(. 1.2). :
, .. ;
- (), .. , , ;
- .
, ,
1/299792458 .
, .
,9192631770 , 133.
. , , , 1 , 1 , 2⋅10−7 .
1.2.
- | ||||||
- | ||||||
L | m | |||||
M | kg | |||||
T | s | |||||
I | A | |||||
Q | K | |||||
N | Mol | |||||
J | Cd | |||||
- | rad | |||||
- | sr |
, ,
1/299792458 .
, .
,9192631770 , 133.
. , , , 1 , 1 , 2⋅10−7 .
|
|
,1/273,16 .
. , 540⋅1012 ,
1/683 / .
. , , 0,012 12.
, .
, , l, ( ), r α = l / r. , .
, , (1 = 5717′44,8″. α α α = 180⋅α /π.)
Ω − , ; S, ( ) r
Ω = S / r 2.
− , , , , .
α
Ω = 2π[1−cos(α/2)].
1 65 32′;
π − 120; 2π − 180.
. . , . . ( , ).
(1.2) ..
[ Q ] = α⋅ β⋅ γ .
: , , , . : H, , , . . , .
. ,
0,1 103. , l = 5,6⋅10− 5 = 0,056 = 56 = 56000 l = 56.
|
|
.
- . dim (v) = L ⋅ T −1, v = dl / dt. [ v ] = ⋅−1-
(/).
- . a = dv / dt, dv (/) dt (c). [ a ] = ⋅−2 (/2) dim (a) = L ⋅ T −2.
- . F = ma. [ F ] =
⋅⋅−2 = 1 H (). dim (F) = L ⋅ M ⋅ T −2.
- . A = Fl. [ A ] = H ⋅= 1
(). dim () = L 2⋅ M ⋅ T −2.
- d I d Ω d = I ⋅ d Ω. dim () = J; [ ] = ⋅ (⋅). .
- , d, , dA E
= d / dA. dim (E) = L −2⋅ J; [ E ] = / 2. (). 12 1.
1. 3. .
1018 | E | |||
1015 | P | |||
1012 | T | |||
109 | G | |||
106 | M | |||
103 | k | |||
102 | h | |||
101 | da | |||
10-1 | d | |||
10-2 | c | |||
10-3 | m | |||
10-6 | μ | |||
10-9 | n | |||
10-12 | p | |||
10-15 | f | |||
10-18 | a |
. , = π⋅τ⋅ L ⋅ A ⋅ sin 2 u, τ - , L -
, A - , u - , D - .
π, τ, sin u ,
dim = dimL ⋅ dimA.
L = I / (S ⋅ cosϕ), I - , S - , ϕ - .
dimL = dimI / dimS.
, dimI = J. dim S = L 2, dimL = L -2 J. , dimA = L 2,
dim = L -2 J × L 2= J.
, , , , , .. .