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ahhh, sink in relation to what... they sink in relation to other air and other water... normal temperature air and normal temperature water they sink because cold things are thicker (more massive) than warm things. They are thicker because the atoms have less random motion when they are cooler. Thicker things are heavier than warm things because they have more atoms in the same amount of space. Heavier things fall below lighter things, so cooler (heavier) things sink below normal or warmer (lighter) things.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoCold Water sinks below cold water for a number of reasons. One reason is because when water heats up and nears evaporation the molecules move faster and faster and the density decreases. Another reason is because the more this process continues the faster the convectioon current. A convection current is when the water heats at the bottom, and cools at the top. When this happens the water forms a circular current and the water is pushed along which speeds the process of warm water rising. Hope this helps.
The Science Guy
Wiki User
∙ 14y agoThis first part has all got to do with thermodynamics.
Cold water takes up less space than hot water.
One litre of Cold water is in other words "more" than one litre of hot water.
It is not easy to measure, but it works that way.
Since Cold water is "heavier" or "more compact" it will sink down in hotter water.
Salt on the other hand is quite heavy. One litre of salt is heavier than one litre of water, ergo it will sink to the bottom.
It slowly dissolves into the water and creates "salt water". This salt water is quite a bit heavier than fresh water pr litre, hence it sinks down.
The effect of Saltwater versus Fresh water can easily be tested.
If you jump into the swimming pool, you barely float if your breathing is steady.
If you jump into the ocean, you can very well float without so much breathing technique.
Having a bath in the Dead Sea (with a very high concentration of salt) you feel like floating on top of the water, difficult to dive down because you float like a cork.
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<P>Density.
<P>In cold water, the particles move more slowly than in hot water. So the particles in the hot water collide more strongly and push each other apart more (they expand). This means the same amount of water weighs less (so the hot water floats). The particles in the cold water move slower and so are closer together. They are therefore more dense and tend to sink in the less dense hot water. Salt water has salt dissolved in it so it to is denser than freshwater and sinks.</P>
Wiki User
∙ 12y agoIt's because the atoms in warm water are being excited by the heat making them move more resulting in the lower density
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Does hot water rise and cold water sink?
HOT rises COLD sinks
Why doe the water not come out of the sink facets but works everywhere else?
if you look under the sink, you will probably see a cutoff valve going up to the sink faucet. turn this on. if that does not fix it, then change you faucet fixture.
How faster will soap dissolve in cold or hot water?
Well it really depends on what type of soap you're using
Why does warm water rise and cold water sink?
Actually you are wrong, its vise versa, hot water rises and cold water sinks. This is because when water molecules gain energy, they become hot. Molecules try to move away from one another. And this leads to reduction in density. Since density of water reduces as it becomes hot, how water moves up and cold water sinks down.
What is the tool in science that if you put in water it doesn't sink and in olive oil it does?
When you put a science tool in water it doesn't sink and in olive oil it does sink
How are deep ocean currents form?
Cold ocean currents sink under warm ocean currents to form deep ocean currents.
What force makes cold water sink toward the ocean floor?
gravity
If a mass of ocean water is cold and salty what will it where on earth's surface is this event common?
the salt will sink to the ocean floor and it happens at the poles.
Why does cold water sink under hot water?
cold water is denser than hot water. The same is true of most other substances as well.
Why 2 shutoff valves under your sink?
One for the hot water, one for the cold.
Will cold water sink or swim?
SiNk
Why does cold water sink under warm water?
Because cold water has a higher density than warm water. Water contracts when its temperature lowers, causing its density to increase.
Why would the cold water in your kitchen sink come out VERY hot first and the floor around the kitchen sink is also very hot?
Are you talking about pipes under a slab here? If so you probably have a hot water line under the slab leaking that is heating the water in the cold line.
Which ocean did the titanic sink and how deep was the water?
Titanic was crossing the Atlantic Ocean on her maiden voyage and is now 12, 600 feet under the surface.
Why does cold water and air tend to sink?
cold air and water tend denser than hot air and water, so they sink
Does potassium sink under water?
yes it will sink under water because it is denser than water.
What is the deepest and densest layer of water in the ocean?
A basic answer is that the densest ocean water is the saltiest - a ship floats higher in salt water (sea) than in fresh water (lake). Also cold water tends to sink towards the ocean floor, or may form a layer mid way.
