, "" " ", (" ") " " (" "). , .
(60 70- . .) " ", . : , , . (80- . .) ᒺ (, , . .) . , ᒺ , ᒺ, ᒺ .
ᒺ, .
[13].
1. . , , .
, ( ) . , , .
, ᒺ .
- , . ̳ , [13].
a) S:
dS
P = ──, (2.1)
dt
) :
t 2
S = ∫ Pdt, (2.2)
t 1
2. . (, , ) , .
, , :
( );
( );
( , );
() ( ),
(/ , );
( "" S, "" V "" t - : S = V × t);
() ( ᒺ, ) [13].
ᒺ , . , .