pracfinal

# pracfinal - Physics 273 Practice Final Exam Fall 2011 Prof...

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Elementary charge e = 1 . 6 × 10 19 C 1 electron volt ( eV ) = 1 . 6 × 10 19 J Speed of light c = 3 × 10 8 m/s Planck’s constant h = 6 . 63 × 10 34 J · s = 1240 nm · eV/c ¯ h = h/ 2 π Avogadro’s number = 6 . 02 × 10 23 molecules/mole Electron mass = 9 . 11 × 10 31 kg = 0 . 511 MeV/c 2 = 0 . 000549 u Proton mass = 1 . 673 × 10 27 kg = 938 . 3 MeV/c 2 Neutron mass = 1 . 675 × 10 27 kg = 939 . 6 MeV/c 2 = 1 . 008665 u Hydrogen atom mass = 1 . 007825 u Atomic mass unit 1 u = 931 . 5 MeV/c 2 Fine structure constant α = 1/137 Hubble constant H = 0 . 0215 m/s/lightyear = 70 km/s/Mpc 1 parsec ( pc ) = 3.26 light years Powers of ten: femto(f) pico(p) nano(n) micro( μ ) milli(m) 10 15 10 12 10 9 10 6 10 3 centi(c) kilo(k) Mega(M) Giga(G) Tera(T) 10 2 10 +3 10 +6 10 +9 10 +12 THE LEPTONS (all spin 1 2 ) Mass (MeV) Common decays L e L μ L τ Antiparticle e ( . 511) Stable 1 0 0 e + ν e (0?) Stable (?) 1 0 0 ν e μ (106) e ν e ν μ 0 1 0 μ + ν μ (0?) Stable (?) 0 1 0 ν μ τ (1777) π π 0 ν τ , e ν e ν τ , μ ν μ ν τ 0 0 1 τ + ν τ (0?) Stable (?) 0 0 1 ν τ THE QUARKS (all spin 1 2 ) Baryon number = +1 /
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