(), .
, . O . [10].
, , .
. y z, , , .
(3.1)
0
.
, , r l (. 3.1).
. 3.1.
, . (1 1) P1 = p1πr2, (2 2) 2 = p2πr2; p1 p2 (1 1) (2 2). = 2πrlτ, τ . , , , "".
:
(p1 p2) πr2 - 2πrlτ + (-M ) = 0. (3.2)
, , , .
,
(3.2) ,
(Δp = p1 - p2) (3.3)
.
(3.4)
. (3.3) (3.4)
(3.5)
(3.5) .
.
(3.1) :
(3.6)
(3.6) r r. r = , ( ):
(3.7)
(3.8)
r = , τ = τ; r = r; τ = τ. (3.7)
(3.9)
, , f1(τ).
.
, r r+dr.
,
(3.10)
(3.10) :
,
(a) = 0 dυ = -f1(τ)dr
(3.8),
(3.11)
, f1(τ). .
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