PHY 1940 University Physics Midterm Exam - Spring 2010 Formulas and Constants - Prof. Qi L, Study notes of Physics

Download PHY 1940 University Physics Midterm Exam - Spring 2010 Formulas and Constants - Prof. Qi L and more Study notes Physics in PDF only on Docsity! FORMULA SHEET PHY 1940 UNIVERSITY PHYSICS MIDTERM EXAM, Spring 2010 Constants Speed of light in vacuum 8100.3 c m/s Free space permittivity 120 1085.8  C2/N-m2 Coulomb’s constant 9 0 100.9 4 1   ek N-m2/C2 The charge magnitude of an electron 191060.1 e C Prefixes for units and equivalent order of magnitude. m (mili) ~ 10-3;  (micro) ~ 10-6; n (nano) ~ 10-9; p (pico) ~ 10-12 ********************************************************** Formulas Speed of light fc  Speed of light in the medium medmed ncv / Snell’s law 2211 sinsin  nn  Thin lens equation fss 1 ' 11  ; magnification s s h h m o i ' Spherical mirrors 2 R f  Lens power in diopters cm)(in 100 meters)(in 1 ff  Speed of waves in strings  F v  , where  is the linear density Wave mathematics )sin()( 2 sin tkxAvtxAy         , kv / , and f 2 Doppler equation sound src v v f f   1 or fvv vv f srcsnd obssnd          Constructive interference path difference = m Destructive interference path difference = (m+1/2) Double slit interference, the bright fringes on the screen  md sin Single slit diffraction, the dark fringes on the screen  mw sin Diffraction gratings, the bright fringes on the screen  md sin , where Nd 1 Coulomb’s law rF ˆ2 21 r qq ke or 2 21 r qq kF e