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It's because the water molecules in hot water are charged with thermal energy, making them fly about all over the place. The molecules move slower in cold water, because they lack the energy to go any faster.
In short, hot water is closer to being a gas than cold water, and cold water is closer to being a solid than hot water.
A volume of water placed in a sealed container will weigh the same at all temperatures.
However, the density of water increases as it cools. Therefor a fixed volume of water taken and weighed when the water is 100 degrees C will weigh less than the same fixed volume of water taken and weighed when the water is 4 degrees C.
Below 4 degrees C water begins to expand (lose density) as it begins to form ice (which ofcause floats on water) and this would mean that the fixed volume of Ice water would weigh less than the fixed volume of hot water.
Water of a lesser temperature does not have molecules that vibrate as much as warmer water. It thus takes up less room and yet keeps the same mass and so is denser. Mixed with warmer water, the cooler water will tend to sink.
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What differences are there when you use hot or cold water in a lava lamp?
hot water contains more energy than cold water. cold water causes the water molegules to vibrate more.
Does hot water weigh more than cold water?
According to the engineering toolbox website ( http://www.engineeringtoolbox.com/water-specific-volume-weight-d_661.html ) at 32 degrees Fahrenheit the weight/density measurement is 62.41 lb/ft3 at 240 degrees Fahrenheit it reduces to 59.08 lb/ft3
Are molecules in hot water different then molecules in cold water?
If you have the same volume of both then there are in cold water more molecules.
Why do you feel more cold after taking a bath with hot water as compared to cold water?
because when you get out of the baths of hot water its a bigger change in temp rather than after you get out of one with a cold water than the temp in te house will be warmer than ur bath
Is hot water less dense than cold water?
Yes, because the higher the temperature, the faster and more spread out the molecules, therefore making hot water less dense than cold water.
Does cold water weigh less than hot water?
No, cold water weighs more (for a given volume) than hot water. This is why there is a thermocline in bodies of water. But when water freezes, the solid form weighs even less (for a given volume), this is why ice floats.
Is it true cold water weighs more than hot water?
bcoz cold water has no vapours n hot water has hot water vapours which dries faster n bcomes lighter than cold water
Does crude oil weight more than water?
water weighs more than Crude Oil
What weighs 50 percent more than a gallon of water but when its weight is reduced by 50 percent weighs less than a gallon of water?
A gallon of water weighs about 8.3 pounds. The answer is ice. Ice weighs around 12.45 pounds, which is 50% more than a gallon of water, but when it melts and its weight is reduced by 50%, it weighs around 6.225 pounds, which is less than a gallon of water.
What is more dense cold water or warm?
cold ocean water is more dense than warm water
Is warm salt water more dense than cold salt water?
Cold water is more dense.
Does a muscular person weigh more or less in water?
You haven't said "more or less" than what. He weighs more than a beach ball and less than a manatee. Everybody weighs less in water than they do out of it. But every person weighs more than some other people and less that some other other people, whether any of them are in or out of the water.
What weighs more water or acetone?
Water weighs more than acetone. This is because water has a higher density than acetone, meaning that a given volume of water will have a greater mass compared to the same volume of acetone.
What weighs more a gallon of water or a gallon of gravy?
A gallon of water weighs more than a gallon of gravy because water is denser than gravy. The weight of a gallon of water is about 8.34 pounds, while the weight of gravy can vary depending on its ingredients, but typically is less dense than water.
Is cold water more or less dense than warm water?
cold ocean waer has more dense than warm water.
Does a pitcher of water weighs more or less then or equal to a pint?
more than
What weighs more water or air?
Water weighs more than air. This is due to the density of the substances - water is much denser than air, so a given volume of water will have more mass (and thus weight) compared to the same volume of air.
