rci rrn<br />
<br />
THANH PHO THAI NCUYEN<br />
PHONG CIAO Ouc vaDAo<br />
<br />
UBND<br />
<br />
on cuiNn<br />
<br />
ri<br />
<br />
tnrc<br />
<br />
Bii<br />
<br />
cHo. N Hec srNH GrOr Lop s<br />
Nim hqc2017 - 2018<br />
vrON THr: vAr<br />
<br />
Thdi gian ldm bdi: 150 philt, kh6ng kA thdt gian giao<br />
<br />
1 g,O arcm1. Mqt nh6m du lich gdm 3 ngudi ilfnh di tt dfa itiem A rltin itla di6m<br />
B, kh911e chch g;Aahai dia di6m d6 ld L 22kr\. H9 chi c6 mQt xe dap khong chd qu6 hai<br />
ngudi. vpn toc cria ngudi di b0 ld v6: 5km/h, cta xe dpp mQt ngudi ld v1: z}km/hua .,iu<br />
xe rl4p hai-ngudi ldv2.:15km/h. Nh6m du lich ct6 cAn bo tri nhu th6 ndo d€ thdi gian d6n<br />
dia rli6m B ld ngAn nn6t. fim thdi gian d6.<br />
Bii 2 (4,0 di€m). MOt binh cdch nhiet ban dAu chria nu6c o nhiOt d0 to: 400c. Tha<br />
vdo binh mQt viOn bi kim lo4i c6 nhiQt d0<br />
I2}}C,nhiQt dQ cria nudctrong binh khi c6n<br />
bing nhiQt ld t1: 44,0C. Tii5p theo gfp vi€n bi ra vd thi vdo binh vi6n bi th;2 gi6ng nhu<br />
vi6n bi tru6c. Coi rdng chi c6 sg trao d6i nhiQt lugng gifia c6c vi€n bi vd nu6c, b6 qua sg<br />
h6a hoi cria nu6c. Gia thi6t nu6c kh0ng bitrdn.u trgoai.<br />
1. Nhiet dQ cria nudc trong binh khi cdn bing nhiQt ld bao nhi6u n6u ta th6 titip vien<br />
bi thri hai?<br />
2. Ghp vi€n bi thri hai ra vd thd vdo binh viOn bi tii5p theo. L{p lai cho d6n vi€n bi<br />
thri n thi nu6c trons binh bit e16u sdi. Tim n.<br />
<br />
:<br />
<br />
t:<br />
<br />
Bni 3 Q,0 di€m). Cho m4ch diQn nhu hinh vC<br />
b6n. E4t vdo hai di€m A, B mQt hiQu diQn thtl khdng<br />
OOi U: 6V. Cdc diQn trd R1 : 1,5,C), R2 :.3C), b6ng<br />
ddn c6 di6n tr0 & : 3 Q, Rco ld mQt biOn trd con<br />
chay. Coi diQn tr& b6ng diQn kh6ng thay d6i theo<br />
nhiOt dQ, diQn tr0 cria ampe kri, kh6a K vd d6y n6i<br />
khdng d6ng kO.<br />
1. Kh6a<br />
<br />
K m0, dich chuy6n con chay M<br />
<br />
ddng diOn qua ddn ra<br />
<br />
ct6n<br />
<br />
vi tri sao cho R6y: lC) thi cuong<br />
<br />
dQ<br />
<br />
Tim rliQn trd cria bit5n trd vd s6 chi cria ampe k€.<br />
{a.<br />
9<br />
<br />
2. Thay OOi Uitin trd 6 trOn bing mQt bitin tro kh5c c6 giltri diQn tro ld 16Q. D6ng<br />
kh6a K, x6c dinh vi trf con ch4y M d6 cdng su6t t6a nhiQt tr€n bitin trd dpt gidtrilon nh6t.<br />
Bni 4 Q,0 di€m). V4t s6ng nh6, phing AB hinh mti tOn, d{t t4i vi tri trudc mQt th6u<br />
kfnh hdi tp c6 ti6u cg f : l5cm, sao cho AB vu6ng g6c v6i tryc chinh cria th6u kinh vd A<br />
nim trOn truc chinh, cho 6nh that ArBr : 3AB (vf tri thf l).<br />
, ^J<br />
1. Bdng<br />
<br />
phdp dgng hinh d€ x6c dinh 6nh, hdy tinh khodng cSch tir v4t t6i th6u kinh.<br />
2. Gitt vat cO dinh, dich chuy6n th6u kinh dgc theo tryc chinh d6n vi tri thri 2 sao<br />
cho thu dugc 6nh that A2B2 :0,5,{8.<br />
a) H6i phni dich chuy6n th6u kfnh mQt dopn bdng bao nhi6u, theo chi0u ndo?<br />
<br />
b) Khi dich chuy6n th6u kinh ttr vi tri thri I dtin v! tri thri 2 th\ inh da di chuyi5n<br />
dugc qudng dudng bdng bao nhi6u trong qud trinh trdn?<br />
. Bni 5 Q,0 die@ MQt lq nh6 bing thuj'tinh dung dAy thuf ngan, dugc nrit chflt<br />
bdng nrit thuy tinh. Tim phuonghnxdc dfnh khdi lugng thu;ingdn trong l9 md kh6ng dugc<br />
md nrit, bi6t kh6i lugng ri6ng cria thuj' ngdn vd thuj'tinh lAn luqt ld Dr vd D2. Cho c6c<br />
dqng cu: binh chia dQ, nu6c, cdn vd bQ qud cdn.<br />
<br />
H9 t6n thi<br />
<br />
sinh.<br />
<br />
...... 56 b6o danh:<br />
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di<br />
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