The cold water is slightly heavier. When liquids are heated, they universally expand, becoming less dense. Since the volumes are the same, the higher density (cold water) will be heavier

cold water is heavier

The heavier bucket!<br />
<br />
Which weighs less? Five Gallon Buckets of Feathers or a Five Gallon Bucket of Feathers?

LOL... don't cornfuse me here T..... *grins*

Five one gallon buckets of feathers- the five one gallon buckets will weigh more in and of themselves than the five gallon bucket will (assuming similar construction) because of the higher surface area that needs to be covered.

Cold water gets denser and heavier by volumn until it gets down to about 4 degrees C at which point it begins to expand and starts to get lighter again by volumn.

So, 5 pounds of COLD Water is Heavier than 5 pounds of HOT Water?

What if it's 2 Pounds of COLD Water in a 5 Gallon Bucket and 2 Pounds of HOT Water in a 7.5 Gallon Bucket?
Then which one is heavier?

Suppose it's 2 Pounds of COLD Water in a 6 Gallon Bucket and 3 Pounds of HOT Water in a 5 Gallon Bucket?
Then what?

OH! what happens when they Both Freeze!? Is the Heavier Bucket Colder than the Lighter Bucket?

The question was about quantity by volume, not by weight. My original answer stands, at most temperatures the colder water is heavier BY VOLUME.

OH! (Silly Me!)
Soooo ... The Louder the water is the the Heavier it is?
Does that mean that Water chilled down to Absolute Zero is Very Very LOUD and Weighs NOTHING?!
Does it float? .... In the Air, not in Water.
OR... Is it the other ways around? Extremely Cold (Frozen) Water is Quieter?

I don't know what's sadder; taking you seriously or assuming you think that passes for humor.

Sorry, I thought about it... I think I have it figured ou.
The Colder the water, the Quieter it will be; mainly because the molecules would be slowed down and make less sound. ... So that's solved.
But, since the Colder Water gets heavier, why does an Ice Cube Float in Hot Water.
Shouldn't it sink?

oh, Red,.... *grins* do be careful... he takes his humour VERY seriously.... *laughs*

I haven't seen anything from him remotely like something I'd call humor. So far he sounds like a 10 year-old with a serious head injury.

*smiles* Oh no, his head's fine.. and he's not 10.. in fact he's very intelligent.. he just likes fooling around on here. :)

No. Water contracts as it cools until it gets below 4degrees C. At that point it expands a lot until It freezes solid. Ice cubes are water that has expanded and, since they displace more volume than any liquid water, they float.

actually an ice cube wouldn't do much in hot water but melt immediately.......

Again, it depends on volume of ice vs. volume of hot water.

lol.. I suppose you have a point there. *grins*

Seriously now:
So you're telling me that a piece of ice at 3.75 degrees C. hasn't yet expanded and will not be "floating" like it would be at 5 degrees C ?
The "warmer ice" would be level with the water surface, but the "colder ice" will displace more water and rise out of the water! ?
The next thing you'll tell me, I suspect, is that 85 degrees C hot water will float/rise above 99 degrees C hot water!

Water freezes at 0 degrees Celsius. There is no warmer ice at 3.75 C or 5 C. All fluids stratify by temperature. This is why the deeper you dive in a lake, the colder the water is. It's also why hot air balloons rise.

Water is unique in that its densest state is above its freezing point. It's why ice cubes float in a glass. If you put dry ice (frozen CO2) in a bucket of liquid CO2 the dry ice would sink.

Well I meant -3.75 and -5 degrees C ... (cold enough to be frozen)...

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Hot water..there is no reason to lift and tote around cold water......

sure there is.... if you have to water animals... or your water's off for some reason and you want to flush... or you're watering plants outside, and don't have a hose...lol.. there's always a reason... *grins*

true....,in very few respects...

how cold is the cold water?

they both weigh 5 gallons...so they are equal

hot water will be less dense so the cold water

The colder the water the heavier because it is more dense