I'm really fired up about physics now. But I can't puzzle out the following: Q. When you float in fresh water, the buoyant force that acts on you is equal to your weight. When you float higher in the high-density water of Salt Lake, the B.F. that acts on you is actually: 1) greater than your weight, 2) equal to your weight, or 3) less than your weight. I am unsure about whether the buoyant force is affected by being something other than pure water. For example, if the buoyant force is the same no matter what liquid you are in, molasses or whatever, then I can say the answer is (2), equal. But, I have only examples of things floating in fresh water. Q. A wooden boat is floating in a pond. It has a large chunk of iron on it. If you throw the chunk overboard, what will the water level of the pond do? Fall, Rise, or Stay the Same? I say FALL, but I would like a formula or a formalized way to understand this. I think of it as the boat's footprint sinking down in the water when the chunk of iron is in the boat, and then the footprint is less when the chunk goes overboard, and the chunk being denser than the pond water, it isn't displacing as much as when it was part of the FOOTPRINT, and thus the water falls. But that's giving me a headache. Thanking you in advance for any help.