why do eggs float by adding salt to water?
607170
Something floats if the weight of the volume of liquid displaced is higher than the weight of the object.  This means that three things are important in determining whether your egg floats or not, the weight of the egg, the volume of the egg, and the weight of the water that the egg displaces.  In your experiment, the weight of the egg didn't change.  Nor did the volume of the egg.  That means that you were changing the weight of the water displaced!  Salt water is heavier than fresh water.  The more salt you added, the more dense the water got.  (Density is weight divided by volume, so when we say something is more dense, it means that a fixed volume is heavier.)  When the density of the water got high enough that the water displaced by the egg weighed more than the egg, the egg started to float.  I need to know more about your experiment to help you with a chart, but you probably need to have the amount of salt added on the X axis  and whatever you were measuring on the Y axis.  Since sea salt and table salt have the same effect on water, you should expect the results to be similar.
84665
Air bubbles float up in water due to buoyancy because they displace the weight of water equal to their volume.  Water pressure is greated at greater depths therefore there is slightly more hydraulic pressure upwards on the bottom of the bubble than downwards on the top and the bubble is pushed upwards.  As the air bubble rises the pressure is reduced allowing the bubble to grow and it increases in volume and buoyancy as it travels to the surface.  This effect can also release and grow excess nitrogen in the blood of a diver causing growing nitrogen bubbles that cause great pain or even death and is called the bends (occurring especially in large joints that bend).\n\nOf course, soap bubbles float up in air due to air currents.  In a still room they float down to the floor and pop!
380798
I think you mean, "Why don't rotten eggs sink?"\n\nThere's more gas in it because the thing inside decayed, meaning it gives of gas and becomes smaller in size. But since it is inside the egg, there is no way out for the gas, so it stays inside the egg and makes the egg float when placed in water, just like a balloon filled with air.
49373
When you put an object in water--or any other fluid that is minimally compressable, like milk or oil or alcohol--the object takes up space.  Especially for fluids that are very runny--like water, in contrast to, say, old crank-case oil--the fluid will fill every nook and cranny available.  Since the water, or other non-compressable fluid, has to move out of the way for the object put in it, the apparent rise in the total volume of water-plus-object is due to the volume of the object.\n\nOf course, if the object FLOATS in water, you're in a whole new situation: the object will displace (move aside) exactly the amount of water that weighs what the object does.  That's a whole different discussion!
108792
They are made of wood, which floats because it has a lower density than water.  If you made a ship out of solid gold, it would sink, for example.
100455
Here's the thing: \nAdding salt to water actually increases the boiling point of water, so depending on how much salt you use, your boiling point of salt water could be something like 105 degrees celsius instead of 100.  Boiling point raising is an example of a colligative property, which is a property that is not dependent on what kind of particles you're using, just how many particles there are.  So if you added more salt, the water's boiling point would be higher.  \n\nThat means that your water would have to be at a higher temperature to boil.  This means that reasonably, it would take longer for you to get your water to that higher temperature, but not by a lot.  It would be roughly the same amount of time.  \n\nThe trick, though, is that because your water is boiling at a higher temperature, whatever you're cooking in that water is going to cook faster.  You're cooking it at 105 degrees instead of 100, so whatever you're cooking in the water will be done faster.  That's probably what your high school chemistry teacher meant.
58571
That depend upon what do you mean by float.  If you want the top of the egg to just barely stick out of the water solution then you only need to make the water slightly more dense than the egg.\nThe density of both the yolk and white is about 1.035, but this is only 89% of the total.  Most of the remaining 11% is the shell (which is mostly calcium carbonate) with a density of about 2.8 grams per cubic centimeter.  If you do the math and then convert into regular measurements, it comes out about 4 tablespoons per cup of water to get an egg to just float.  Adding more salt will make the egg float higher.  The upper limit of salt addition seems to be about 7 ½ or 8 tablespoons (no more salt will dissolve unless you heat the water).
234198
salt helps maintain water in the body
298760
Because the salt content will dehydrate you. And severe dehydration could kill you especially if you are out at sea and medical treatment is not nearby.
306007
Fire away, as said before, there are no dumb questions.\n\nFish don't float because they are heavier than water, without the air pockets. They take in water in to go down and discharge water to go up, like a submarine.\n\nIf just sitting there and not going up or down is called neutral buoyancy. Fish then weighs the same as the water.
738402
Attach a bare wire to each terminal and dip the ends of both in salty water. Bubbles will form near the wires as the electricity breaks the water and salt molecules into their constituent gaseous elements. \n\nBy the way, with salty water you will get hydrogen and chlorine, but not oxygen. The salt is needed to make the water conduct electricity, but it also prevents you from getting oxygen gas from the water. You can do this experiment without the salt, but you will need WAY more than 9 volts. In that case you would get oxygen.
106254
higher When a body floats in a liquid it has to displace an amount of liquid equal to its own weight. Therefore, a body floats "higher" in a denser liquid because the volume of the denser liquid displaced - which is equal to the volume of the submerged portion of the body - will be less than the volume of the less dense liquid displaced Salt water is denser than water
74937
there is salt in the water
481877
Your other answerers are on the right track.  When a boat floats, it displaces a volume of water with a weight equal to the weight of the boat.\n\nSo, the heavier the liquid in which the boat is floating, the less liquid it must displace in order to float, and thus, the higher it will float.\n\nThis means that the basic question is which is more dense (and so, heavier), saltwater or freshwater.  And, the answer is that saltwater is somewhere between 2.5% and 3.5% more dense than freshwater.
1117915
because the salt u use in the kitchen does not contain all the particals in the sea water like sodium sulphate magnesium sulphate etc because they are removed in the process  of making the salt and some times the salt it cut down from deep earth and they are also cleaned by removing the toxic particles and iodised which may alter the sea water salt from earth solt altho the main component of salt is Na Cl it has other particals such as iodine and k+ irons Fe ect...
421194
In general, sperm cells have to swim to find the eggs. So producing more of them increases the male's chance of fathering offspring. If Yellow Perch lay eggs in the water rather than have internal fertilization, then males might compete to have their sperm get to the eggs. This of course favors making as many sperm cells as possible.
681194
Salts love water because they are ionic, and can have polar interations with the polar water molecules. The salt will soak up water from the air, and eventualy will become hydrated salt.