How does the convection current works in water during winter?
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During winter the water at the surface of lake or pond gets cooled.\n\nDue to cooling density of water increases; denser water\ngoes down, while the relatively hot water comes up. This is convection.\n\nBut water has a peculiar property that below 4 degree C it becomes less dense.\n\nTherefore when the surface temperature is 4degree and below, the water at the surface cannot go down. Hence convection of water is stopped. \n\nThe temperature increases relative to water surface.  If the temperature of the water surface reaches freezing temperature, ice is formed on the surface and the freezing takes place from top to bottom.\n\nThus lives of water living creatures are saved from freezing.
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Also pressure from cold water sinking in some areas, thus causing it to rise in others, such as the Peruvian coastline (produces La Niña), the ac5tion of prevailing winds on both warm and oold surface waters.  Also water entering the oceans from large rivers such as the Amazon and Mississippi, and also salt concentration (dense water sinking).\n\nTidal currents are caused by the combined effects of the sun and the moon, the strongest when their effects combine.\n\nHeat and cold also affect water density, causing the ocean suface to be higher in hot areas and depressed in cold areas.\n\nGenerally these effects keep water circulating.  Some lack of movement is possible where all are missing from a given area, such as the Sargasso Sea.
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Normally at 0ºC or 32ºF.  At that point water just begins to crystalize.\n\nThere are cases when water will not freeze, like \n- freezing point depression due to hydration,\n- freezing point depression due to osmotic effects (these are both equilibrium effects),\n- supercooling: the delay or absence of formation of an ice crystal in the absence of efficient ice nucleators and/or\n- the high viscosity\n\nFor every 0.5ºC (1ºF), water's viscosity will change by about 1.5%.\n\nWater viscosity is inversely related to temperature. The lower temperature, the higher viscosity.\n\nBut, water's dynamic viscosity at 0ºC is 3.732µ [ 10-5 (lb.s/ft2)] and the kinematic viscosity is 1.924v [10-5 (ft2/s)].
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Convection is heat transfer by motion of a heat carrying medium.  It is a process where air or liquid moves the heat from one surface to another.
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Yes, it does.  This is evident by water freezing in enclosed containers (such as pipes) and deforming them, sometimes even rupturing them.  \n\nWhen water molecules become cold enough to freeze, or change into a solid form, their crystal structure is less dense than when in liquid form.  This is due to the inherent shape of the water molecule and how the molecules line up in solid form.\n\nIf you live in a colder climate, it's a standard procedure to drain any remaining water out of things kept outside over the winter, such as boats, swimming pools, outdoor water pipes, etc.  Otherwise you can almost expect them to be ruined by the time you want to use them again.
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Silver iodide is released into the clouds which baically grabs hold of supercooled water droplets (water that is colder than ice but still liquid) and if the conditions are right, the supercooled water droplets will freeze, attract more water droplets and eventually form snowflakes....\n\nPlease understand that this is a very basic description but gives the idea...
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whoissarthak's idea works, but that isn't a wet suit; that's a dry suit.  A wet suit works differently.  The idea is that there are basically three ways to move heat: conduction, radiation, and convection.  Conduction is when two things are in direct contact, like touching a hot stove or a cold flagpole.  Radiation has to do with the infrared light emited by warm bodies, and has nothing much to do with your project.  Convection is the real concern--it is the transfer of heat by means of a fluid intermediate, and it is the fast form of heat loss.\n\nYou're body sheds heat by means of perspiration, where sweat evaporates and takes heat away with it--that's convection.  When you fell colder in a strong breexe, that's convection taking heat away quicker.  When you blow on a spoon of hot soup to cool it, that's convection.\n\nThe way a wetsuit works is by not allowing the water in contact with the skin to be carried away.  It inhibits the movement of water through it.  Enough gets in to contact the skin and make your skin wet, which is why they call it a wetsuit, but that water doesn't leave easily.  It stays put and your body heats up the water.  Hence, the water in your wetsuit is much warmer than the water in the surrounding ocean, so the water taking heat from your skin is not quickly carried away and replaced by more cold water.\n\nIf you want to make a wetsuit, you want something htat will make it difficult (but not impossible) for water to come and go.
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As water flows in rivers, it picks up small amounts of mineral salts from the rocks and soil of the river beds. This very-slightly salty water flows into the oceans and seas. The water in the oceans only leaves by evaporating (and the freezing of polar ice), but the salt remains dissolved in the ocean - it does not evaporate. So the remaining water gets saltier and saltier as time passes.
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it heats up if  you go down for a long way,\nwith water it sinks to 4 degrees then if it gets colder it rises ,dont ask me why ,it is just that way.\nWater does not always follow the rule \n\nground temperature is the coldest at the surface ,in cold weather,\nthan below it is constant for a long way \nafter a few miles it will heat up.
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The answer to this is made tougher by the fact that the water will be freezing.  I mean how can you answer a question where the water is ice cold and use the data provided at STP?  Think you need to either re-read your question or provide a little more info.
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One thing I know, salt reduces the freezing temperature of water, its why ppl use salt on snow and ice. Not because it melts it, but because it reduces the freezing temp.
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Actually, it wouldn't.  There will always be a vapor as long as there is a sunlight OR temperature above 32F/0C.  Even of the rain that falls, much of it goes back into the air (notice a heavy humid feeling during and immediately after a rain?).  When it sleets or snows, as soon as the sun comes out the light works by being focused by the crystal structure of the ice and literally vaporizes the ice, going straight to vapor, skipping (for the most part) the water phase.  Water likes a balance.  When water is scarse in the air, water molecules on the surface fairly leap into the air, unless the air is crowded with them already.  Fascinating cycle.
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Cold water has more dissolved gases in it than hot water.  Any dissolved solutes cause the freezing point of water to be lower than pure water with nothing dissolved in it.\n\nThis means if your power goes out in the wintertime and it is about 32 degrees F outside, the water in your hot water pipes is more likely to freeze than the water in your cold water pipes.  This is because the freezing point of the water in your hot water pipes is higher than the freezing point of the water in your cold water pipes.\n\nSpeed isn't being considered here.  The cooling process is assumed to be slow so that the pipes are in thermal equilibrium with surroundings.\n\nAlso check out this link.  It is from the Alaska Science Forum.  They can explain the water pipes problem more correctly than me and they have more personal experience with the phenomenon.\nhttp://www.gi.alaska.edu/ScienceForum/ASF4/440.html
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When you run amps of current through conductive water, such as salt sea water, the water will interact with a magnet.  The caterpillar drive which pumps water through a tube with a an electric field through the water and a moving magentic field to create a jet of water is actually possible.  The water, however, is only acted on by a magnet as long as the electric current is flowing.  When the electric current stops, the water is disorganized and is unaffected by a magnetic field.  (Water molecules, however, are slightly polar, being slightly positive on the 2 hydrogen on the end, and slightly negative on the oxygen end. Note that this is a STATIC electric field, not a magnetic field!!!!)\n\nForce=ExB.  The electric field crossed with a magnetic field creates force.  Similarly an copper wire is not a magenet either.  Yet when an electric current is flowing through it, and it intersects a changing magnetic field, it will create a force on the wire.  Also, a changing electric field in a wire will induce a changing magnetic field in a magnetic material, like iron.  \n\nBoy I hope I haven't muddied the waters;  let me summarize: water CAN support an electric field through it, and hence be acted on by a magnetic field.  Changing the electric field in water can induce a changing magnetic field in a magnetic material.  Water, in itself, IS NOT, and CANNOT be magnetic, ever.  If you put iron particles in it, the iron particles will be magnetic.  Other metallic salts, sodium, calcium and the like will NOT make the water magnetic, only conductive.
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Lake effect snow happens because during the summer, the lake water warms up; then, during the winter, it takes this warm water longer to cool down and freeze.  As a result, there is a period of time where the weather is cold enough for snow, but the lake isn't yet frozen.  As the winds blow over the lake towards the city, it picks up water from the lake and drops it as snow on the city.\n\nBecause the lake usually does freeze, the water is relatively colder in the spring and summer, and cold water evaporates less rapidly than warm water.  So, the air picks up relatively less water from this cold water than it would if the water were warm, so the city is somewhat protected from lake effect "rain".
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like what do you mean,like why can you swim in cold weather? because the water is a higher temperature then outside...im learning this right now in science,but i dont listen alot...lol..sorry
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Convection. EXAMPLES: If you think about a pot of water that is heated on a stove, the stove burner heats the bottom of the pot by conduction. Water touching the bottom of the pot is also heated by conduction. As this water is heated, it expands and becomes less dense than the cooler, denser water that is above it. The cooler, denser water at the top of the pot sinks and pushes the hot, less dense water upward. As the hot, less dense water rises, its particles come in contact with colder water particles, so it gives up heat energy to the lower temperature water particles with which it collides. That is, it cools by conduction. As it cools it "contracts" and becomes denser, causing it to drop toward the bottom of the pot again, forcing the warmer water below it to rise. This movement causes convection currents. These currents transfer thermal energy from warmer to cooler parts of the liquid.