change of density

  1. Stevan Gvozdenovic

    Let's debunk my (very simple) perpetuum mobile

    I know there must be a flaw somewhere but I can't find it so let's do it together. It's based on changing density of object in water(or some other liquid for that matter). here you can see a bigger ball which, when empty, has less density than water and thus floats, but in this case it's...