Why does the buoyancy effect an egg in the water?

Answer 1

Let's take a walk and talk about this. The force of buoyancy affects everything in the water. It affects a brick. But the force of buoyancy isn't enough to keep the brick afloat. But a brick weighs less under water than it does in air. Take the volume of the brick, take an equal volume of water, weigh the water, subtract the weight of that water from the weight of the brick in air, and you'll end up with the weight of the brick in the water. This is buoyancy in action. The brick weighs less because the water is pushing around it on all sides, but particularly from the bottom. This is true of all objects that sink. Like your egg, for example. It you have a "normal" egg, that is. Do an experiment. Take a bowl of water large enough to hold something like, say, a cantaloupe. Fill it nearly full of water and leave it in the sink. Hold an egg in the palm of your hand, and hold your hand over the bowl. Note the "weight" of the egg. That is, feel how heavy it is in your hand. Now lower your hand into the water. The egg will feel noticeably lighter. That's because the water is acting on the egg to buoy it up, or push it to the surface. That's buoyancy. The egg, however, is just a bit more dense that the same volume of water, so the egg will sink. But the egg weighs very little underwater compared to what it weighs in air. You can feel how light it becomes when you lower your hand into the water. That's buoyancy affecting the egg. For the most part, liquids all try to push whatever is put into them out. Objects less dense than the liquid will float. Those that are more dense will sink, but will weigh less under water because of buoyancy. Buoyancy is the force equal to the weight of the water displaced by an object that is submerged.