Acharged solid aluminum ball hangs on an insulating wire. answer for the condition and field of the aluminum ball. condition: steady state / equilibrium / neither net electric field: zero field / nonzero and constant field / changing field

As seen in a us weather map, the h (or high) and l (or low) symbols indicate regions where surface air pressures are high or low, respectively, compared to surrounding areas. an h is plotted where the air pressure is highest and an l is plotted where the air pressure is lowest. proceeding outward and away from the center of a high pressure system, the air pressure "