What is the variable, or the factor that changes, in the experiment? a. the number of strokes b. the size of the balloon c. the material the balloon sticks to d. the material the balloon is rubbed on

How has the elimination of trade barriers affected the movement of goods among member countries of the european union? a. member countries are able to produce all the goods they need. b. goods can move freely among member countries. c. member countries no longer need to trade with countries outside the eu. d. larger countries are able to import more goods than smaller ones.

The biggest component / ingredient of summer time smog is

From where do ocean waves obtain their energy