4. t1 = 16,1 h = 5 . t2 ?
5. , t1 = 0, , 10 . , , t2 . g = 1,4.
3 - 4
7
1. R1 = 10 R2 = 20 . - d1 = 3,33 /2, - d2 = 6,66 /2. j1 - j2 .
2. R = 1 U1 = 15 U2 = 25 Dt = 20 ?
3. , l = 12,56 , = 4 . J = 0,6 . a = 45o . , .
4. l0 , l = 400 vmax 0,65 /.
5. ¢ = 0,67 . = 2500 , S = 10 2. , ?
1 - 2
8
1. -
, b . .
2. j = + t + Ct2, = 2 , = 16 /, = -2 /2. J = 50 ×2. t = 3 .
3. = 240 m = 60 . = 2 /. = 4 / . U . .
4. m = 50 , x = Acoswt, = 10 w = 5 c-1. Fx, .
5. = 280 . . = 0,2 .
3 - 4
8
1. , r = 10 R = 1 . d = 0,1 /2.
2. ,, S = 10 2,
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J = 100 .
3. , , , . R1 = 5 , R2 = 2,5 . m1 / m2 , , .
4. = 250 /2. lm ?
5. , 10 .
1 - 2
9
1. -
, b . v.
2. U = a / r, r - - , a - . (1, 2, 3) (2, 3, 4) .
3. , m . h , m = 0,1 ?
4. x(x,t) = 10 cos (3400t-10x) ( , x ). .
5. , V = 5 , D = 55 . .
3 - 4
9
1. d = 20 /2. j1 - j2 , r1 = 5 , r2 = 10 .
2. R = 3 , . , t = 8 , 200 . q, . , , .
3. l = 100 L = 1 , ?
4. , Dj = 200 , l = 2,02 . m , .
5. = 10 . S , lm = 700 .
1 - 2
10
1. - , b . .
2. - . .
3. 3 4 / . , , .
4. . 1 = 3 2 = 4 . .
5. S = a + bT, = 100 /, b = 5 /2. Q 1 = 290 2 = 310 ?
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3 - 4
10
1. r . R1, R2. , .
2. l = 5 U = 1 . .
3. = 1 J = 1 r = 1 . , , , . q, , . R=10 . .
4. 0,67 . = 2500 , S = 10 2. k .
5. l0 = 275 . .
1 - 2
11
1. - , b . a.
2. - . . . .
3. m = 60 = 100 . n , r = 5 ? = 4 /. R = 10 . , .
4. m = 0,01 x = 2 . = 0,1 . .
5. , , h . 0 .
3-4
11
1. R = 5 r = 10 /3. r = 3 , .
2. J = 3t2 + I. 5 ?
3. , S = 5 2, N = 1200 . J = 2 0,01 . .
4. hn , u=p/2 ?
5. lm Dlm = 400 . .
1 - 2
12
1. - , a b . t .
2. zC, , j = At + Bt3, = 2 /, = 0,2 /3. z, t = 2 , J = 0,048 ×2.
3. , , , , . 1000 . l = 1. , a = 10 .
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4. 1 10 . t 100 ?
5. , , h e . 0 .
3-4
12
1. q1 = 8 q2= -6 r = 10 .
2. , 5 , 2. r = 2×10-6 ×.
3. l = 50 S = 4 2 d = 0,2 , . .
4. Dlm = 400 . .
5. l = 10 .
1 - 2
13
1. - , b . t .
2. R = 0,2 F = 98,1 . = 4,9 ×. m , , b = 100 /2.
3. . m2 , m1 . h , m1 = m2.
4. x(x,t) = 5 cos (3200t-12x), , . .
5. , m1 m2, m2 > m1. n10 n20, n20 > n10. , g, h, .
3 - 4
13
1. q1 = 40 q2 = -10 d = 10 . , r1 = 12 r2 = 6 .
2. , Dt = 10 J0 = 10 J = 5 ?
3. , = a + bt2, a = 0,1 , b = 0,01 /, a = 20 , . , 5 , R = 0,5 .
4. hn = 0,4 . .
5. n , , U = 3 . n0 = 6×1014 .
1 - 2
14
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1. - , b . t .
2. l = 1 m = 0,5 z, . b , z = 98,1 ×?
3. . = 60 . m = 20 . V1 , = 1 / ? .
4. 1000 /3 x(x,t) = 80 cos (1800t-5x), x - , , . .
5. m 1 = 25 2 = 75 .
3 - 4
14
1. , q.
2. J = J0e-at, J0 = 20 , a = 100 -1. , Dt = 0,01 . R = 10 .
3. r = 4 , R = 0,01 , = 0,04 . a = 30 . , ?
4. u = 120 , = 0,5 . .
5. l , Dj = 100 .
1 - 2
15
1. , t j = at2, . 0 t.
2. m = 0,5 x = A Bt + Ct2 t3, = 5 /2, = 1 /3. F, .
3. R = 1,5 = 180 n = 10 -1. m = 60 . , ?
4. 25000 /3 x(x,t) = 80 cos (1800t-5x), x - , , . .
5. 1 = 80 2 = 320 . P = 1 , = 300 . V .
3 - 4
15
1. j = a (x2 + y2) bz2, b . .
2. R = 20 Dt = 2 J0 = 0 Jmax = 6 . , .
3. l = 10 , = 57 , , q = 0,5t 0,48, . F = 2 . ?
4. 25- = 2450 . = 0,3. .
5. , , l = 555 ( ).
1 - 2
16
1. j = t 3t3, t , . .
2. m , , . (t) , .
3. - 70 14 -1. 25 -1. ?
4. m = 10 x = 5 sin (pt/5 + p/4) . Fmax, .
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5. 1 = 7 2 = 10 = 290 = 1 . .
3 - 4
16
1. R1 = 3 R2 = 6 . q1 = -1 , q2 = 2 . j r = 9 .
2. J = J0e-at. , R , , J0 = 10 , a = 200 -1, R = 20 .
3. , l = 20 , a = 60 , , q = 0,1t 0,25, . = 14 .
4. = 10 . S , lm = 700 .
5. l , Dj = 1 .
1 - 2
17
1. j = 9t t3, t - , . .
2. F = 10 , x = A Bt + Ct2, = 1 /2, t . m.
3. , . . = 60 , m = 20 . , V1 = 1 / . l = 2 . .
4. x = A0 e-bt sinwt. t = 0.
5. = aV, a - . V0. h . , .
3 - 4
17
1. R1 = 10 R2 = 15 , d = 2,5 /2. Dj .
2. J = 0,5 . S = 5 2. .
3. W , N = 500 , R = 20 l = 50 , J = 5 .
4. . lm = 500 . , .
5. l , Dj = 1 .