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Ee |
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Symbol |
Value |
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e |
e |
2.7182818284590452353602874713526 |
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Earth's Average Density |
|
5.517 × 103 kg m −3 |
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Earth's Average Radius |
R |
6.37 × 106 m |
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Earth's Magnetic Field, Horizontal Component of |
B0
|
1.8 × 10 −5 T
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Earth's Mass |
M |
5.972 × 10 24 kg |
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Earth-Moon Mean Distance |
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3.844 × 10 8 m |
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Effective temperature of the Sun |
|
5780 K |
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Electric Constant (1/µ0 c 2 ) |
εp |
8.854187817 × 10 −12 F m −1
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Electric Constant Permittivity of free space |
ε0 |
8.854 187 817 × 10 −12 F m −1
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Electrical Power Specification (UK) |
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230V ac, 50Hz |
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Electrical Power Specification (US) |
|
115V ac, 60Hz |
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Electron Charge |
e |
1.602 176 462 ± 0.000000063 × 1019 C |
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e/h |
2.417 989 491 ± 0.000 000 095 × 10 14 A J−1 |
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Electron Charge to Mass Quotient |
−e/me |
−1.758 820 174 ± 0.000 000 071 × 10 11 C kg −1 |
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Electron g-factor
Landé g-factor |
ge |
−2.002 319 304 3737 ± 0.000 000 000 0082 |
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Electron Gyromagnetic Ratio |
γe |
1.760 859 794 ± 0.000 000 071 × 10 11 s −1 T −1 |
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γe/2π |
28024.954 0 ± 0.001 1 MHz T −1 |
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Electron Magnetic Moment |
μe |
−928.476 362 ± 0.000037 × 10 −26 J T −1 |
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Electron Magnetic Moment Anomaly |
ae |
1.159 652 1883 ± 0.000 000 0042 × 10 −3 |
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Electron Mass |
me |
9.109 381 88 ± 0.000 000 72× 10 −31 kg
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5.485 799 110 ± 0.000 000 0 12 × 10−4 u |
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8.187 104 14 ± 0.000 000 64 × 10−14 J/ c2 |
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0.510 998 902 ± 0.00 000 021 MeV/c2 |
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Electron Molar Mass |
M(e) |
5.485799110 ± 0.000000012 × 10−7 kg mol−1 |
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Me |
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Electron Radius, Classical |
re |
2.817940285 ± 0.000000031 × 10 −15 m |
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Electron Specific Charge |
−e/me |
−1.758819 ± 0.000062 × 10 11 C kg−1 |
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Electron to Shielded Helion Magnetic Moment Ratio (gas, sphere, 25°C) |
μe/μ'h
|
864.058 255 ± 0.000 010
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Electron to Shielded Proton Magnetic Moment Ratio (H2O, sphere, 25°C) |
μe/μ'b
|
−658.227 5954 ± 0.000 0071 |
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Electron-α-Particle Mass Ratio |
me/mα |
1.3709335611 ± 0.000000029 × 10 −4 |
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Electron-Deuteron Magnetic Moment Ratio |
μe/μd |
−2143.923 498 ± 0.000 023 |
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Electron-Deuteron Mass Ratio |
me/md |
2.724 437 1170 ± 0.0000000058 × 10 −4 |
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Electron-Muon Magnetic Moment Ratio |
μe/μμ |
206.766 9720 ± 0.000 0063 |
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Electron-Muon Mass Ratio |
me/mμ |
4.836 332 10 ±0.000 000 15 × 10 −3 |
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Electron-Neutron Magnetic Moment Ratio |
μe/μn |
960.920 50 ± 0.000 23 |
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Electron-Neutron Mass Ratio |
me/mn |
5.438 673 462 ± 0.000 000 012 × 10 −4 |
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Electron-Proton Magnetic Moment Ratio |
μe/μp |
−658.210 6875 ± 0.000 0066 |
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Electron-Proton Mass Ratio |
me/mp |
5.446 170 232 ± 0.000 000 012 × 10 −4 |
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Electron-Tau Mass Ratio |
me/mτ |
2.875 55 ± 0.000 47 × 10 −4 |
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Electronvolt |
eV |
1.602 177 33 × 10 −19 J |
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Electronvolts, Million |
MeV |
1.6 × 10 −13 J |
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Elementary Charge |
e |
1.602 176 462 ± 0.000 000 63 × 10−19 C
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e/h |
2.417 989 491 ± 0.000 000 095 × 10 14 A J −1 |
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emf of Daniell Cell |
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1.08 V |
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emf of Lechlanché Cell |
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1.46 V |
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emf of Nife Cell |
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1.40 V |
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EMF of Weston standard cell |
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1.018 636 V at 20°C |
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Energy Production, Sun's |
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3.90 × 10 26 W |
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Energy, Hartree |
Eh |
4.359 743 81 ± 0.000 000 34 × 10−18 J
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27.211 3834 ± 0.000 0011 eV |
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Engineer's chain |
|
100 ft 30.48 m |
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Enthalpy of vapourisation of Water |
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43.990 × 103 J mol−1 at 25°C |
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Erg |
erg |
10−7 J |
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Euler's Constant |
γ |
0.57721566490153286061 |
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C |
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Ee | Ff
To the top |
To the bottom
A to B | C to D | E to F | G to I | J to L | M | N to Q | R to T | U to Z
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Ff |
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Symbol |
Value |
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Face Cord |
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64 ft3 0.5 cord 1.812 278 181 888 m3 |
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Faraday Constant |
F |
96485.3415 ± 0.0039 C mol −1 |
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Fathom |
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2 yd 1.8288 m
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Feigenbaum's Constant |
σ |
4.669210609102990 |
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Fermi |
|
10−15m |
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Fermi's Constant |
GF/(ħc)3 |
1.166 39 ± 0.000 01× 10−5 GeV−2 |
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Fine Structure Constant |
α |
7.297 352 533 ± 0.000 000 027 × 10 −3 |
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First Radiation Constant |
c1 |
3.741 771 07 ± 0.000 000 29 × 10 −16 W m 2 |
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First Radiation Constant for Spectral Radiance 2hc 2 |
c1L |
1.191 042 722 ± 0.000 000 093 × 10 −16 W m 2 sr−1 |
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Fluid dram, UK |
fl dr |
0.125 fl oz
3.551 631 25 × 10−6m3 |
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Fluid dram, US |
fl dr |
0.125 fl oz (US) 3.696 6875 × 10−6m3 |
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Fluid Ounce, UK |
fl oz |
0.05 pint 2.841 305 × 10 −5 m 3 |
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Fluid Ounce, US |
fl oz |
0.006 25 lq pt 2.957 35 × 10−5m3 |
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Foot |
ft |
12 in 0.3048 m |
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Foot, Board (Timber) |
fbm |
144 in3
2.359 737 216 × 10-3 m3 |
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Foot, cube |
ft3 |
2.8316846592 × 10 −2 m 3 |
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cu. ft. |
1728 in 3
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Fransén-Robinson Constant |
|
2.8077702420 |
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Free Neutron, Half-life of |
T |
650 s
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Free Space, Permeability of |
μ0 |
4π × 10 −7 N A −2
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12.566370614 × 10 −7 N A −2 |
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Free Space, Permittivity of |
ε0 |
8.854187817 × 10 −12 F m −1 |
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Furlong |
ft |
220 yd 201.168 m |
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Ee | Ff
To the top
A to B | C to D | E to F | G to I | J to L | M | N to Q | R to T | U to Z
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