. , , , .
.
. . , , , . , . , .
.
, , . , . -
. , . + drk.
pk = qk∙drk.
: dAk=Fk∙ drk= qk∙E∙ drk,
qk∙drk=dpk - .
dAk=∙ dk
:
dA V = Ʃ E∙dpi = E Ʃ dpi = E d Ʃpi = E∙ dP
,
,
14
. + . . .
, , .
, .
I , , Δq, Δt, : I= Dq/Dt
|
|
, . Δq, Δ S Δt, .