B~C
THI
PH~V
NG-
N&
2011
M~N
THI
:
VqT
L$!
Th&
gian
Z&m
b&i
:
120
phzir
J
-
Ciiu
1
:
(15
#it&)
-
Mot spi dfiy chi& dli 1, kh6i lugng kMng dhg k6, kMng
bi co dm.
Ngu&i
ta
gib
vlo
m@
&u ciia spi d$ chht di6m M c6
khgi lupng m vl buoc dku
kia
&a
spi
d8y vao chi m6c
A.
M6c
A quay xung quanh mc nh ngang
0
v6i v& t6c g6c khang d6i
w
. Khokg cach
til
m6c
A
t6i
trgc quay
0
bhg
r
(xem
hi
1).
,,
B6
qua moi ma'siit.
HHy thi6t l@p phucmg
Mnh
vi phiin m6
tii
chuy&n dong cfia
chit di6m
M
khi dhg d@ 1at dong luc hgc trong he qui chi&
+.
phi
GALILEE.
Cho
:
rwL
-<<I
;
B<<1
g
Clu
2
:
(15
dih)
-
Mot sqi day khhg
&,
dai 1, kh6i lupng kh8ng dSng
k&.
Hai
chit di&m
MI
va
M2 c6 kbgi lupng ml vl m2.
Ngufri
ta
luh spi day qua
a&
chi 18
0
ch& di&m thuoc
--
mat phhg nh ngang P
(0,
ex, e,
)
vl
gh
2
chht di6m MI, M2 vlo
2
dku sgi day. Ma
sat @a sqi day vii 16 kh6ng dang k6. Cac chht
di&m
MI, M2 buoc phHi
truqt
k.ng ma
sit, M2 tren trgc &ing
ddimg
(0,
<)
huhg xu6ng du(ri, MI tren mat phibg nhn
ngang P. Lfic t
=
0, M2 duqc bu8ng ra khBng v@n t6c ban dhu vh MI,
(r
A
sao cho
-
-
OA
=
r,
,
c6 mot v@n tbc
6
tqrc giao xuyen
tgm
(
yb
vuBng g6c v(ri
<
).
@em
hi
2).
11 Tim bibu thuc cfia
vo
d& M2 dhg yen. Trong
cac di&u ken dc6, chuy&n dong ciia MI nhu th6 nho?
U
Xtrc d@ th6 nbg
hi&
dwg
Gdr)
cfia he.
Chon ghc th6 nhg
E,
$i
0
bbg 0.
Ciiu
3
:
(30
dilm)
-
-
HINH2
Mot lupng hoi nubc
vira
dhg bHo hba khbi luqng m
=
1 kg ban ddu duqc giir
Z1
trqng thsj A-c6
iip
sub PA
=
15,55
bar, nhiet do tA
=
200°C vl cho dHn dbg entropi
dkn tqmg thSj cuBi (trgng thai B) cc6 tip sub
Ps
=
1,O
13
bar, nhiet 66 tB
=
1 OO°C.
11 Hay bib di8n qub
trinh
bi6n thi&n tr&n gih
db
entropi (T,
S)
khi he di
tii
trgng thiri ddu dkn trgng thsi cu6i bhg cach sir dwg ciic dubng dbg
$
PA,
PB
va
duhg cong biio hba.
21 Hiiy
$
dung nguyen 19
I1
nhiet dong hoc d& tim bi&u ththirc entropi bikn ddi
trgng thai ri6ng hhoi
-
16ng
&
nhiet do Te (d6i vbi biin ddi thub nghich).
Tu
11 va 21 hay:
