It's total kinetic energy
The answer is energy.
Waves in the ocean are energy travelling along water.
Waves do not transport mass, they transport energy, this is the ability to perform work or exert force and distant points.
Although water seems to be travelling along with the wave, the molecules of water only move up and down; they do not travel along with the wave.
You have to decrease the length of the pendulum by 4 times in order to make the clock go 2 times faster
