Astudent who weighs 500 newtons climbed the stairs from the first floor to the third floor,15 meters above, in 20 seconds. how much work did she do

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 "