Assess Your Understanding Calculate You push on a desk with a force of
120 N to the right. Your friend pushes on the
same desk with a force of 90 N to the left.
What is the net force on the desk?

Secondary pollutants are more harmful than primary pollutants. select the best answer from the choices provided ot of

What re the two main phrases of the cell cycle.

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h, o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.