AS-Level & A-Level OCR 2025 Physics A Data, Formulae and Relationships Booklet

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AS-Level & A-Level OCRcxs
2025 Physics A Data, Formulae and
Relationships Booklet


AS Level Physics A (H156)
A Level Physics A (H556)

Data, Formulae and Relationships Booklet
Physics A




CST992
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Data, Formulae and Relationships
Data

Values are given to three significant figures, except where more – or fewer – are useful.

Physical constants


acceleration of free fall g 9.81 m s–2
elementary charge e 1.60 × 10–19 C
speed of light in a vacuum c 3.00 × 108 m s–1
Planck constant h 6.63 × 10–34 J s
Avogadro constant NA 6.02 × 1023 mol–1
molar gas constant R 8.31 J mol–1 K–1
Boltzmann constant k 1.38 × 10–23 J K–1
gravitational constant G 6.67 × 10–11 N m2 kg–2
permittivity of free space ε0 8.85 × 10–12 C2 N–1 m–2 (F m–1)
electron rest mass me 9.11 × 10–31 kg
proton rest mass mp 1.673 × 10–27 kg
neutron rest mass mn 1.675 × 10–27 kg
alpha particle rest mass mα 6.646 × 10–27 kg
Stefan constant σ 5.67 × 10–8 W m–2 K–4


Quarks


up quark charge = + 23 e
down quark charge = – 13 e
strange quark charge = – 13 e




© OCR 2025 Physics A