There are many different ways to classify matter but one way to only use two categories for all matter. all matter can be classified as either

a) solids or liquid

b) mixtures or substances

c) atoms or molecules

d) elements or compounds

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

Most of the volume of an atom is occupied by the

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.