How does a magnet exert a force without touching another object?
Magnets create a field of influence that
attracts or repels magnetic objects.
Magnets physically make objects move.
Someone must make a magnet force stuff
to move.

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.