( ѻ)
:
1. v1 = 2 / . , .
2. 15 100 /. ?
3. 90 . 320 . 6400 . .
4. 50 , , 20 10 . .
5. , 2 6 , 2 / . .
6. , 20 . , , 6 . ?
7. 70 80 . , 100 .
8. , , 300 . , 280 .
9. 0,4 .
10. m1 = 3 , t1 = 40 , m2 = 200, t2 = -5 . ? ( . 4,2 /(*), 335 /)
11. , .
,
12. q1 = q, q2 = 4q r = 3 . q1 , ?
13. r = 1,5 , R1 = 3 R2 = 7,5 . , ?
14. ( ), B =10-3 R = 23 v = 4*107 /.
15. , l = 20 , v = 500 /. B = 5*10-5 . , .
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16. d = 0,4 . ΔB = 127,4 Δt = 2 E = 200 . ?
, , .
17. , , . . h = 8 . , l = 80 .
18. T1 = 5 , T2 = 6 . ? .
19. , , n = 1,5. , , .
20. T = 2. , a = 2 /2?
21. . 14. ?
22. p1 , λ = 800 , p2 , ν = 1,5*1015 ? c = 3*108 /.
23. , , ν1 = 8*1014 , ν2 = 6*1014 , n = 3 . . ( h = 6,63*10-34 *.)
24. , , t = 1 N0 = 106 175*103 .
25. -. -?
:
ĸ . .