I'd like to know the formula to use also. thank you!
2006-07-26 13:31:23 · 2 answers · asked by MelBelle 2 in Science & Mathematics ➔ Physics
omg please answer. it's killin me!
2006-07-26 14:37:19 · update #1
This is a question about Archimedes's buoyancy principle. Imagine the force on any piece of your mystery liquid. It's not moving anywhere, so the weight of the liquid must exactly cancel with the upward force on it. Now empty that region of liquid--make a bubble with nothing in it. Then the bubble will have a net upward force on it--the buoyancy. If that region were filled with something--say air, or milk, or wood--the net upward force is reduced by the weight of the material filling the bubble.
As for your problem: since the block is floating, the net upward force must exactly balance the weight of the block. But the net upward force must have exactly canceled the weight of the displaced mystery liquid, too. So the weight of the block must exactly equal the weight of the liquid it displaced. From this info, you can calculate the density of the liquid (remember density=mass/volume).
2006-07-26 15:50:31 · answer #1 · answered by Benjamin N 4 · 3⤊ 0⤋
Density equals mass over volume. But I think that's only for liquids. If used, then .... I don't know the answer anyway.
2006-07-26 22:48:24 · answer #2 · answered by Ian D 2 · 0⤊ 0⤋