275w09exameqn - PHYS275-W09 Physical Constants Speed of...

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PHYS275-W09 Constants and Equations March 6,2009 Physical Constants: Speed of Light c = 3 . 00 × 10 8 m/sec Gravitation constant G = 6 . 67 × 10 - 11 N m 2 kg - 2 Planck’s constant h = 6 . 63 × 10 - 34 J sec Boltzmann’s constant k = 1 . 38 × 10 - 23 J K - 1 = 8 . 62 × 10 - 5 eV K - 1 Stefan’s Law constant σ = 5 . 67 × 10 - 8 J m - 2 s - 1 K - 4 Mass of hydrogen atom m H = 1 . 67 × 10 - 27 kg Mass of electron m e = 9 . 109 × 10 - 31 kg Rydberg constant R H = 1 . 09677 × 10 5 cm - 1 1MTon of TNT 4 . 2 × 10 15 J = crater 1km in diameter Astronomical Constants: Astronomical unit 1 AU = 1 . 50 × 10 11 m Light year 1ly = 9 . 4605 × 10 15 m Parsec 1 pc = 3 . 09 × 10 16 m = 206265AU Sidereal Year 1yr = 3 . 156 × 10 7 s Day 1d = 8 . 64 × 10 4 s Earth mass M = 5 . 974 × 10 24 kg Earth radius R = 6 . 378 × 10 6 m Mass of Earth’s Moon M Moon = 7 . 349 × 10 22 kg Radius of Earth’s Moon R Moon = 1 . 738 × 10 6 m Solar mass M = 2 . 0 × 10 30 kg Solar radius R = 7 . 0 × 10 8 m Solar luminosity L = 3 . 86 × 10 26 J/sec Solar effective temperature T = 5770 K Miscellaneous: Approximate density of waterice: 900 kg/m 3 Approximate density of silicate rock: 3500 kg/m 3
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