Aboy throws a pebble into the center of the pond. a floating leaf near the waters edge oscillates ( moves up and down ) two complete cycles in one second as water waves move past the leaf. the waters wavelength is 10 meters. what is the waves velocity?

Wave speed = (wavelength) x (frequency)
 
                    = (10 m) x (2 / sec)  =  20 m/s.

By the way . . .
  The water doesn't move past the leaf.  Only the wave does.

Iread this book last year so take this with a grain of salt.gene jumps from the tree to compete with finny due to the fact that gene is always trying to do better than finny. he is put under the grasp of peer pressure due to finny almost forcing him to do this. ever since he first jumped finny kept pressuring him to jump since he thought gene enjoyed jumping.rather than uses this answer you should probably just reread chapters 3-4