... as shown in Fig. 1. 18. Find T
2
.
1. 15 Four infinite, parallel, black, opaque plates transfer heat by
radiation, as shown in Fig. 1. 19. Find T
2
and T
3
.[T
2
= 75. 53
◦
C.]
1. 16 Two large, black, ... T(x = 0) = T
1
and T(x = L) = T
2
are the b.c.s
Step 5. T
1
= 0 + C
2
, so C
2
= T
1
; and T
2
= C
1
L + C
2
, so C
1
=
T
2
−T
1
L
Step 6. T = T
1
+
T
2
−T
1
L
x;or
T − T
1
T
2
−T
1
=
x
L
Step ... any additional assumptions.)
1 .32 How much entropy does the light bulb in Problem 1 . 31 pro-
duce?
1 .33 Air at 20
◦
C flows over one side of a thin metal sheet (h = 10 .6
W/m
2
K). Methanol at 87
◦
C...
... writing d. wrote
32 . a. I b. me c. my d. mine
33 . a. looking b. like c. seen d. similar
34 . a. slightly b. hardly c. scarcely d. reasonably
35 . a. aspects b. points c. features d. marks
36 . a. feels ... curious to know what she is (33 ) ______.
Well, Lisa is of our age - 17 - and not very tall or slim. In fact, she has (34 ) ______ rounded shoulders and
a plump face. The best (35 ) ______ on Lisa's ... She
(36 ) ______ lively with her hair cut short and dressed in (37 ) ______ clothes - jeans and a T-shirt. When I first
met her at my cousin's birthday party, I was attracted by her (38 ) ______...
... Trung tâm phơng đông - ĐT: 04. 7548 035
TEST FOR UNIT1
I. PRONUNCIATION
A. Choose the word that has the underlined (letters) pronounced differently from the others.
1. a. scream b. death c. ready ... didn't know about the change of plan.
3. Nigel felt sick from eating too many cakes. Nigel felt sick because _____________
Trung tâm phơng đông - ĐT: 04. 7548 035
3. Maria is going to stop dinner, ... I have d. get normally up/ I sometimes have
11 . The house was very quiet when I got home. Everybody to bed.
a. have gone b. went c. had gone d. goes
12 . It was the most experience of my life.
a....
... QUYNH NHU
UNIT 1
HOME LIFE
TEST 1
I. PRONUNCIATION
Choose the word that has the underlined part pronounced differently from that of the others.
1. a. family b. parents c. happy ... Come and see me when you _______________your report.
1
a. 1 /3 percent of households b. 20 percent of households
c. 7 percent of households d. 3 percent of households
55. Who generally constitutes ... supports c. supporters d. supportive
12 .
My mother often cooks big meals, so we have_____________for days.
a. remainders b. surplus c. leftovers d. dishes
13 .
His secretary was formidably ______________:...
... petrol .
A B C D
13 . Lan used to go to the cinema in Sunday evening .
A B C D
14 . Oxygen plays an important role in maintaining live .
A B C D
15 . Few airports in the United States are ... d. on
12 . She was born _____________ September 15
th
. a. in b. at c. on since
13 . The children are playing ____________ in the school yard . a. happiness b. happy c. happily d.
happier
14 . ... kept in touch D. lost contact
10 . The United States has a(n) _______________________of around 250 million.
A. population B. addition C. instruction D. territory
11 . If you have any trouble , ask...
... last vacation.
12 . I often (leave) __________ the city at weekends.
13 . The sun (set)___________ in the west.
14 . My friend (study) __________ English for an hour every night.
15 . Honesty (be) ... (see) __________ him 3 weeks ago.
8. It (be) __________ very cold now.
9. I (need) ____________ some money for my textbooks.
10 . Tom (like) __________ to go to the museums.
11 . He (read) __________ ... __________ the best policy.
16 . The earth (move) __________ round the sun.
17 . Two and two (make) __________ four.
18 . We (watch) __________ a good programme on TV last night.
19 . Mary (love) __________...
...
13 2
Usingwhich
13 3
Usingwhose
13 5
Usinghow
13 8
Usinghowofin
13 9
Usinghowjkr
14 0
Length of time: it
+
ta&e and how long
14 1
More questions
with
how
1 43
Using ... adjectives
16 8
6 -10
Personal pronouns: subjects and objects
17 1
6 -1 1
Possessive nouns
1 73
6- 12
Possessive pronouns and adjectives
17 6
6- 13
Reflexivepmnouns
17 8
6 -14
Singular ...
the other
18 1
6 -15
Plural forms of other: other(s) vs
.
the
other(s)
1 83
6 -16
Summary of forms of other
.
.
18 6
Vlll
CONTENTS
Chapter
7
MODAL AUXILIARIES
7 -1
The form...
... TOEFL
iBT practice tests on your computer, click on the
choices labeled TOEFL iBT Practice Test1 or
TOEFL iBT Practice Test 2.
b
If you want to work through the Practice Sets and
Practice Tests in the ... Order.
Taking TOEFL iBT Practice Tests on Your Computer
On the Navigation screen, choose either TOEFL iBT Practice Test1 or TOEFL iBT Practice Test 2. Then click
on the test section you wish to take: ... Passage 1, 2, or 3.
Contents
1 Introducing the TOEFL
đ
iBT 1
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
How to...
... side to the other if
D
12
is 2.84 10
5
m
2
/s and = 1. 18 kg/m
3
?
Solution.
j
water vapor
= 1. 18
kg
m
3
2.84 10
5
m
2
s
0. 01 kg H
2
O/kg mixture
1m
= 3. 35 10
7
kg
m
2
Ãs
Contact ... =
c
p
V
h
e
A
=
(2000)(700)(0. 010 )(0.0 036 )
2
/4
(18 .44) (1 .33 ì 10
4
)
= 58.1s
From eqn. (1. 22) with T
0
= 72 .3
◦
C
T
resistor
= 35 .0 + (72 .3 − 35 .0)e
−t/58 .1 ◦
C
Ninety-five percent of the total ... resistance is
R
t
equiv
=
1
(1 .33 ì 10
−4
)( 13 + 6.44)
= 38 6.8 K/W
Since
Q =
T
resistor
−T
air
R
t
equiv
We find
T
resistor
= T
air
+Q · R
t
equiv
= 35 + (0 .1) (38 6.8) = 73. 68
◦
C
66 Heat conduction,...