(25)
育教
日八廿月九年未辛潛
1992 中學會考預習專欄
明德出版社
MILL & DALE PRESS
Physics (5)
C. Y. Mak
Exercise 5 Temperature and thermometer 1. A. mercury-in-glass thermometer
is
cal1brated by immersing in turn in. melting 'ice and boiling water and the Jengths of the mercury thread are 4.2 cm and 19.2 cm.
(a) What is the temperature when the thread is 8.7 cm long?.
(b).ihat is the length of the mercury thread if the temperature is -20°C?
2. A
rotary thermometer measures temperatures in the range of -25°C to 50°C and the painter. makes.a. deflection of 150° over. this range as shown in figure/1. If, now the painter shows a deflection of 30°. (See figure 2) from the reading of -25°C, find the corresponding
temperature.
3. A
Figure 1
Figure 2
thermocouple thermometer was calibrated by immersing the cold junction in melting ice at 0°C and keeping the hot junction at various. temperatures as shown in figure 3.
micro-pater
mixture of Ice)
̇hot water
and water.
Figure 3
The table below shows how: the current flowing ·through. the thermocouple.changed with the temperature of the hot junction.
Temperature/°C 0° 15 30. 45 60 75. 90
Current/#A 0 22.5 39.5 52 .60.5 66 70
報日僑半
(a) Draw a graph of current against (b) The, length of the thread temperature.
(b) What is the temperature of the
hot Junction f the current
30 MA.
(c) What is
4.2 (0.15)(20)
1.2 cm (ARs.)
is
2:
Let the temperature be 0°C.
the ·current in the thermocouple if you hold the hot. junction tightly with your hand (Assuming that your body:temperature is 37°C).
4. A faulty thermometer reads -15°C at the temperature of melting ice and 105°C at the temperature of boiling water under standard pressure. (a) Find the true temperature when the thermometer reads 39°C% (b) What is the reading given by the thermometer. when
true temperature is :-10°C,
the
(c) At what temperature does the thermometer give a correct reading?
Solutions to Exercise 5.
1.
(a) The increase In Tength of mercury
thread for each. 呢 interval
=
19.2 cm- 4.2 cm
=0.15cm
The temperature
8.74.2
0.15
# 30°C
(Ans.).
Angie rotated peroc
=
150° 50-1-257 = 2°
The won to
unding temperature
-25
= -10°C
3. (a)
60
50
40
30-
(Ans)
3340 65
一期星 日四月一十( 一九九一)年十八國民華中
(b):From the graph, the temperature is
21.5°C.
(c). From the graph, the current is
45 μA.
4.
(a) Increase in reading of the faulty
thermometer per °C.
105-(-15)
日八廿月九年未
康
100
= 1.2°C
When the thermometer reads 40°C,
the true temperature is
39-(-15)
老加入
行
康泰馬 泰 人數又再倍
* 1.2′′
-- 45°C
(Ans:)
(b) When the true temperature is -10°C,
the reading. of
thermometer will be
(-15). 1.2:
the
程編排是妥
使團友可觀
faulty
並減少於楼
全港獨
1分社直營,
(-15)+(-10)(1.2)
* -27°C
(Ans.)
(c) Let the temperature be 0°C.
Hence
-.0
9 75
the temperature is. 75°C.
11. had stolen:
12. had sold.
13. had been locking.
14. did not find.
15. went
僅康樂設有料 全部操流利
2全新自
3獨家住宿新力 獨家住宿吉隆
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(香港廟的主
「星期一至五辦公時間
題社:上環地ㄨ站!
銅鑼灣:松坂量18字
1992 中學會考預習專欄
明德出版社:
MILL & DALE PRESS
English Language
TENSES (1)
for women : their activities (33) (confine) to their homes, since it (34)]} (regard) as: Indecent for women tal
However, public so often. appear in
women (35)
{stand) .on
almost the same footing with men.
I (10)
paper that a boy (11) watch and (12) police (13).
(read) in yesterday's (steal) a (sell) it. The (look) for him
everywhere but (14)
him.
(not find}
today
When we (15).
(go)
last night, they.(15)
cards. They (17) they. (18)
They
to see theri |
(play)
(say) that {play) since morning.
Hu
Jane: "We (19)' (wait) here for (half an hour now, So I (20) (not think) she will come.
She always (21)
late, or (22) you
something (23)
(arrive) (think) (happen) to
her?"
(Tend)
Mary
!1 (24) (25)
(wait) Jong enough.!
Write down the correct form of the word given in brackets.
1. I had checked the door before. I
(leave);
2. Up till now, he never
me anything.
3. Here
(come) our. idol,
4. By the end of next week, the final.
examination
(finish).
5. Don't disturb hima
(revise) his books now.
(not know) but I (think): we (26)
(not
In the past, women (27) treat) fairly in many ways. A man ̇often (28)
(treat) his wife not
Liberal education ·(36) (spread) all over the world. Much work (37) (dd) to 'seek better teaching methods.
Students (38) (encourage) to participate in lessons
·which often (39)
(hold)in the form of group discussions. They. (40) (guide) in the application of the knowledge learnt. Severe punishment no Jonger (41)
{axist} even 17 students.
(misbehave)
themselves.
(42)
When you (43) (plan):for your retirement, you must remember these inescapable economic realities however, and over what period, you【44】
(gather) together your investment. nest-egg, the income you draw · (45) (not come) from the past in fact; the income you (46);
(receive),by. (come) from whatever means, (47) current output at that very moment;
【age) world populations. (48) that is, more and more. old people (49) (form) a greater and greater
support this group (50)
too.
(grow).
10. read
Diabetes (51)
(be) once a kj11ér disease. If you (52). (develop) it, you had little chance of living more than a few years, and chitdren rarely
(survive) twelve months. Now, For most of the disease sufferers, the can be overcome by a daily injection arid by carefully eating the right food. Diabetes (54) (be) the result of
a failure of the body to metabolize
The body (55) sugar
(need) sugar to provide energy. · Sugar (56) {convert) into a form which the
body can use. Diabetes (cause) when the body (58)
(57) the
(fail)
to produce enough insulin to use up the sugar, n diabetic person (59) (accumulate) too much sugar in the. blood, and this (60) (excrete) from the body in urine.
Answers
1. left
2. has never '}ent
3. comes
4. will have finished
This school (6))
to me.
[ (7)
over
ten
years
·(8)
(be) familiar
(teach) here for
I
as a partner, but as a maid. Daughters (29) ao (be) not Important. they could even
and. be bought
sold.
Education (30)
(deny) to women, (consider}: a for It (31)
proportion of the total populations.. The output necessary each day.
to
9. retire
(continue) teaching here until 1 (9) privilege, To some countries, there
(32)
(be) only limited. freedom (retire).
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16. were playing
17. said
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20. do not think.
21. arrives
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