Recent content by Jguth

i need to prove density of rock=(wt in air/ wt in air-wt in water)*density of water

I know all that, i know the density of the rock and everything, i just need to prove the formula (show why it works)

I tryied but failed miserabely, i need to prove this formula! Archimedes (Buoyant force) Lets say that a rock is attatched to a string, the string has a tention of 5.0N out of the water, and has a tention of 3.2N submerged in water. Now to find the density of the rock, the formula used...