AS A Level Physics 9702 21 May June 2021 Paper 2.
Swayam Cambridge Inernational School
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AS A Level Physics 9702-21 Paper 2 May-June 2021 .
- Exam (elaborations) • 16 pages • 2022
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AS A Level Physics 9702-21 Paper 2 May-June 2021 . Data 
speed of light in free space c = 3.00 × 108ms−1 
permeability of free space μ0 = 4π × 10−7Hm−1 
permittivity of free space ε0 = 8.85 × 10−12Fm−1 
( 1 
4πε0 
= 8.99 × 109mF−1) 
elementary charge e = 1.60 × 10−19C 
the Planck constant h = 6.63 × 10−34 J s 
unified atomic mass unit 1u = 1.66 × 10−27 kg 
rest mass of electron me = 9.11 × 10−31 kg 
rest mass of proton mp =	1.67 × 10−27 kg 
molar gas constant ...
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