# Science 2013

## Lists of data, formulae and relationships

### Data

Name of constantSymbol and value
Gravitational contstant$G = 6.67 \times 10^{-11} \text{N m}^2 \text{kg}^{-2}$
Acceleration of free fall (close to earth)$g = 9.81 \text{m s}^{-2}$
Gravitational field strength (close to earth)$g = 9.81 \text{N kg}^{-1}$
Electronic charge$e = -1.60 \times 10^{-19} \text{C}$
Electronic mass$m_e = 9.11 \times 10^{-31} \text{kg}$
Electronvolt$1 eV = 1.60 \times 10^{-19} \text{J}$
Unified mass unit$u = 1.66 \times 10^{-27} \text{kg}$
Planck constant$h = 6.63 \times 10^{-34} \text{J s}$
Speed of light in a vacuum$c = 3.00 \times 10^{8} \text{m s}^{-1}$
Molar gas constant$R = 8.31 \text{J K}^{-1} mol^{-1}$
Boltzmann constant$k = 1.38 \times 10^{-23} \text{J K}^{-1}$
Avogadro constant$N_A = 6.02 \times 10^{23} \text{mol}^{-1}$
Permittivity of free space$\epsilon _{0} = 8.85 \times 10^{-12} \text{F} \text{m}^{-1}$
Permeability of free space$\mu _0 = 4\pi \times 10^{-7} \text{N} \text{A}^{-2}$

Read more...Published on 12th March 2013.

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