1-16
2-7
3-5
4-19
5-11
6-
7-8
8-
9-14
10-4
11-18
12-6
13-15
14-
15-17
16-3
17-20
18-4
19-1
20-2
S=2мм^2=0.000002м2
I=20мА=0.02А
U=12мВ=0.012В
p=0.1<span>Ом×мм^2/м.
--------------------
L-?
R=p*</span>
![\frac{L}{S}](https://tex.z-dn.net/?f=+%5Cfrac%7BL%7D%7BS%7D+)
L=
![\frac{RS}{p}](https://tex.z-dn.net/?f=+%5Cfrac%7BRS%7D%7Bp%7D+)
R=UI=0,00024 Ом
L=
![\frac{0,00024*0.000002}{0.1}](https://tex.z-dn.net/?f=+%5Cfrac%7B0%2C00024%2A0.000002%7D%7B0.1%7D+)
=0,0000000048м=0,0000048мм
430г = 0,43 кг
F=ma
F= 0,43*1,6= 0,688 Н
V=V0+at, V=0,8t, V0=0, a=0,8м/с^2.