A student slides a book over two different surfaces. First, she slides the book across a desk. Next, she slides the same book on the carpet. She exerts the same force onto both books. Which surface would cause a greater change in the velocity of the book? Explain your answer. A. Desk
B. Carpet
C. The change would be the same

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

Air can be considered a mixture. which statement does not explain why?