xdc dinh loai thau kinh?. Giai thich?[r]
(1)'- ' DE THI HQC Xv U
M6n: Vat ry 11 NC thdi gian : 45Phrit
C6u 1 (lrsd) Vflt sang AB cao I cm qui ttrau Untr cho 6nh rd n6t tr6n mdn 6nh vdL cao
s
Zcm Mdn anh
cich vAt 45cm
a xdc dinh loai thau kinh? Giai thich?
b Xac rlinh tiflu c1r cria thfu kinh:tr€n?
, \ N, \
CduZ (1,5d): Mat ctra mQt ngudi c6 kho&ng nhin rO ttr 12 cm
r\ | "-*- ,'
dOn 52 ctn a Ngudi d6 bitat gi? Gi6i thich? , , 7
- ! *a + L^^ ^L;,
; ij[;hi; duoc'vflt xa v6 cgc md khong didu tiiSt, ngudi d6 ph6i deo kinh co dQ ts bao nhi6u' Bi6t rdng kinh deo c6ch mht}cm r 1 ! r
-r- : i
c Khi deo kinh tr6n, nguoi nhin dugc vflt gan nhflt c6ch mit bao nhi.iu? (kinh deo c6ch mitzcm)
c6u 3 (1,5d): , n"i'aai aan ir,ang oai d4t ong song, cirngchi6u, dfit tr"nng khong vd c6ch
doan cm, ddng aiQn fray qua trii ddy dan .i .uong AOIA" luqt h l{ ya 0,5A' X6c dinh vecto cim
,i"i,t, t6nl hq,itai di6m M ta.n aay thrl nhSt cm vd c6ch ddy thu hai 2cm'
- -\
Cdu4 (1,5d): Mot vOng day trdn b5n kinh R: 3,14cm c6 ddng di$n Ir :4A ch4y qua' NIm trong m{t
phAng vdng d6y, c6ch ia1n uOng ddy mQt do4n b : 10cm, ngudiia d6t ftOt ddy d6n tnang ddi c6 ddng Aien l, : l2,5Ach4Y qua nhu hinh v6'
al Hdy x6c dinh cim ring tt tai t6m O cria hinh trdn?
UlpA
"a,
n"g ttr tai tam"O bdng kh6ng thi cubng d0 ddng'dign Iz phrti.bdng bao nhi6u? Cdu 5 (1,5d):
al&dyneu c6u t4o cria 16ng kinh vd vitit c6c c6ng thric cria ldng kinh c6 chitit su6t n, d[t trong rn6i trudng c6 chi6t su6t n2 o , .,
bl MQt t6ng kinh d6t 4h6rg c6 g6c chitit quang ld 600 chitiu I tia s6ng don sic thi th6v g6c
lpch c*c tiOi n 300 Tim chitit su6t crial6ng kinh n6i tr€n ?
6au O 1tA; : alHdy n€u cdng dung vi c6u tao cira kinh hi6n vi
b0 NIE rrgud'i c6 rnit kh.ng bi tat nhin 16 it ZS f"*l Aen ,O tUg ,quan s6t mQt v.t nh6 qua kinh hi6n
,i valr.ir1, co tieu cu fr:4inm, ir,i rurn c6 ti.u cu frl6mrn Bii5t orOz:20cm Ti*r d0 ddi quang h;.,;;6 uOigiac cria kinh khi:ngudi niy ngim chung d vO csc
CanT (1,5d): Th ndo ld hign tuqng tu
"a*]Ncu m6t vi d;;t r'ipn toqng
tu cdm thgc ti5'
vitit c6ng truic tinrr il-J;5;';il;;"rd o*ou, hinh trp dai khong khi, chr thich ten gsi vdr don
v!tirng d4i lugng?
T. *-l
*