After the experimentation, you may ask yourself “Why did all of these spheres fall at a different rate when Galileo said that objects fall at the same rate (in a vacuum)?” The reason why the objects fell at a different rate in the fluids given was because the fluid’s viscosity varies. The viscosity of a fluid can impact an object that you drop into it, because there’s a resistance of some sort impacting the rate of which they fall. For example, when both spheres were dropped at the same time into a graduated cylinder of water, the steel sphere hit the bottom of the graduated cylinder before the glass sphere, because the viscosity of water is low. The viscosity of water is very dynamic based on the temperature, but both of the spheres were denser