
A convex lens is used to throw a sharp image of a lamp on to wall distant 8 ft. from the lamp. On moving the Lens & ft. "towards the wall another shape image of the、lamp.can ba
formed on the wall. What is the focal length of the lens?.
Page 15Page 16
其四第课甲第
日二初月三年午丙麼梦
WAR KIYAT PO