1. .
400 . 112 . , . , . 30 . , 5-7 ( 33-35 )
, - 400 - 100%,
- 112 % , = 112/400 100 = 28 %
| , | |||
| % | |||
| 8 | |||
| 1 | |||
| 2 | |||
| 7 |
_____________
2)
2.
: :
- -
3.
( 9). . 58, 59. , .
. . ( 1000 3), . , . . () :
= (m1 m2) /V, (/3)
m1 - ; m2 ; V = 1000 3.
1.
9.1 ( , 9).
1
| , 3 | , | () | ||||||
| , m2 | , m1 | /3 | /3 | |||||
5.
50 , 008. . 0,1 %. > 15 %.
2.
9.2 ( , 9).
2
| , | , | , | , % | |
6. :
|
|
|
) R .. 28
R = 3 ∙ F∙ l /2bh2 (/2)
:
.
| l, | b, | h, | F , | R | R , | ||
| /2 | |||||||
| ( )R () | |||||||
R =F / (/2), (2)
:
. , 9.3
| , | - , 2 | F , | R | R ,, | |||
| =L/2 | b | /2 | |||||
| ( ) - R ) | |||||||
:
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___________________________________
_________________________________________________
() ____________
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1. ?
2. ?
3. ? .
4. , . ?
5. .
7. , .
