Why is it easier to float in salt water than in fresh water? please help?
80201
Yes. The salt water is denser and thus easier to float on. I have tried this in the Great Salt Lake and experienced it first hand.
1122428
Because the body cannot process salt water.
908737
compared to what?\nIt would be buoyant compared to sea water, which is heavier due to the high number of minerals dissolved in the water.\nIt would not be buoyant compared to distilled water, which would be lighter because it has no minerals dissolved in it.
886938
Ocean water has more dissolved solids in it, mostly salt. Great Salt Lake in Utah is even saltier than the ocean and a person can float on it like s/he was on a raft. Don't make the mistake of rubbing your eyes though, because it stings like hell!
868202
I float in a fresh water pool, don't you?  My head is not above water, but if my lungs are full of air I do not sink.  If I empty my lungs then I will sink.  What is your question?
685001
in a calm sea, it should be easier to swim since the water density is higher allowing you to float easily.\nbut then depending on factors like waves and river speeds, your experience could vary!
297006
A boat intended for salt water can be used in fresh water, but its load capacity is reduced because fresh water is less dense than salt water (so, for a given load, the boat floats lower).  Generally, craft intended for fresh water should not be used in salt water because metal parts that are not intended for exposure to salt spray will corrode.
291004
if an object is floating, the buoyant force on it equals its weight -- the vertical forces have to sum to zero.  try drawing a free body diagram to convince yourself of this.
42743
It is called the dead sea because there is not alot of life in it...however the good news is its hard to get things to sink there.  The reason for both of these thigns is the salt content of the water, things cant live if teh water is to salty.  The reason things float is because water is more dense when there are other minerals and compounds in it, thats why its easier to float in the ocean, just think of the dead sea as an ocean with lots more salt\n\nhope this helps!!
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
879947
Hello,\nDensity is mass per unit volume.  The density of fresh water is one gram of mass per cubic centimeter.  Since, the ocean water has salt in it, there is more mass per cubic centimeter of salt water.  If you think about a glass full of fresh water and a glass full of salt water, you can easily see that the glass full of salt water has a lot more material(mass) per cubic centimeter than the fresh water does.  So the glass full of salt water (or the ocean)is more dense than the glass full of fresh water.\nAnd that affects a boat by making it float higher.  When an object is placed in water, it displaces as much mass of water as is contained in the object.  Again you can think of a glass of water.  If the glass is filled to the top and you place an object of mass M-grams in the glass, then the amount of water that spills out is M-grams.  The object displaces the mass of the water by sinking into the glass.  Once it has displaced M-grams of mass, it can't displace any more, therefore it will stop sinking as soon as it displaces M-grams.  So since each cubic centimeter of salt water is made up of more mass than fresh water, the object will displace less cubic centimeters of salt water than of fresh water, so it will float higher.
427084
The density of water is greatly affected by salinity, or the salt concentration.  When salts are dissolved into pure water, the density of water increases because the salts have a greater density than the water; thus freshwater floats on salt water.  This is also why your ability to float differs between a swimming pool and an ocean.
844403
The reason why sea water is salty is of course because of the presence of salt. However, how does it get into the ocean?? \n\nAs water evaporates, it rises and cools and becomes clouds. It then falls off as rain. These are fresh water as the process is like distillation. As you may know, water is a pretty good solvent and as it washes down the ground, it dissolves small amount of minerals, which includes salt, NaCl.\n\nAs you know, water does not just stay on the ground, it flows from high place to low, carry all these minerals with it. As it moves to the lowest point on earth, there is no where to go, so it accumulates. As time goes on, it forms ocean. As this process continues, all the salts are washes into the ocean with no exit, as a result, make the ocean more and more salty.\n\nThe dead sea, is indeed the lowest level on earth, and is indeed the most salty sea. The water density is so high (because it has so much salt in it) that almost anything can float on it.
836580
Salt water has a lower freezing point than fresh water.
108432
Boats do NOT displace more water than they weigh - the amount of water displaced is EQUAL to the weight of the boat. Salt water is heavier per cubic meter than pure water or fresh water, so a smaller amount of salt water would be displaced for the same weight boat. If the density of the solution was extremely high, as in mercury, the boat would appear to sit on top of the liquid.
968670
Water in the sea can vary in salt concentration, temperature and in ion ratios. The first two create differences in the density of the water and therefore warm / less salty (light) water floats on cold/ salty (heavy) water.\n\nSince these currents do not mix easily, different ratio's of ions in seawater can maintain their difference. These differences are created by sources of ions (vulcanic activity which can create specific ions, incoming rivers) or by the fact that certain ion concentrations (HCO3-, HSOx-) are very temperature dependent. \n\nusefull info can be found on http://www.biosbcc.net/ocean/marinesci/02ocean/swcomposition.htm
372889
Every body that is in a fluid, or it is floating on the surface, or is sunk to the bottom loses an equal ammount of weight as the weight of the displaced fluid by the volume of the body.\n\nThe force that makes body's float or makes them lighter in a fluid (for ex. water) is called Archimed's force or Archimed's principle.\nIf this force is grater then the weight of the body (G=m*g) then the body floats on the surface.\n\nArchimed's force is greater if the density of the fluid is bigger. Oil has the density of 900 g/cm3 and water has the density of 1000 g/cm3. Because the reason why the objects are floating in oil and in water is of same nature, floating on oil is similar to floating on water.\nBut water has a bigger push force then oil.