, , , .
.
1. .
2. .
3. .
4. .
5. .
.
: ϳ / .., .., .., .. . .: ., 2001. 447.
8. 2. 2.4.
.
:
1. .
2. .
3. .
4. .
5. .
. - , , (. 1). , , , .
. S S :
S = 2πRH,
S = 2πRH + 2πR 2 = 2πR(H + R), R, .
, , , (. 170).
, , . . S, l R. (. 170) , α 1, (1). α l R. 1 2πR ( ), 2πR = , . ϳ (1), : .
. 170
, : S = πR l.
. S
S = πR (l + R).
S l r R (R > r). S , , 1 , 1 (. 173). S = πrl , :
S = πR AS π r AS1 = πR(S 1 + 1 ) π r1S1.
, , 1 = l,
S = πR l + π(R r)SA1.
|
|
SA1 l, R, r. S11 SOA , S,
, . : SA1 = ;
S = πR l + π(R r) = πRl + πr l = π(r + R) l.
, :
S = π(r + R)l.
S. = S + πr2 + πR2 = π(r + R)l + πr2 + πR2 .
1
r . , ' V
V = Sr, S .
'
' (. 179). ' V ' , , :
V = S1r + S2r + S3r +... + Snr = r (S1 + S2 +...Sn) = rS,
S1, S2, S3 ,..., Sn , S .
2
r. .
'
. , . , , .
Sn , Vn '. , 1, : Vn = S R.
, , S, ' ' V :
V = SR, : S = = = 4πR2.