Naked Science Forum
Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: The Scientist on 03/07/2010 10:02:26
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Please provide explanations. Thanks!
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The litre of water weighs more, and this is why ice floats in water. When water freezes, it expands and becomes becomes less dense. While it is true that most things are more dense in their solid state, it is not true of water.
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I agree with Carbonizer. Water is heavier
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Would this distinction hold in zero gravity?
I would think not, but I've been wrong before. :)
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Would this distinction hold in zero gravity?
I would think not, but I've been wrong before. :)
I think you are correct.
1 L of water is more massive than 1 L of ice. This will translate into greater weight if any force is applied to the samples.
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It depends. A litre of ice can have a density of 1.65 times that of normal water, so I'm going with ice, unless it's specified to be at normal pressure, in which case it's water that is denser:
https://en.wikipedia.org/wiki/Ice_VII (https://en.wikipedia.org/wiki/Ice_VII)
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This chart suggests that even at -200C, ice is less dense than liquid water at 100C.
I assume that this is taken at standard pressure, so that no exotic phases of ice were present.
https://en.wikipedia.org/wiki/File:Density_of_ice_and_water_(en).svg
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Would this distinction hold in zero gravity?
I would think not, but I've been wrong before. :)
Water would still be more dense so if you had a comnination of water and ice in a centrifuge aboard the ISS the ice would still float to the surface of the water. But since nothing weighs anything in a weightless environment they its meaningless as you said.
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I guess the answer to this question is slightly open. Water is actually denser than ice at one liter. So I would say water. And if the same one liter of water gets frozen it even gain more on its volum
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I guess the answer to this question is slightly open.
The question was answered 10 years ago by the first reply. Any reason you are finding the need to dredge up all these old threads asked by people no longer active on the site?
Water is actually denser than ice at one liter.
This comment makes it sound like ice might be more dense than water at a different volume.
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Isn't 1kg of iron=1 kg of wool?
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Isn't 1kg of iron=1 kg of wool?
yes, but liters (volume) ≠ kg (mass)
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Isn't 1kg of iron=1 kg of wool?
yes, but liters (volume) ≠ kg (mass)
I know, but the question was about weight, not about mass, volume or density.
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I know, but the question was about weight, not about mass, volume or density.
The (11 year old) question was about the weight of two equal volumes, not the weight of two equal masses.
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I know, but the question was about weight, not about mass, volume or density.
The (11 year old) question was about the weight of two equal volumes, not the weight of two equal masses.
The word volume is not even mentioned, it asks only about the weight.
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The word volume is not even mentioned
The word "litre" is used, and that specifies a volume.
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I know, but the question was about weight, not about mass, volume or density.
The (11 year old) question was about the weight of two equal volumes, not the weight of two equal masses.
The word volume is not even mentioned, it asks only about the weight.
Litre = volume.
Now is is true that 1 litre = ~1.057 qt. , and 1 qt = 32 fl oz.
Since an ounce is a measure of weight, I could see where someone might make the mistake of thinking a litre could also be a weight.
However, qts are measured in "fluid ounces", and fluid ounces are units of volume, not weight.
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Ah, ok, I thought the weight was only about the attraction towards the Earth, measured in Newton, and the mass is measured in Kg, regardless of temperature or gravity.
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The fact remains that a liter of water has a greater mass than a liter of ice, and therefore in any gravitational field, a greater weight. Temperature is important (or irrelevant, depending on how you look at it!) because at ambient pressures you can only have both ice and water present at 273.15K.
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I think a liter of water
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These posts are very interesting. They lead me to wonder: Suppose we think about so-called "heavy water".
You know what I'm referring to. The water used in nuclear research, such as making the atomic bomb.
How much heavier is it than ordinary water, and if it's frozen, is its ice heavier?
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How much heavier is it than ordinary water
About 10%, whether it's solid or liquid (or gas, come to that)
"Heavy ice" will sink in ordinary water.
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Depends on what you are holding it in.
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Now is is true that 1 litre = ~1.057 qt. , and 1 qt = 32 fl oz.
Only in the USA.
A quart is 2 pints (a quarter of a gallon) wherever you are. But a US pint is 16 fl oz, whilst an Imperial pint is 20 fl oz, which is why the US gallon is 6 Imperial pints but 8 US pints, i.e. 4 quarts. This partially accounts for the poor published fuel consumption of American cars: a British car is 33% more efficient!
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Why is the US so resistant to the metric system.
I think that in the early years of the Space Age, it was because US astronauts might get confused in an emergency.
Such as a meteorite puncturing the thin metal skin of their Mercury, or Gemini space capsule.
In such a case, the astronauts might radio to ground-control: "Houston, we have a problem. We have a leak. Our oxygen is rapidly venting"
Houston might reply: "Roger, to plug the leak, insert stuffing into the hole. It's 16 centimetres to the left of switch A on your console"
The astronauts would reply: " Say that again, Houston, what's 16 centimetres ..... agh , we can't breathe......"
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A liter of water weighs more than a liter of ice ,water has a unique property of being less dense in its solid form.I know this but I can’t explain it.but ice floats on water so it’s lighter,this is why they call it a liter.we use inches because it’s American we should endeavor to force the world to accept the inch system on the rest of the world so they would have to buy measuring instruments from the U.S.if you want to rule the world get an Emperor,if you want to rule the universe get a scientist! :o :o
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water has a unique property of being less dense in its solid form
It's not unique. Tin does the same thing.
it’s lighter,this is why they call it a liter.
No, it's not.
The word litre is derived from ancient Greek.
we use inches because it’s American
Inches aren't American; they are English.
Though the pre-revolutionary French had a similar unit.
https://en.wikipedia.org/wiki/Paris_inch
and I would imagine other countries did too.
we should endeavor to force the world to accept the inch system on the rest of the world
The British pretty nearly did that.
But after a while we realised it was silly, and went Metric.
We are waiting for the Americans to catch up.
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Although the difference between the American and the Europeon gallon causes confusion in the MPG figures there is an actual difference in the efficiency of engines because the low octane rating of the fuel means a lower expansion ratio must be used
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Although the difference between the American and the Europeon gallon causes confusion in the MPG figures there is an actual difference in the efficiency of engines because the low octane rating of the fuel means a lower expansion ratio must be used
I once told an American who was gloating about their petrol prices that a US gallon is smaller than Imperial. He didn't like it at all. Don't you know that everything is bigger in America?
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"Houston, we have a problem. We have a leak. Our oxygen is rapidly venting"
"Hello, this is NASA Houston here. We are currently experiencing unprecedented call volume, and all our operators are busy. Please be assured that your call is important to us. If you're calling to order a pizza, please press #, otherwise hold the line and your query will be dealt with as soon as possible. You are currently number 46 in the queue."
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Although the difference between the American and the Europeon gallon causes confusion in the MPG figures there is an actual difference in the efficiency of engines because the low octane rating of the fuel means a lower expansion ratio must be used
And the Americans measure octane number differently too...
Don't you know that everything is bigger in America?
Would these be the same Americans who think that " A pint's a pound the world around" (and wonder why they can't hold their beer) ?
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Why is the US so resistant to the metric system.
Because no metric nation has landed a man on the moon, and everyone knows (from hard experience) that altitude should be measured in feet if you want to make a soft landing on Mars.
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Inches aren't American; they are English.
Though the pre-revolutionary French had a similar unit.
https://en.wikipedia.org/wiki/Paris_inch
and until 1916 there were two British inches, so artillery shells made in Coventry didn't fit the cartridges made in Woolwich. That said, the metrics still lost the war.
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B C , I was not aware of differences in octane rating determination. I thought the n-heptane/isooctane standard was universal. Is there also disagreement on the diesel cetane rating? would love to know more on this.
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I guess the answer to this question is slightly open. Water is actually denser than ice at one liter. So I would say water.
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Water is actually denser than ice at one liter.
What does that even mean?
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Water is actually denser than ice at one liter.
What does that even mean?
It obviously implies that ice might be denser than water at volumes other than a liter. Maybe it's a metric thing where a liter of ice floats but ice is denser than water at a gallon, so a gallon of ice sinks. It sinks to the bottom until melting to a metric volume and then rises back up.
No?
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It obviously implies that ice might be denser than water at volumes other than a liter. Maybe it's a metric thing where a liter of ice floats but ice is denser than water at a gallon, so a gallon of ice sinks. It sinks to the bottom until melting to a metric volume and then rises back up.
Wow, this science stuff is confusing! ;D
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Maybe it's a metric thing where a liter of ice floats but ice is denser than water at a gallon, so a gallon of ice sinks. It sinks to the bottom until melting to a metric volume and then rises back up.
No?
Probably due to differences between US gallon and imperial. Convert to metric for water using one of those and ice with the other, but only at 1 litre, then you switch for other volumes? No, that can’t be right, I’ve got it the wrong way round, now I’m totally confused. I’ll try using drams to metric, or gills maybe. The answer must be in there somewhere ::)
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Water is actually denser than ice at one liter.
What does that even mean?
I suspect it means the poster forgot to say "1 kg/litre".
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A litre of water is heavier as compared to ice of same weigh. because the density of water is more than ice density
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Water would weigh more in its dense state compared to ice.