1.
ɑ J, . ɑ, .
(10 )
: S= = (1); (2), t . (1) (2) , Þ . max . S Þ; ; Þ Þ ; . | |
, : (; : : S= = : , : . |
2.
. Q , ? , ? .
(10 )
, Q = ucD, u - , c . c = cv + R, cv . ( ) cv = , c = ; ( ) cv = , c = . = (S ) V = uRT. , Q = ucD = . Q1 = , Q2 = | |
, : ; : Q = ucD cv = , c = ( ) cv = , c = = V = uRT , : Q = Q1 = Q2 = |
3.
r = 20 . , , , 25 %?
(10 )
, , R, P=UI, I , U . , U = IR Þ , P = I2R = R = r Þ , , 25 % Þ P = 0,75 Pmax Þ , : R1= 6,7 ; R 2= 60 . | |
, : ; ( , -): U = IR P = R = r , : P = 0,75 Pmax R1= 6,7 ; R 2=60 . |
4.
|
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S1 = 100 c2, h = 10 (ρ= 1 /3), S2 = 20 c2 , . . , ?
(10 )
. 1 . 2 , , : F = rg(H h + )S2, S1 (. 1). hS1 = H(S1 S2)+(h- ) S2, =h+ (. 2) F = F(X) 0 h: = Þ = | |
, : , ; ( , , , , ): F = rg(H h + )S2 hS1 = H(S1 S2)+(h- ) S2 = , : =h+ = |
5.
, , υ0 3υ0 (υ0 = 1000 /) . L , ? = 1,6*10-19 ; m=9,1*10-31; e0= 8,85*10-122/(*2)
(10 )
u. , , . Þ 3mJ0 - mJ0 = 2m u u = J0. (k = ) . , , 6,3 . |
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, : , ; ( , ): u 3mJ0 - mJ0 = 2m u; , : L = 6, 3 |