De 570 PMark for Review
16 A large rock is motionless on a flat sidewalk. Which statement best explains why the rock remains
motionless?
F)
There are no forces acting on the rock.
The only force acting on the rock is directed toward the sidewalk.
H)
The forces acting on the rock are all balanced.
J)
The sidewalk exerts an unbalanced force on the rock.

Which best describes how johannes kepler developed his laws of planetary motion

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion