For work to be accomplished we must have (2 points) a)an action which causes movement and an opposite reaction. b)an action which causes no movement or reaction. c)a force and a movement in the opposite direction of the force. d)a force and a movement in the same direction as the force.

How many miles of calcium oxide will be produced when 1.6 miles of iron (iii) oxide react with calcium phosphate

The fact that the total amount of energy in a system remains constant is a(n)

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.