>> . . 10 .

5.

 


4

1. , ?

2. , .

3. , ?

4. , S = 20 2, h = 60 t = 27 . . m = 10 . Δ = 50 . ', . = 105 .

5. , , t = -23 m1 = 16 = 400 ? S = 200 2, 0 , m1 = 5 .

6. = 4000 . Q1, . = 21 /( ).

7. t0 = 0 , t1 = 300 , t = 23 . V = 10 ; S = 20 2. l. ρ = 8,9 103 /3. = 4,19 103 /( ), = 380 /( ). , .

8. = 63 / m1 = 250 t1 = 12 . m2 = 500 t2 100 t = 33 . 1 ? 2 = 380 /( ).

9. , h = 500 , υ = 50 /. ? , , , . = 460 /( ).

10. , m. , .

11. , υ = 100 /, . , 50% ?

12. (. 5.22). , . , . . , . ?

13. m = 2 . Δ = 5 Q1 = 9160 . , , .

14. m = 0,2 t1 = 20 . , , ' = 4470 . . cV = 745 /( ).

15. , V = 3 , Δ = 2,2 . , , , , .

16. t = 17 = 100 . V = 3 . Δt = 100 . . ?

17. 1 2 (V2 < V1), 3 1. ? ? V.

18. , V1 = 1 = 105 , V2 = 2 . 2 . V3 = 4 . V , , , .

19. V1 = 10 p1 = 100 1 = 300 . 2 = 320 , 3 = 350 (. 5.23). , , 1 3.

20. , W τ, 0 m t. , ?

21. 67% , . 2 , T1 = 430 .

22. , Q1 = 103 1 = 1000 ? () 2 = 293 .

23. , V = 200 t1 = 7 t2 = 47 . , t2 t1, m = 4,2 104 = 10 . . ρ = 103 /3. g ≈ 10 /2.

 

 

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