A planet and moon are a distance 2r from each other, as seen below. The moon has mass 3m, and the planet has mass 4m. What is the gravitational potential energy of the moon planet system?

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 "