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Đề lý phân ngành năm 2011 PFIEV
Typology: Exams
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Ciiu 1 : (15 #it&)^ J^ -
A quay xung quanh m c n h ngang 0 v6i v& t6c g6c khang d6i w. Khokg cach til m6c A t6i trgc quay 0 b h g r (xem h i 1). (^) ,, B6 qua moi ma'siit. HHy thi6t l@pphucmg Mnhvi phiin m6 tii chuy&ndong cfia chit di6m M khi d h g d@ 1 a t dong luc hgc trong he qui chi& +. phi GALILEE.
Cho : -<<I rwL ; B<< g
Clu - 2 : (15 d i h ) Mot sqi day k h h g &,dai 1, kh6i lupng kh8ng dSng k&.Hai chit di&mMI va M2 c6 kbgi lupng ml v l m2. Ngufri ta l u h spi day qua a& chi 18 0 ch& di&mthuoc -- mat p h h g n h ngang P (0, ex,e, ) v l 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, M2buoc phHi truqt k. n g ma sit, M2 tren trgc &ing ddimg (0, <) h u h g xu6ng du(ri, MI tren mat phibg nhn ngang P. - - Lfic t = 0, M2 duqc bu8ng ra khBng v@nt6c ban dhu vh MI, (r A sao cho OA = r, ,c6 mot v@ntbc 6 tqrc giao xuyen tgm (yb vuBng g6c v(ri <). @em h i 2). 11 Tim bibu thuc cfia vo d&M2 d h g yen. Trong cac di&uken dc6, chuy&ndong ciia MI nhu th6 nho? U Xtrc d@ th6 n b g hi& d w g Gdr) cfia he.
Ciiu - 3 : (30 dilm) - HINH
trqng thsj A-c6 iip s u b PA = 15,55 bar, nhiet do tA = 200°C v l cho dHn d b g entropi
11 Hay b i b di8n qub trinh bi6n thi&ntr&ng i h db entropi (T, S) khi he di tii trgng thiri ddu dkn trgng thsi cu6i b h g cach sir d w g ciic dubng d b g $ PA, PB va d u h g cong biio hba. 21 Hiiy $ dung nguyen 19 I1 nhiet dong hoc d&tim bi&uththirc entropi bikn ddi
Tu 11 va 21 hay:
31 X6c dinh him luqng nuirc lbng rieng xl (r trwg th6i c d i ; Cho bikt : * cl = 4,18 KJ/kg.K dgi v6i nu& lbng vh gigis. thikt r h g nhiet dung
41 Xac d m bikn thidn entanpi ri&ngtrong qua Mnh bi&ndbi.
nhu kh6ng nkq h a n g d h duqc vh vl<< vb. HHy xbc d w c6ng t h u b nghich trao dbi
R = 8,3 1 J1mol.K w.mFA L a. A e K
-^ CSu^^4 :^ (20diim)^. l/ a/ Hay vikt 4 phurrng trinh MAXWEU trmg c h h k&g du6i &g tich phiin vh vi p h h trong he qui chi& GALILEE. b/ N&u 9 nghia cila m8i phuong trinh vh cfia cH h& h m g Mnh MAXWELL.
N tnrhg cfia 6ng d Q dien t h h g dlii v8 hw). bl XBc dinh d i e t r u h g cHm img b&i dbng d i b bi6n t h i h i(t).
Mot &a dk @n mbng coi nhu trp trbn dbc, t n ~ c
lupng rn (Q vh m dugc p h h b6 dku theo d tich). Dia c6 (^) I Q 7 I th& quay do quanh trpc (OZ). 3). IXa duqc
B = B(t)e,. 1/6thbidi&nt=0Ntrutmg tangnhanhtilgiiitri
dwg.