# exam3 - Physics 2020-002 Exam 3 Constants and Formulae G =...

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Physics 2020-002 Exam 3 Constants and Formulae G = 6 . 673 × 10 - 11 N m 2 / kg 2 h = 6 . 62620 × 10 - 34 J s c = 2 . 997925 × 10 8 m/s σ = 5 . 6696 × 10 - 8 W/(m 2 K 4 ) R = 6 . 96 × 10 8 m g = 9 . 80 m/s 2 I th = 1 . 00 × 10 - 12 W/m 2 I tp = 1.00 W/m 2 1 eV = 1 . 60219 × 10 - 19 J 1 T = 10 4 G 1 km = 10 3 m 1 nm = 10 - 9 m 1 min = 60 s 1 hr = 3600 s KE 1 2 mv 2 PE s = 1 2 kx 2 KE i + PE i = KE f + PE f E = KE + PE F s = - kx L = ( n/ 2) λ ( n = 1, 2, 3, . . . ) T = 1 /f = 2 π m/k T = 2 π L/g β = 10 log( I/I ) I = P / (4 πr 2 ) ω = 2 πf f n = nf 1 1 n = R A Z 2 /n 2 ν = c/λ L/L = ( R/R ) 2 ( T/T ) 4 F = σT 4 E = = hc/λ L = 4 πσR 2 T 4 v = (331 . 3 m/s) T/ 273 K = λ max = (2 . 897 × 10 - 3 m K) /T

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Physics 2020-002 Name: Exam 3A – 5 April 2010 . Part A: Hard Multiple Choice (10 points total, 2 points each, Circle Best Answer). 1. A photon has an energy of 0.512 eV. What is the wavelength of this photon? a) 91.22 nm b) 6563 ˚ A c) 1 . 24 × 10 5 m d) 2 . 58 × 10 14 ˚ A e) 2422 nm 2. A 26.8 cm long piano wire is oscillating at the second harmonic. What is the wavelength of this oscillation? a) 6.70 cm b) 13.4 cm c) 26.8 cm d) 53.6 cm e) 107 cm

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