π π π ω ω π 1 5 R

10
1.
.
,
,
7 ,
,
-
,
-
3 .
?
1) 7,6
2) 2,1
3) 4
4) 10
:
ω=
TT
2π 2π 2π (T2 − T1 )
2π
+
=
∆t =
= 1 2 = 2,1 .
T1 T2
T1T2
ω T1 + T2
: 2)
2.
1 ?
1) 2300
6400
2) 6400
3) 7900
4) 14300
:
2
2s
GM
R
g= 2 =
= g0
2
t
R+h
(R + h )
t 2 g0
− 1 = 6400 5 − 1 = 7900
2s
(
h=R
)
: 3)
3. !
100 "
.!
?
1) 4 "
2) 20 "
3) 100 "
4) 500 "
:
#
#
#
: R=ρ
$
:
l
.
S
1
R
5
: R =
: 1)
R
R 100
=
=
= 4(
5 ⋅ 5 25 25
)
.
10
4. !
%
&
25
220 '
&
1) 4,4
1 (,
2) 6,9
,
-
80%?
3) 264
4) 412,5
:
η=
I ⋅U ⋅ t
,
A = I ⋅ U ⋅ t ⋅ η = 220 ⋅ 25 ⋅ 0,8 ⋅ 60 = 264
: 3)
5.
,
)
5
F = –10
,
–
?
1) –10
2) –5
3) 5
4) 10
:
D=
1
+ D2 = −10 + 5 = −5
F
: 2)
6. !
10 ,
2,7 / 3. *
0,5 " ?
2,8·10–8 " · . "
$
.
1) 10
2) 1
3) 15
:
m = ρsl
4) 40
10
R=
γl
s
=
γl 2 ρ
m
γl 2ρ 2700 ⋅100 ⋅ 0, 000000028
m=
=
= 0, 015
R
0,5
: 3)
$
7.
3 /
$
60 °#. #
$
?"
8 / ,
-
.
:
2
2
o
: v= v1 + v2 − 2 ⋅ v1 ⋅ v2 ⋅ cos60 ,
v = 32 + 82 − 24 = 7 / .
:7 / .
8. '
20 °#. !
2,1
/( ·!),
2
3,6
.
–10 °#. *
333
4,2
/ ,
/( ·!). !
-
?
:
q=
m ⋅ ( c ⋅ (t − to ) + c ⋅ (to − t ) + r )
,
τ
q=
to = 0 # −
m ⋅ ( c ⋅ t − c ⋅ t + r ) 3,6 ⋅ ( 84 + 21 + 333)
=
= 219 '
τ
7,2
: 219
.
.