Aball sits on top of a hill. the wind blows and the ball begins rolling down the hill. what caused the ball to start moving?

a. the wind created an unbalanced force on the ball.
b. the wind stopped all other forces acting on the ball.
c. all forces acting on the ball became equal and balanced.
d. all forces acting on the ball moved in the same direction.

Which statement best describes how atoms combine to form sodium chloride (nacl)? a. a positively charged sodium ion and a positively charged chlorine ion form an covalent bond. b. a positively charged sodium ion and a negatively charged chlorine ion form an covalent bond. c. a positively charged sodium ion and a positively charged chlorine ion form an ionic bond. d. a positively charged sodium ion and a negatively charged chlorine ion form an ionic bond.

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?

Choose all the answers that apply. as ocean depth increases, temperature decreases temperature increases pressure increases pressure decreases salinity increases density increases