Internal Gravity Wave

Human-powered apparatus

In experiment no. 1, we used a stepping motor to raise and lower the round stick. In experiments 2 and 3, modifying the movement apparatus was too much trouble, so we used manpower instead. We kept time by matching the movement with "Bip, Bip" noises made by the timer, and it actually worked out better than we thought.

Sugar water is no good?

The refractive index of sugar water is higher than that of salt, and more sugar will dissolve in the same amount of water, making it possible to obtain a higher specific gravity. These sounds good for this experiment, but it has a fault. The sugar solution has heigh viscosity. It won't flow in a hose like pure water meaning that it takes a long long time to fill up the tank. Only one who dit it knows.