PHYSIC AL CONSTANTS CONSTANT Speed of light Elementary charge Electron mass Proton mass Gravitational constant Permeability constant Permittivity constant Boltzmann’s constant Universal gas constant Stefan–Boltzmann constant Planck’s constant Avogadro’s number Bohr radius SYMBOL c e me mp G m0 P0 k R s h 15 2p"2 NA a0 THREE-FIGURE VALUE 3.003108 m/s 1.60310219 C 9.11310231 kg 1.67310227 kg 6.67310211 N # m2/kg 2 1.2631026 N/A2 1H/m2 8.85310212 C 2/N # m2 1F/m2
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grammerFrench Grammar and Usage French Grammar and Usage Second edition Roger Hawkins Senior Lecturer in Language and Linguistics, University of Essex Richard Towell Professor of French Applied Linguistics, University of Salford NATIVE SPEAKER CONSULTANT Marie-Noëlle Lamy Senior Lecturer, Open University A member of the Hodder Headline Group LONDON Contents Guide for the user Glossary of key grammatical terms Acknowledgements Acknowledgements for the second edition xi xiv
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