Astraight, horizontal length of copper wire has a current i=28a through it. what are the magnitude and direction of the minimum magnetic field b needed to suspend the wire(to balance the gravitational force on it) if the linear density of the wire is 46.6g/m?

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 "