FIGURE EX17.4 is a snapshot graph at t = 0 s of two waves moving to the right at 1.0 m/s. The string is fixed at x = 8.0 m. Draw four snapshot graphs, stacked vertically, showing the string at t = 2, 4, 6, and 8 s.

Week 5 Tuesday, September 20, 2016 11:13 AM Potentials and charged conductors ○ Vsurface= Wab=- PE All points on surface of charged conductor in electrostatic eq are at same potential Electric potential constant everywhere on surface and equal to inside value Eqiupotential surfaces- surface on which all points are at same potential V=Vb-Va=0 Wab= - PE=-q V=0 No work needed to move chrge at constant speed on equipot surface Electric field is perpendicular to equipot surface Equipot & EF lines Equipot- family of spheres centered on point charge Potential dec along direction of EF lines EF lines perpendicular to E pot