[r]
(1)DE
rHI
HKtr
NAtur
zott&zatz
t
trt6N
:VATIJ
Thbigiail
45 phfrtrdpnNc
lCflu l:M$t
vdng-d^av c6bin
kifi
R =15cmd{t
trongtu
trutmg ,ban dAucim
rmgtu
c6 tlQ ki,n B=0, 1T.ffit
phing vdng d6yvu6ng
gbavu
aintluotrg
glio ttr SaukSpng
thbi gian
l0''s
d${6n
cflm img
ft
gnm
Adn9
.tintr
sudt di-€n dQngoim
ri'ngxuft
hi$n frongfrrg
dlry ? (1,5 d)Cflu
2:IXiy
sosinh
cdu tgo crla kintr thi6n vfurkhfc
xpvi
kinh hi6nvi
g6tte
vi
khic
nhau &,hirg
tli6mnio?
(1 d)
.Cflu
3:
(1,5d)
,al
Xt i
ctridu tiaeing
dqn siq qualing
kinh
c6 chi6t su6t nd{t
Eong kndng[{ri voi
g6ctoi i
bft
ki Hiy
vi6t
c6c c6ng thucling
kinh ?b/ ChiEu m$t
ctrirm
tia sing songsongtfi
I
m{t
b€n c0a Hngkinh
dit
trong litrdngkhi
tnryAnsang
m{t beo'ftrl'hai
hdi 1u6n c6 tia 16m{t
b€n tlru kttdng? Tpi sao.?Cflu
4:(
1,5 d)^t
W
*4"
Aioi, ghu,ongvi
ohiAu oua lpc tu tric dpng l€n itopn ddng ilignd}t
fiongtu
tutmg
ddu (phit
bi6u quy tilc n€u c6)
ti
tvttt
doenrOay Ofind*i
5 om tt+t teffi
lmg dAuvt
hqpvfi
vdcto
oemftrg-tt
*0E&;l00
Ddqg i!r6.n gu4 dty c6 ou,ong d0 0,75
A,lpc
tEtr{c dgng l€n do6n dAy tlo H3.10-'N
t{nhcim
tug
ttrcrlatutnrang.?
!t.t€ tt)
chru F -,:
(
1,5 d)
Cho mQt-ttrfir"kirih'cO"tridt *udt U n
=
1,5vi
c6 m$t mat6i
ben kinhli
30 cm ,mQl
mit
16m c6btu
ktuh
li
20 cm&t,frong
khdngltri
a/ finh ti€u c1r crla
th{u
ktulrvi
cho tti4t AayB
thdukinh
lopigi
?b/ n6rr
dit
vft
s6ngAB
cich
th6ukinh
120 cmthi
hfry xirc dinhvi
ri
ctu
emh ?C4u 6:
(
1,5 d ) MOt kinh hi6ovi
c6 vflt kinhvoi
ti0u cpfi
:
1,5 cm ,fti
kinh vrfi ti6uqr
f2 = 4,5dG-ftroang
cfch
gifra hai kinh 0r0z:
16 cm MOtvflt AB
tlit trxio
v$t k{ntrMtt
m$t hqc sinh , lrtr-Ong iO t$t o6 khoeng g1rc cfln H 25 cm khi ng8mchtng
&vd qrc
thi
y
s6 tCIi gi6c crla kinh hi6nvi
Ii
bao nhi€u ?bl
ktroturg c6ch drtirvil
AB it6nv$t
k{nh 0rlibao
nhi6u?CfluJ:
{t,J d}
MOt nguiri ooili6m
cpc vi6n c6ch m"it socma/