2. What is the kinetic energy of a photoelectrcn emitted from a cesium surface when the surface is illuminated with 400-nm light? PHYSICS DATA SHEET Constants Prefixes Used with SI Units Particles Acceleration Due to Gravity Exponential Charge Mass Near Earth....... lag| = 9.81 m/s2 Prefix Symbol Value Gravitational Constant .... G = 6.67 x 10-1 N.m2/kg2 atto ..... .. 10-18 Alpha Particle........ ......... +2e 6.65 x 10-2 kg Radius of Earth ... ........ l'e = 6.37 x 10 m femto ........... f.............. ... 10-15 Electron ...... 9.11 x 10-3 kg Mass of Earth............... Me = 5.97 x 1024 kg pico............ P........... 10-12 Proton ............ 1.67 x 10-27 kg Elementary Charge ........ e= 1.60 x 10-19 C nano............. n. .... . 10-9 Coulomb's Law Constant .. k = 8.99 x 109 N-m2/C2 Neutron...... 0 1.67 x 10-27 kg micro .......... H .... .. 10-6 Electron Volt .... .......... leV = 1.60 x 10-19 J milli........... m...........10-3 centi............. . C ..... ...10-2 First-Generation Fermions Index of Refraction of Air. n = 1.00 Charge Mass Speed of Light in Vacuum. c = 3.00 x 108 m/s deci............ d..........10-1 Electron ...... ~0.511 MeV/c2 Planck's Constant ...... h = 6.63 x 10-34 J.s deka ...coco..... da............10' h = 4.14 x 10- eV.s ~0.511 MeV/c2 hecto ....... h...... 102 Positron ..... ......... +le Atomic Mass Unit ........... u =1.66 x 102 kg kilo ........... K............. 103 Electron neutrino, V.......... 0