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1. ,고, ຠ. (, , ,ᒺ)( ,,). 𳿠 ,,堳 . 蠺 . 䳺 , ,䳠 (). , V V + dV, f, , , .



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 ,(). , 젳 ,., , ,꠳. 2..

, . 䳿 :

f = SdV / dx, (1) ,S䳿 , dV / dx .

䳠., ຠ䳺,䳠 , , , . ຠ , ,,, f = 6rV, (2) , V , r .гຠ:

mdV / dt = mg m1 g 6rV.(3) , , , , ,, V0. ,:

4r 3 ( 1 ) g / 3 6rV0 = 0,(4) , , 1 ,,g.

(4), d , :

= ( 1 ) gd 2 / 18V0. (5)  D, (5):

= ( 1 ) gd 2 /[18V0 (1 + 2.4d / D)]. (6) , (6), ,.

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, v,/ , # , 5. ,,고 .Ӡ . , .ᒺV, ຠ, :

V = r 4p / 8L (7) r,L,p ,.

г(7), :

= p[ R 4 r 4 ( R 2 r 2 ) 2 (ln R / r ) 1 ] /(8VL),(8) ., . , , VT :

= VT / 3, (9) .(9), , ຠ볠(9).

(9)ຠ:



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