1.01. R = 4 . s = A + Bt 2, A = 8 , = - 2 /2. t, n 12 /2. υ, τ t.
1.02. x 1 = A 1 t + + 1 t 2 + 1 t 3 x 2 = A 2 t + 2 t 2 + 2 t 3, A 1 = 4 /, 1 = 8 /2, C 1 = - 16/3, A 2 = 2 /, 2 = - 4 /2, 2= 1 /3. t ? υ 1 υ 2 .
1.03. x = A 1 + 1 t + 1 t 2 y = A 2 + 2 t + 2 t 2, 1 = 7 /, C 1 = - 2 /2, 2 = - 1 /, 2= 0,2 /2. t = 5 c.
1.04. s t
s = A + Bt + Ct 2 + Dt 3, C = 0,14 /2 D = 0,01 /3. t = 1 /2? .
1.05. m = 10 R = 0,2 , . φ = + B t 2 + C t 3, = 4 /2, = - 1 /3. , , . t = 2 ?
1.06. , J = 50 2, : φ = + B t + C t 2, = 2 , = 16 /, = - 2 /2. N. N 1 t = 3 ?
1.07. s t s = A t B t 2 + C t 3, = 2 /, = 3 /2 = 4 /3. : 1) υ t; 2) s, , υ t = 2 .
1.08. s t s = A + B t + C t 2, = 3 , = 2 / C = 1 /2. , .
1.09. = A t + t 3, = 6 /; = - 0,125 /3. : 1) t 1 = 2 t 2 = 6 ; 2) , .
1.10. . 1) , 2) , 3) .
1.11. υ = 4 /. , υ . h ? .
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1.12. 20 . . , .
1.13. υ = 2 / h = 5 . 1) ; 2) ; 3) .
1.14. 10 / 1 . , .
1.15. 5,1 . , 240 /, ? .
1.16. , , t = 0,5 l = 5 . h ? υ x ?
1.17. α = 30 υ = 30 /. t = 1 ?
1.18. m = 0,5 υ = 10 / α = 30 . , T, : 1) t = 0,4 c ; 2) .
1.19. υ , α = 45 , ? t = 6 c.
1.20. υ = 160 / h = 500 . . ?
1.21. υ = 250 /, m = 8 . m 1 = 6 u 1 = 400 / . u 2 .
1.22. , , α = 30 . u 2 , υ 1 = 480 /. m 2= 18 , m 1 = 60 .
1.23. , , m 1 = 2,5 α = 30 υ = 10 /. υ , m 2 = 60 ? .
1.24. m 1 = 70 , υ 1 = 9 /, m 2 = 190 , υ 2 = 3,6 /, . ? , ?
1.25. , υ = 400 /, . , 40 % , 1 = 150 /. u 2 .
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1.26. m 1 = 8 , l = 1,8 , m 2 = 4 . , α = 3? . , .
1.27. 1 = 1 υ 1= 4 / m 2 = 2 , υ 2 = 3 /. 1 u 2 ? , , .
1.28. m 1 = 5 υ 1 = 1 / m 2 = 2 . 1 u 2 . , , .
1.29. m 1 = 2 40 % . m 2 . , , .
1.30. m 1 = 5 m 2 = 5 υ 2 = 600 /. υ 1 .
1.31. m = 2 F = 10 . . F min , ? 20 . μ = 0,5.
1.32. , , m 1 =150 m 2 = 100 , , . , : 1) ; 2) T, 3) , 40 .
1.33. , m 1 = 200 m 2 = 140 . , . . . , 25 .
1.34. , , F = 120 α = 60 , . , 60 10 .
1.35. , . : - m, m. , = 200 , m = 50 . 35 .
1.36. m = 5 , α = 45. t s = C t 2, = 1,73 /2. . t = 2 .
1.37. m1 = 4 . , . m2 = 1 . , , . . 0,5 .
1.38. m 1 = 5 . , . a , m 2 = 2 ? , 10 .
1.39. , m 1 = 1,5 m 2 = 3 . ? . , 45 .
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1.40. m 1 = 1 m 2 = 4 , , . , F = 10 , ? 3 . .
1.41. 1 = 50 m 2 = 60 D = 4 . J , β = 1,5 /2. .
1.42. m = 2 υ = 4 /. .
1.43. , J = 63,6 2, ω = 31,4 /. , t = 20 .
1.44. R = 0,2 m = 10 . , , = 14,7 . ∆t = 10 ? . .
1.45. , , R = 0,5 m = 50 , F = 100 . : 1) β; 2) n = 100 /.
1.46. , J = 24,5 2, , n = 20 /. ∆t = 1 , , . : 1) ; 2) , .
1.47. , m 1 = 100 m 2 = 110 . , m = 400 ? .
1.48. = 1 . , N = 80 , . .
1.49. , J = 40 2, = 20 ͕ t = 10 . , .
1.50. β = 0,5 /2 t 1 = 15 L = 73,5 2/. t 2= 20 .
1.51. = 5 . l 1= 70 . n 1 = 1 -1. , , l 2 = 20 ? () J = 2,5 ∙2.
1.51. V 1 = 3 3, V 2 = 7 3, V 3 = 5 3, ( 1 = 2105 ), - ( 2 = 3105 ) - ( 3 = 6104 ) . , . ?
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1.52. . , 20 . 21 . 26,5 . ? 20 .
1.53. 4 32 7 700 . . .
1.54. (2) 50 . , 477 , .
1.55. , , , . , 27 30 ?
1.56. 1 1 . .
1.57. 20 . , , ?
1.58. 0,5 3 , 1020 , 41020 3,31020 . : 1) ; 2) . 127 .
1.59. 20 . t 1 = 20 1 = 1,2107 . , h = 30 t 2 = 15 ? = 105 .
1.60. l = 1,6 , p = 105 , S = 200 2. F, , l 1 = 10 .
1.61. T = 280 . : 1) ; 2) ΔU; 3) Q, . m = 0,2 .
1.62. m = 0,1 T 1 = 200 2 = 400 . , , Q ΔU.
1.63. , v = 0,4 , Q = 800 ? = 300 .
1.64. m = 5 , = 290 , ? Q.
1.65. , , Q = 21 . ΔU .
1.66. m = 5 , Δ T = 150 , V. : 1) Q, ; 2) Δ U ; 3) A.
1.67. V 1 = 10 3 p 1 = 100 . p 2 = 300 . : 1) Δ U ; 2) , ; 3) , .
1.68. V = 50 Δ p = 0,5 . , .
1.69. , , 70% , , . , , 5 . : 1) ; 2) , .
1.70. , Q = 42 . , , Δ U .
1.71. , 2 27 0, , . .
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1.72. 0,1 3,5 . 25 0. .
1.73. , , 1,32 . ?
1.74. 8 2 , 2 . ?
1.75. , 00, ?
1.76. 0,5 50 . , 100 . , 0,4 .
1.77. 10 50 200 0. , .
1.78. 6 100 50 .
1.79. 28 , , 5 . .
1.80. 28 , 25 0 100 13 . .
II
( ) | |
E=F/q, , F , q, | |
φ , | , q , , r , , |
τ = q/l, τ = dq/dl, τ , q , l | |
σ=q/S, σ=dq/dS σ , q , S | |
ρ = q/V, ρ = dq/dV ρ , q , V | |
dS , , α | |
, | |
, () | |
q φ1 φ2 | 12 = q (φ1-φ2), 12 , q , φ - |
C=q/φ, , q , φ - | |
C = S/d, =q/U, C , , S , d , U , | |
W = qU/2, W=CU2/2, W=q2/(2C), q , U , C | |
I =q/t, I =dq/dt I , q , t - | |
j= I /S, j , I , S | |
, | , I - , , U - , R - |
, | |
() | , I , ..., R , r |
Ii Ri , - | |
= IU, P = I 2 R, P=U 2 /R, , I , R , U - | |
- | dQ = I 2 Rdt=IUdt, dQ , , I , R , t , U - |
- | j=γE, ω= γE2 j , γ , - , ω |
B=mm0H, , , μ , 0 | |
-- | , - , μ0 , I , , , -, , α |
μ , μ0 , I , r0 , | |
μ , μ0 , I , R | |
μ , μ0 , I , N , l | |
μ , μ0 , I , N , l , S , , , V , | |
, ( ) | F = I B l sin α, , F , I , , l , α |
, I , S , | |
F = q υ B sin α, q , υ , , α | |
= B S cos α, = Bn S, , B - , S , α , n S | |
dA = Id, A , , I | |
, , ψ , t - | |
, , L , I , t - | |
L =V, μ , μ0 , V , n | |
I0 , R - , L - | |
( ) | w = 2/(2 ), w = 2/ 2, w = B/ 2, μ , μ0 , B - , |
, s , Dn s, , | |
, ( ), , μ0 , , , n . |
1. 9 Q -Q l = 50 . Q 1 , . Q 1, . Q 1 ?
. Q 1 , , , . , Q 1 , . , I, II, III (. 4) . , Q 1 .
. 5.
I (. 5, ) Q 1 : . , 9 Q, ,
-Q, 9Q Q 1, ( ) -Q. .
II (. 4, ) -Q. , .
III (. 4, ) , I, -Q Q 1, 9 Q. , , , . .
= (1)
l+ Q 1. (1) ,
9 Q Q 1(l + x) 2 = Q Q 1 /x 2, l + x = ,
x 1 = + l/ 2,
x 2 = - l/ 4.
x 2 ( , ).
Q 1, . , , . Q 1 : .
Q 1, . , , Q 1, , , . . . Q 1 . Q 1. , . . , . . . , .
Q 1, , , , . . | |>| |. . Q 1 . Q 1 , , . . | |>| |. Q 1 . . Q 1.
. 6.
2. Q 1 = Q 2 = Q 3 = 1 . Q 4 , ?
. , , . , , - , Q 1, . Q 1 , (. 6):
(1)
, , , Q 1 Q 2, Q 3, Q 4;
, (1) : F - F 4 = 0, F 4 = F. F F 2, F 3 , F 3 = F 2,
F 4 = F 2 .
, Q 2 = Q 3 = Q 1,
Q 4= (2)
,
, cos α=cos 60=l/2.
(2)
Q 4 = Q 1 .
:
Q 4 = 10-9 / = 5,7710-10 = 577 .
3. l = 20 . = 10 Q 1 = 40 , F = 6 . τ .
. F Q 1 τ . , τ.
. 7
F , , . . (. 7) dr dQ = τdr. . , ,
d F =
a a + l,
F =
, . :
.
:
4. Q 1 = 1 Q 2= - 2 d = 10 . φ , , Q 1 r 1= 9 Q 2 r 2 = 7 .
. , , , . , : . , (ε = 1) Q 1 Q 2, .
(. 8.) Q 1, ; , Q 2 .
. 8.
, (1)
. (2)
:
= (3)
α - , r 1, r 2 d: cos α = . cos α :
cos α =
1 (1) 2 (2) (3) 1/(4 ) ,
= (4)
φ , Q 1 Q 2, ;
(5)
, Q r ,
. (6)
(5) (6)
+ ,
:
=3,58103 / = 3,58 /;
=-157 .
. 9
5. Q = 40 τ = 50 /. , , , .
. o , oz - (. 9). dl. dQ = τ dl, , , d , ,
,
r -, dl .
d : d 1, ( Oz), d 2, ( o), . .
,
. , (dQ = dQ'), , : . () .
oz ( , Z), .. .
.
dE = , r = = = cos α = (R/2)/ r = l/ ,
dE 1 = = .
.
Q = 2 πRτ : R = Q /(2 πτ).
.
. (1)
, (/):
, (1), () :
= / = 7,94 /.
6. R 1 = 6 R 2 = 10 Q 1 = 1 Q 2 = -0,5 . , r 1= 5 , r 2 = 9 , r 3 = 15 ). (r).
. , ,