A water wave spreading out in a circle across the surface of a ...

[formula1]

A water wave spreading out in a circle across the surface of a pond is an example of
 
  A) a two-dimensional wave.
  B) witchcraft.
  C) a one-dimensional wave.
  D) particle motion, or mass motion, rather than wave motion.
  E) a three-dimensional wave.

Question 2

A girl lifts a ball by means of a string attached to the ball. The string exerts a 20 newton force on the ball. The ball weighs 8 newtons. The net force on the ball is
 
  A) zero. B) 28 newtons. C) 12 newtons. D) 20 newtons. E) 8 newtons.

[rleezy04]

Answer to Question 1

A

Answer to Question 2

C