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Constants
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Physics
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290
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Astronomical
Electricity
ElectroMagnetism
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Gravitational
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Physical-Chemical
Subatomic Particles
Universal
NAME
SYMBOL
VALUE
Thomson Cross Section
σ
e
0.665245854(15) × 10
-28
m
2
Time, Planck l
P
/c = (ħG/c
5
)1/2
t
P
5.3906(40) × 10
-44
s
Ton, UK, per 1000yd
1.111 kg m
-1
Ton, UK, per Mile
0.6313 kg m
-1
UK Electrical Power Specification
230V ac, 50Hz
UK Ton per 1000yd
1.111 kg m
-1
UK Ton per Mile
0.6313 kg m
-1
US Electrical Power Specification
115V ac, 60Hz
Volume, Molar (Ideal Gas) (T=273.15 K, p=101.325 kPa)
V
m
22.413996(39) × 10
-3
m
3
mol
-1
von Klitzing Constant h/e
2
= µ
0
c/2α
R
K
25812.807572(95) Ω
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