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Data Sheet - A-Levels Physics

The value of the following constants will be provided in each examination paper.

Physical Constants Values

Physical Constants

Acceleration of free fall (close to Earth's surface)
g=9.81 m s−2\boldsymbol{g = 9.81\ \text{m}\ \text{s}^{-2}}
Boltzmann constant
k=1.38×10−23 J K−1\boldsymbol{k = 1.38 \times 10^{-23}\ \text{J}\ \text{K}^{-1}}
Coulomb law constant
k=14πε0=8.99×109 N m2 C−2\boldsymbol{k = \frac{1}{4\pi\varepsilon_0} = 8.99 \times 10^9\ \text{N}\ \text{m}^2\ \text{C}^{-2}}
Electron charge
e=−1.60×10−19 C\boldsymbol{e = -1.60 \times 10^{-19}\ \text{C}}
Electron mass
me=9.11×10−31 kg\boldsymbol{m_{\text{e}} = 9.11 \times 10^{-31}\ \text{kg}}
Electronvolt
1 eV=1.60×10−19 J\boldsymbol{1\ \text{eV} = 1.60 \times 10^{-19}\ \text{J}}
Gravitational constant
G=6.67×10−11 N m2 kg−2\boldsymbol{G = 6.67 \times 10^{-11}\ \text{N}\ \text{m}^2\ \text{kg}^{-2}}
Gravitational field strength (close to Earth's surface)
g=9.81 N kg−1\boldsymbol{g = 9.81\ \text{N}\ \text{kg}^{-1}}
Planck constant
h=6.63×10−34 J s\boldsymbol{h = 6.63 \times 10^{-34}\ \text{J}\ \text{s}}
Permittivity of free space
ε0=8.85×10−12 F m−1\boldsymbol{\varepsilon_0 = 8.85 \times 10^{-12}\ \text{F}\ \text{m}^{-1}}
Proton mass
mp=1.67×10−27 kg\boldsymbol{m_{\text{p}} = 1.67 \times 10^{-27}\ \text{kg}}
Speed of light in a vacuum
c=3.00×108 m s−1\boldsymbol{c = 3.00 \times 10^8\ \text{m}\ \text{s}^{-1}}
Stefan-Boltzmann constant
σ=5.67×10−8 W m−2 K−4\boldsymbol{\sigma = 5.67 \times 10^{-8}\ \text{W}\ \text{m}^{-2}\ \text{K}^{-4}}
Unified atomic mass unit
u=1.66×10−27 kg\boldsymbol{u = 1.66 \times 10^{-27}\ \text{kg}}