Why is it easier to float in seawater than in fresh water?

Answer 1

salt is dense, the dead sea is so full of salt if you pass out face up you wont drown because half your head is above the water as well as your body! if you watch the movie altered states you see the guy floating in a pool of Epsom salts in a dark chamber its like floating on a cloud in the dark so you can do all your thinking without feeling your surroundings!

Answer 2

Because seawater has a higher salt concentration and is therefore more dense, so our bodies float easier since the difference between our body density and the water's density has changes.

Answer 3

Buoyancy is a direct result of the weight of liquid the object is displacing. If you are the object, then your immersed body is pushing water away from the volume it occupies. This volume raises (ever so slightly) the water level which tries to push back down, resulting in an upward force on the immersed body.

The human body has a density very close to that of fresh water. So almost your entire body has to be immersed before the weigth of the displaced water matches the weight of your body (only your eyes and nose poke above the surface).

Sea water has a higher density (we use 1.026 in ship stability calculations). So 2.6% more of your body will be sticking out (eyes, nose and mouth) if you immerse it in sea water.

PS: Density of ice is approx. 0.9. Density of sea water is approx. 1.026. Both vary with the exact composition and temperature.

Therefore, an iceberg has to displace approx. 88% of its volume in sea water so that the weigth of the displace water equals the weight of the iceberg. So the visible part of the iceberg is only 1/8 to 1/9 of the whole iceberg.

If the iceberg should make its way into fresh water, it would have to sink a bit more in order to displace the same weight of water. Only 1/10 to 1/12 would be visible.

In theory, if the iceberg makes it fast enough into warm water (warm water has less density), it could sink before melting. The idea has been used in some science-fiction movies.

Answer 4

Density of saltwater is greater than freshwater, simply by disolved salt. Floating/sinking is a function of buoancy, it fairly is straight away bearing directly to density. If an merchandise has a decrease density than what that is in, that is going to waft. ecosystem changes simply by gravitational effects as you go faraway from the earth. The gravity field around the earth decreases as you progression faraway from the exterior, for that reason having the ability to preserve much less ecosystem. The density for that reason is far less as you go up in top. you in addition to might have the effect of the ambience "pushing down" on the atomosphere under it, you're effectively stacking up some miles of air on acceptable of the air at sea point. This weight compresses the air on the backside, close to sea point. Its the comparable effect as being underwater, rigidity will develop. the version is that water isn't very compressable (being a liquid, not a gas) and so it can't develop its density, it purely transmits the rigidity straight away

Answer 5

the force that makes you float is equivalent to the weight of the volume of liquid that your immerged volume displaces.

seawater has dissolved salt, so is heavier per unit volume.

so when you need to displace a smaller volume of seawater, to generate a force equivalent to your weight, i.e. make you float.

in other words, you'll float higher.


hope this helps

Answer 6

Sea water has salt dissolved in it, which makes it heavier than fresh water. Since the water is heavier, you are lighter compared with it, so you float better.

Answer 7

Hello... It is easier to float in salt water than in fresh water, because salt water is very dense. Salt water also provides more buoyancy than fresh water. Fresh water has more oxygen than salt water. But salt water has lots of salt deposit. Salt water also has more volume than fresh water.

Answer 8

Because of the concentration of salt. Try sinking on the Great Salt Lake in Utah. Its almost impossible.

Answer 9

Cause seawater contains sewage and more air bubbles. Due to the fact that more people fart in the ocean.

Answer 10

seawater is more dense, so you have more boyancy.