Two electrical particles have opposite charges. what type of force will they create?
a. no force
b. repulsion
c. attraction and repulsion
d. attraction

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

__can be defined as which velocity changes

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.