AS Physics data and formulae
For use in exams from the June 2016 Series onwards
Version 1.4 1
DATA - FUNDAMENTAL CONSTANTS AND VALUES
Quantity Symbol Value Units
speed of light in vacuo
𝑐
3.00
×
108
m s–1
permeability of free space
0
4
π
×
10–7
H m–1
permittivity of free space
0
8.85
×
10–12
F m–1
magnitude of the charge of electron
𝑒
1.60
×
10–19
C
the Planck constant
ℎ
6.63
×
10–34
J s
gravitational constant
𝐺
6.67
×
10–11
N m2 kg–2
the Avogadro constant
𝑁A
6.02
×
1023
mol–1
molar gas constant
𝑅
8.31
J K–1 mol–1
the Boltzmann constant
𝑘
1.38
×
10–23
J K–1
the Stefan constant
5.67
×
10–8
W m–2 K–4
the Wien constant
2.90
×
10–3
m K
electron rest mass
(equivalent to
5.5 × 10–4
u)
𝑚e
9.11
×
10–31
kg
electron charge/mass ratio
𝑒
𝑚e
1.76
×
1011
C kg–1
proton rest mass
(equivalent to
1.00728
u)
𝑚p
1.67(3)
×
10–27
kg
proton charge/mass ratio
𝑒
𝑚p
9.58
×
107
C kg–1
neutron rest mass
(equivalent to
1.00867
u)
𝑚n
1.67(5)
×
10–27
kg
gravitational field strength
𝑔
9.81
N kg–1
acceleration due to gravity
𝑔
9.81
m s–2
atomic mass unit
(
1
u is equivalent to
931.5
MeV
)
u
1.661
×
10–27
kg
ALGEBRAIC EQUATION GEOMETRICAL EQUATIONS
quadratic equation
a
acbb
x
2
4
2
−±−
=
arc length = r
circumference of circle = 2πr
ASTRONOMICAL DATA area of circle = πr2
Body Mass/
kg
Mean radius/
m
curved surface area of
cylinder
= 2πrh
Sun
1.99 × 1030
6.96 × 108
area of sphere = 4πr2
Earth
5.97 × 1024
6.37 × 106
volume of sphere =
3
4
πr3
