Charge above a conducting plane a positive point charge q ia fixed at the point (0,0,z0) above a grounded conducting plane at z = 0. (a) what is the total charge induced on the plane? (b) determine the radius of the circle centered at the origin in the xy plane which enclose half of the total charge induced on the plane. (c) determine the force on the charge. (d) determine the energy in the electric field. how does this compare with the energy of two charges +q and −q at a separation of 2z0.

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.