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- Air, average molecular weight of
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- 29 g / mol
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- Air, density of
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- 1.293e-3 g/cm3
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- Avogadro's number
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- 6.02251367e23 /mol
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- Boltzmann constant
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- 1.380658e-23 J / K
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- Earth, mass of
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- 5.9742e24 kg
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- Earth, radius of
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- 6.378140e6 m
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- Electron, mass of
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- 9.1093897e-31 kg
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- Elementary charge
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- 1.60217733e-19 C
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- Gravitational constant
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- 6.67259e-11 n m2 / kg2
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- Hydrogen atom, mass of
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- 1.6735340e-27 kg
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- Light, speed of
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- 299792458 m /s
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- Neutron, mass of
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- 1.6749286e-27 kg
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- Permittivity of free space (vacuum)
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- 8.857187817e-12 F / m
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- Planck's constant
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- 6.6260755e-34 J / Hz
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- Proton, mass of
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- 1.6726231e-27 kg
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- Rydberg constant
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- 1.0973731534e7 m
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- Solar constant
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- 1368 W /m2
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- Stefan-Boltzmann constant
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- 5.67051e-8 W / m2 K4
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- Sun, luminosity of
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- 3.827e26 W
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- Sun, mass of
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- 1.9891e30 kg
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- Sun, radius of
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- 6.96e8 m
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- Universal gas constant
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- 8.314 m3 Pa / mol K
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- Water, critical point of
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- 374.3 degrees Celsius at 218 atm
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- Water, density of
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- 1 g / cm3
- 1000 kg / m3
- 62.174 lbm / ft3
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- Water, heat of fusion of
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- 3.3375e5 J / kg
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- Water, Kf for
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- 1.86 degrees Celsius Kg water / mol solute
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- Water, triple point of
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- 4 degrees Celsius at 0.01 atm
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- Year, sidereal
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- 365.256366 days
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