study the image, which describes how rapid changes in weather conditions occur.

based on the arrows, what does the image represent?

1- air masses are barely moving.
2- air masses are colliding with each other.
3- jet streams are forming in the upper atmosphere.
4- weather conditions are remaining steady and
unchanged.

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.