, - , . (, , ) ( , ) ( ) . (, , ) .
, - . , . , , . () .
, , . , : 800-1000 /, -300-400 /, 3-5 /. (, ) , .
170 . , . , . , . , , . , , , , .
300 . , . 60 . , , , .. , -, , ( , , ..).
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, , , . , . , .
. 400 3/ = 40 /. 1 , , 146 ., 774 ./. , - 100 /.
:
=m1∙n∙ + m2∙n∙,
( ), .;
m1 (), ;
m2 (), ;
n ;
1 ;
1 .
.
:
= 40 / = 40×10-9 /;
= 100 / = 100×10-9 /;
V. = 400 3/ = 4×105 /;
n = 90 ().
m1 = × V. = 40×10-9× 4×105 = 160×10-4 ;
m2 = ( - ) × V. = (100×10-9- 40×10-9) × 4×105 = 320×10-4 ;
= 160×10-4 × 90 × 146 + 320×10-4 × 90 × 774 = 2440 .
, (. . 2.1). , () 2. :
= × = 2 × 2440 = 4880 .
: 4880 .