four equal point charges of +3.0uC are placed at the four corners of a square that is 40cm on a side. Find the force on any one of the charges​

Name the non metal condut electricity

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.