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# Is cold water more dense than warm water

### Is warm water more dense than cold water? - Answer

• No, warm water is less dense than cold water. As the temperature of a substance decreases, its density increases (because the atoms and molecules become more tightly packed)
• Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water
• If it were significantly more dense, water levels would drop significantly as the water got colder, and rise significantly as the water got warmer. system October 15, 2019, 10:25pm #1
• Water below 4 degrees is lighter than water at 4 degrees. So that means within that range that cold water is lighter than hotter. However when you compare water above 4 degrees, it gets less dense as it gets hotter
• Since water at about 39°F (4°C) is more dense than water at 32°F (0°C), in lakes and other water bodies the denser water sinks below less-dense water. If water was most dense at the freezing point, then in winter the very cold water at the surface of lakes would sink, the lake could freeze from the bottom up

Warm water is more dense than cold water. Warm water is less dense than cold water. The density is the same for warm and cold water. The density will sometimes be higher for warm water and other times higher for cold water So hot water takes up more space than cold water. The amount of space something takes up is called volume. If you were to have 2 cups of water, one of hot water and one of cold water with equal volumes, the cold water would have more molecules. Hot and cold water are made of the same type of molecules You are correct to state that an object is more buoyant in cold than warm water, but not your reasoning. The Plimsole lines on ships recognise the effect of temperature (and salt concentration in sea water) on the water density. 1.8K view When there is more space than cold water of the same volume, the weight becomes less because of the presence of a fewer number of molecules. This does not happen when water is cold. So, hot water is less dense than the same volume of cold water. Now, you may be wondering that if this is the case, why ice is less dense than water Which one is heavier ? 200 grams of cold water or 200 grams of hot water ? Actually both have the same mass. They weigh the same.200 grams of hot water takes..

### Temperature and Density Chapter 3: Density Middle

Cold water has a higher density than warm water. Water gets colder with depth because cold, salty ocean water sinks to the bottom of the ocean basins below the less dense warmer water near the surface Which type of water is more dense: cold, salty water or warm, less salty water? Explain your answer 2 See answers loganchristensen loganchristensen Salt as well as a lower temperature raises the density, so it would be cold, salty water. hagerkamel13 hagerkamel1 Cold water is always more dense than warm water, the density change amounts to about 4tenths of about one percent between near freezing and 30 degrees celsius (86 degrees fahrenheit). Although small, this difference allows water to float on the top of the cold water When you heat up water, the water molecules start moving around faster and faster. They bounce off each other and move farther apart. Because there's more sp.. Warm water is more dense than cold water. Warm water is less dense than cold water. The density is the same for warm and cold water. The density will sometimes be higher for warm water and other times higher for cold water. Warm water is less dense than cold water

Hot water is lighter than the same volume of cold water, not heavier. The reason for the decrease in density as the temperature increases is that the water molecules cannot get so close together at higher temperatures. The molecules have more kinetic energy and take up more space as they move around in the liquid A material does this when it is more dense than water. 0 degrees celcius. the temperature water freezes at. Ice. floats in water because it is less dense than water. solid. Has a definite volume and shape. Start studying Hot Water/ Cold Water. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. Create. Cold water is more dense than warm water Cold water is heavier or more dense than warm water. That means that cold water will sink below warm water. Watch this video demonstration that shows cold water sinking below warm water Cold Water is Heavier... If you rephrase this experiment by STARTING OUT with two containers of equal volume water, one which is HOT, and the other which is COLD, then clearly the COLD one will be heavier because hot water is less dense and thus has smaller mass per volume. That mass loss far outweigh the relativistic effects of Em=mc^2

The water is always warmest at the surface. This is a corollary of number ten in the previous list (water covered by ice is coldest). Water has a maximum density at 4 degrees Celsius. Therefore water at this temperature sinks to the bottom, and in the surface layer, the water temperature can be less or greater Surface sea water gets warm, starts to evaporate (hence clouds) and therefore gets denser. So it sinks to the ocean floor, where it cools down to about 4 deg Celsius, and gets denser still. But it still is a very long way from being saturated with salt, so 'how much salt the water can hold' doesn't come into it The molecules in hot water move faster than those in cold water. Hot water molecules bounce around and leave gaps. This makes hot water slightly less dense than cold water. So when you put the cold water on the bottom, the denser cold water stays there. But when you put the cold water on the top, heat molecules rise. So the colors mix right away Water is unusual in that its maximum density occurs as a liquid, rather than as a solid. This means ice floats on water. Density is the mass per unit volume of a material. For all substances, density changes with temperature.The mass of material does not change, but the volume or space that it occupies either increases or decreases with temperature

• This makes cold water more dense than room temperature water. Since cold water is more dense, it sinks in the room temperature water. When water is heated, the water molecules move faster and spread out more. This makes hot water less dense than room temperature water. Since hot water is less dense, it floats on the room temperature water
• Cold water is denser than hot water for the same reason that cold gases are denser than hot gases or cold solids are denser than hot solids. In hot water, the molecules are bouncing off each other more vigorously, and need more space than in cold water -- the result is that you have fewer molecules per unit volume in something hot than in something cold
• Hot air balloons rise because warm air in a balloon is lighter and less dense than cold air. Similarly, warm water is lighter or less dense than cold water. When the bottle of warm water is placed on top of the cold water, the more dense cold water stays in the bottom bottle and the less dense warm water is confined to the top bottle
• Raising the temperature of a cubic centimetre of water by 1°C takes more than 3200 times as much energy than you'd need to heat the same volume of air by the same amount. This means that the layer of water surrounding your body heats up only very slowly, the temperature gradient between the water and you stays very steep, so the rate of heat.

### Is Cold water heavier than hot water? - Chemistry Stack

1. More Water zu Bestpreisen. Kostenlose Lieferung möglic
2. Water is more dense the colder it becomes. That means cold water is more dense than hot water. Water reaches its maximum density at a temperature of just under 4 °C. After that, its density.
3. and fill with warm water until half full. Place ice in the 100 ml container and fill half full with water. Stir the ice and water to cool the water. Add a dark food coloring (red or blue) to the cool water and mix it well. Keep adding food coloring until the water is very dark. Use the thermometer to check the temperature of th
4. g less dense. If equal volumes of cold water (down to 4deg.C, 39.2deg.F) and hot water are.
5. Which type of water is more dense: cold, salty water or warm, less salty water? Explain your answer 2 See answers loganchristensen loganchristensen Salt as well as a lower temperature raises the density, so it would be cold, salty water. hagerkamel13 hagerkamel1
6. Someone could argue that, at identical volumes, cold water (above 4C) contains more molecules (i.e. is denser) than warm water but this difference is likely very slim. In this paper they also define thirst. Thirst is a homeostatic mechanism that regulates blood osmolarity by initiating water intake when blood osmolarity increase

### Water Density - USG

Cold water is more dense/buoyant than warm water. Plimsoll lines were based on water buoyancy in English salt water at Summertime. The 'S' line on the hull markings stands for Summer waters in temperate. The 'T' refers to salt water in Tropical climates and the 'W' means salt water in Winter in temperate climates and finally, 'WNA. Water is complicated, with many unusual properties, says Raz, pointing out that ice, for example, is less dense than water - not more dense, as one might expect. Still, Gbur thinks this new theoretical framework is possibly a game changer in terms of the Mpemba effect and it has already inspired studies of it in granular materials A map of average sea surface temperatures over the entire Earth is provided. Warm water is less dense than cold water. Based on this information and the map provided, it could be predicted that, as a general trend, ocean water will. Warm water lobsters and cold water lobsters include a few likenesses inside their group, yet the two kinds are altogether different from one another. Warm-Water Lobster. Warm-water lobsters come from - you got it - waters with warm atmospheres, similar to the shore of Florida, California, the Caribbean, and the South Pacific district Cold air: is less dense than warm air holds more water vapor than warm air sinks rises holds less water vapor than warm air is more dense than warm air 2 See answers ltenz ltenz Cold air IS less dense, sinks, holds less vapor imwolfe26 imwolfe26 Answer: cold air is less dense, sinks, holds less vapor

### Warm water is less dense than cold water

1. A few are even true. 11. Fresh water feels colder than sea water at the same temperature. Ice at the edges of Lough Dan,scene of Fergal Somerville's Ice Mile Invitationals. This myth is usually confirmed by most experienced cold water swimmers. Most say it's because sea water is more dense, which it is, without explaining why that.
2. In the North Atlantic, water heated near the equator travels north at the surface of the ocean into cold, high latitudes where it becomes cooler. As it cools, it becomes more dense and, because cold water is more dense than warm water, it sinks to the deep ocean where it travels south again
3. The second addition shows that the warm water is buoyant (less dense) than the cold water and therefore rises. Movie 2 - Here's what happens when colder water enters a summer-stratified lake. Movie 3 - Same as movie 2 without the dyed green epilimnion
4. Question 1 2 out of 2 points Cold water is _____ than warm water and salty water is _____ than fresh water. Selected Answer: more dense; more dense Answers: less dense; more dnese more dense; more dense less dense; less dense more dense; less dense Question 2 2 out of 2 points Ocean water at high latitudes has _____ surface temperatures and.
5. The heated water will expand compared to the colder water, so it will displace more of the air than the cold water, and the hot water will thus experience a buoyant force. I calculate this effect would make the hot water weigh 33 milligrams lighter than the cold water (see (100 celsius) * (coefficient of thermal expansion of water)*(1 liter.

Globally, the entire temperature range for ocean water ranges from ~ -2°C to +40°C, which is much smaller than the temperature range for air, which varies from -60°C to +60°C. Surface water temperatures vary much more than deep water temperatures. Most of the ocean is warm at the surface and colder at increasing depths The second time, the warm, red water stayed floating atop the blue, cold water. This is because the warm water was less dense than the cold. The colors didn't mix! The same rules apply to air. But, in winter some lake surfaces can get very cold. When this happens, the surface water becomes more dense than the deeper water with a more constant year-round temperature (which is now warmer than the surface), and the lake turns, when the colder surface water sinks to the lake bottom

### Q & A: Hot and Cold Water Department of Physics

The molecules in water at 60°C (which feels hot) are more spread out than the molecules in water at 10°C (which feels cold) making the warm water less dense. What about our experiment? In the pair of bottles with hot water at the bottom, the cold water sinks and the hot water rises so that it floats on top. In the process the two mix Cold water does weigh more than hot water because it is more dense at a colder temperature. The strange thing about this behavior is that once the water freezes and forms ice, the ice is less dense than the water. Ice floats because the weight of the water that the ice displaces is greater than the weight of the ice itself It also brings warm water to parts of northern Europe. Because of this warm water, these northern countries have warmer weather, these northern countries have warmer weather than you would expect. The water at the earth's poles is cold and dense. This cold water sinks and moves along the ocean floor in a current

Because there's more space between the molecules, a volume of hot water has fewer molecules in it and weighs a little bit less than the same volume of cold water. So hot water is less dense than cold water. When you put the two together with the hot water on the bottom, the hot water rises to the top, mixing with the cold water along the way. Here, the water is chilled by arctic temperatures. It also gets saltier because when sea ice forms, the salt does not freeze and is left behind in the surrounding water. The cold water is now more dense, due to the added salts, and sinks toward the ocean bottom. Surface water moves in to replace the sinking water, thus creating a current

Ice floats in liquid water, so ice must be less dense than liquid water. Ice is actually kind of a strange case. Usually, substances expand and become less dense when they are warmer, and shrink and become more dense when they are colder. Liquid water at room temperature, for example, is slightly more dense than hot water Cold water holds more oxygen than warm water because water molecules are closer together in cold water, which makes it harder for oxygen molecules to escape. The tighter structure is also conducive to a more consistent attraction between the oxygen and water molecules. The solubility of oxygen in water depends on many factors B Hot water is more dense than cold water. C Metal gauze does not allow heat to pass through. D Water is a poor conductor of heat. 25 Which statement about the transfer of thermal energy is correct? A All metals conduct thermal energy equally well. B Convection can only occur in solids or liquids Good question John. I would say it is due to the density of water being much greater than the density of air. Whereas with warm or cold air, although the warm air may be less dense, its molecules are moving more so it can transmit vibrations more rapidly through it. Repl Hot air is less dense than cold air. When the air gets hot, its density decreases, and now there's more air molecules in the colder zone than in the hot zone. There are more complicated things happening, but for this simple reason alone, we might expect hot air to rise for the same reason that objects less dense than water will float in water

Hot water may scientifically seem more efficient in putting out a fire, but you're probably wondering how much more efficient is hot water than cold or regular water. Honestly, the difference might be too small to even consider, particularly in the practical moment of needing to put out a fire 85F(29.4C) Water feels pleasantly cool rather than warm. 77-82F(25-28C) Swimming pool temperature range for Olympic competition. 70F(21C) Water feels quite cold to most people. Treat any water temperature below 70F (21C) with caution. 40F(4.4C) or lower Water is painfully cold. Different Stroke more dense than a fluid will sink in that fluid, so cold water sinks in warmer water. Hot air rises and cold air descends for exactly the same reason. Hot water rising and cold water descending in. if you look at most substances so this is most things right over here as we go from a liquid state where things are literally fluid the molecules are moving past each other to a solid state where things are rigid or more rigid you typically have something getting more dense so the liquid state would be less dense less dense and the solid state would be more dense would be more dense let's.

Cold and salty deep ocean water A. rises and mixes with fresh water. B. is lighter than warm surface water. C. sinks further as salinity levels decrease. D. is more dense than warm surface water While a given pound of water and a pound of ice would have the same mass, the volume would be different. The water would have less volume, because water is more dense than ice (which is why ice forms at the top of a lake). The situation with gases is a little different. When you heat a gas, you don't change its mass. (Wow, that rhymes Reports indicate that nearly 70% of people believe cleaning with hot water is more effective than using cold water, as it gets rid of all the bacteria*. Plus, it's traditionally known that hot water cleans better as it melts grease, oil and fats

That means, for the same volume of air, hot air has fewer molecules and so it weighs less. So since cold air weighs more, it sinks, driving the hot air up, Answer 3: Basically yes. Our atmosphere, like a body of water, is a fluid that has a density that is determined by a balance between gravity and pressure (plus temperature) And water vapor molecules are lighter than both nitrogen and oxygen. In other words, humid air is going to have less heavy nitrogen and oxygen -- and lighter hydrogen and oxygen -- in its place. Remember that they have the same number of molecules, but the air with water vapor is simply less dense [source: Schrage ] The question i m asking is why hot water is more effective than cold water in cleaning (cloths,curtains,bedsheets etc). I shall be thankful to have your answers. everyday-chemistry cleaning. Share. Improve this question. Follow edited Oct 26 '16 at 19:54. Jan Also warm/hot water relaxes the body better. Cold water might be more refreshing, but it may disrupt your vocal cords, that's why singers always drink room temperature water. The best indicator on whether your body is getting enough water is urine color. If your urine is dark yellow, chances are you're not getting enough water Saltier water is more dense than less salty water; cold water is more dense than warm water. Denser water tends to sink, while less dense water tends to rise. Cold-water currents occur as the cold water at the poles sinks and slowly moves toward the equator. Warm-water currents travel out from the equator along the surface, flowing toward the.

The Mpemba effect is the observation that warm water freezes more quickly than cold water. The effect has been measured on many occasions with many explanations put forward Hot water has more kinetic energy than cold water, meaning the molecules in the water move around more quickly. When these molecules interact with the surfactants in classic detergents, the greater energy they possess means they are able to more quickly agitate the surfactants (water-fearing molecules that grip dirt and, like kids darting away. Sea otters are the smallest marine mammal. As cold-water dwellers, staying warm is a top priority, but their dense fur only goes so far. We have long known that high metabolism generates the heat.

### Why does an object float better in cold water than warm

Water's density is determined by the water's temperature and salinity (amount of salt). Cold water is denser than warm water. Water with high salinity is denser than water with low salinity. Ocean water always moves toward an equilibrium, or balance. For example, if surface water cools and becomes denser, it will sink The density of water can also be affected by temperature. When the same amount of water is heated or cooled, its density changes. When the water is heated, it expands, increasing in volume. This is represented by the increase in the size of the box from Fig. 2.2 A to 2.2 C. The warmer the water, the more space it takes up, and the lower its. The weights of hot and cold water are actually very close to each other. This is because they are the same substance made up of the same types of molecules. The only difference is that the colder water will have its molecules closer together and will have a higher density

### Hot & Cold Water Science Experiment - Density Science Activit

Although it's considered easier to swim in denser water like salty seawater, it's primarily human physiology, rather than density differences, that make some temperatures better for swimming than others. Olympic swimming pool regulations specify 25-28°C, which tends to give the fastest records Cold Water Vapor: What causes a cloud to sink to the earth surface and we call it fog. Tiny droplets of water are present in clouds and fog. If the surrounding warm air is cooled it sinks since it is more dense, and at the same time the water as a gas is condensed into tiny droplets of water The reason warm water is more buoyant than cold is that its molecules have more energy and are moving around more. This makes warm water less dense and it will rise above denser, colder water. water but this effect would be too small to be noticeable. If you repeat the experiment with two containers, one with warm and one with cold water. 3. Cold water holds _____ salt than warm water, which makes it more dense. Cold water holds the same amount of salt as warm water. none of the answers are correct less more 4. Surface currents are a result of o Global Wind Patterns o Earth's Rotation o Density o All of the above 5 Cold water at 4c has 25% more hexagon molecule than water at room temperature, at 0c the hexagon increases to 27%, and reaches 100% at -35c!!!! Now, you can figure out whether cold or warm water is better for your body, in spite of all this controversy

### More Dense - Hot water or Cold Water ? - YouTub

Cold water gets absorbed quickly by the body as compared to warm or hot water. When you are back home from the scorching heat or if you experience a heat stroke, drink a glass of cold water Delta Variant May Cause 'Dense Outbreaks' in Parts of U.S. drink about 50 percent more cold or cool water compared to warm water when they exercise -- and as a result are less dehydrated. An older and small study from 1978, involving 15 people, found that drinking cold water made nasal mucous thicker and more difficult to pass through the respiratory tract Write down what you think will happen when you mix cold water and hot water. Fill two beakers with 150 ml (2/3 cup) of water. As soon as the sub's density is more than the water's, the sub will sink. because salt makes water more dense. Changing water density could cause a submarine to rise or fall unexpectedly

### Why does the ocean get colder at depth

Warm water generally gets more dense as it gets colder, and therefore sinks. This fact may lead you to believe that ice should form on the bottom of a lake first. But a funny thing happens to water as it gets even colder. Colder than 4° Celsius (39° Fahrenheit), water begins expanding and becomes less dense as it gets colder The cold water was starting to run warmer. No wonder they call him super. One day, after using the shower, we noticed the cold taps were running lukewarm water from every faucet-a problem I would come to learn is called hot-cold crossover. This wasn't some simple, obvious leak, either-this one would take some detective work

THE FACTS . The claim is repeated so often that many people accept it as fact. But according to scientists, the notion that a body of cold water will reach boiling temperature more quickly than an. After an intense workout, drinking cold water when you feel hot can benefit your hydration needs. According to Columbia University, cool fluids leave the stomach faster than warmer ones, which allows for faster rehydration.To achieve this effect, you should drink water within the 59 to 72 degrees Fahrenheit range to cool you from the inside out When you shower with cold water, it does not strip your skin and hair of their natural oils. Cold water closes pores, which tightens the skin. It is also gentler on your hair and prevents hair fall. C. Makes You More Alert And Energetic. In the morning, the cold spray of the shower hitting your body shocks you into being fully awake As the temperature continues to drop, the water on the surface may get cold enough to freeze and the lake/ocean begins to ice over. A new thermocline develops where the densest water (4 °C (39 °F)) sinks to the bottom, and the less dense water (water that is approaching the freezing point) rises to the top So you can get as cold as about -1.9 C in the ocean before freezing, and water as cold as that sinks to the bottom. (Or at least it tries.) One part of our story, then, is that the deep ocean is cold, very cold, because cold water is denser than warm water and salt water gets denser all the way to its freezing point