, , , , . - .
, . ( ).
1954 . X (, , , , ) . , 1954 . , , (SI Systeme International). , , .
. 1.
1
m | |||
kg | |||
s | |||
. | |||
. - | |||
cd | |||
- | mol |
, , .
, 1/299792458 .
.
9192631770 , -133.
, , 1 , 1 , 210-7 .
1/273.16 .
, , -12 0.012 .
, 5401012 , 1/683 /.
.
() , . 5717'48".
|
|
(), , , , , .
Q = 2π(1cosα/2)
Q ; α , .
1 , 6532', π 120, 2π 180.
, . , ( , ..) (2π, π/2 ..).
, . , v = l / t.
( ) t, ( ), (/). , 1 1 .
, , . , - 2 , 1 /, 1 , √2 /. ( ).
.
. 2 .
2
1018 | |||
1015 | |||
1012 | |||
109 | G | ||
106 | |||
103 | k | ||
102 | h | ||
101 | da | ||
10-1 | d | ||
10-2 | c | ||
10-3 | m | ||
10-6 | |||
10-9 | n | ||
10-12 | p | ||
10-15 | f | ||
10-18 | a |
, , . , 1 ² 1 1000 , , , (1 = 1.000.000 ). , . , , .
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|
1 ² = (1 )² = (10³ ) ² = 106 ².