They do not teach this in college.

Depends

The water, since it's more dense.

If the cups are the same size, then the water would be, as ice takes up more room than water of the same quantity. Plus, there's the issue of the cubes, so you couldn't stack the cubes efficiently enough (it wouldn't fill the entire volume like a liquid would).

If the cups are both full of an equal amount of water, then I think they weigh the same.

If both cups are filled to the top with water/ice then the water cup will be heavier. Water expands slightly when frozen.

I'm sure there's a chemistry person who can confirm/correct that.

edit: darn CM sniped.

CM's explanation was more detailed, but mine was more efficient. I demand credit!

It would have been better to ask if you had two cups of the same sized filled with an identical amount of water, though in one of the cups, the water is frozen solid. Which will weigh more?

Another factor would be the sources of water.

Perhaps one cup had water from the tap with chemicals and chlorine and such, and the other was taken from a sparkling lake in the middle of the alps. The chemicals might be less heavy than the water.

Mm C cups

Why are the cups not filled with booze?

Which weighs more a pound of water or a pound of bricks?

Who knows...... they don't measure water by pounds!

the same molar quantity of ice and water is the same weight.

But ice is less dense, and ice (cubes) will have gaps between each cube in the Cup.

DUDE ITS TOTALLY LIEK THE ICE GLASS THAT IS LIGHTER

if(getThingFlags(source) & 0x8){
  do her}
elseif(getThingFlags(source) & 0x4){
  do other babe}
else{
  do a dude}

If you have a feather (0.0001 g) and mb (3.2x10[sup]7[/sup] kg) neglecting air resistance which will hit the ground first?

How much wood would a woodchuck chuck if a woodchuck could chuck wood?

Well, I don't know, go ask a woodchuck.

... ... WHY DIDN'T YOU TELL ME WOODCHUCKS CAN'T TALK WAAAAI

Mb.

His immense gravitational pull will pull the ground towards him.

No... the ground will hit him, and so will the feather. So it never hits the ground.

That's neither relevant nor insightful.

What CM said, or to be more concise what Wolfy said.

you make a good point sir

Change the cup of water to Bud Lite and the question still remains the same.

bud lite is not booze you uncultured redneck swine

more like watered down piss

He never said it was booze, and I'm sure he was referring to it like it was water..

This would be the proper way to ask this if you were trying for a trick question, since then the answer would be "equal", as it's the same amount of water.

That's just another form of the "What weighs more, a 100lbs of feathers or 100lbs of rocks?" question though.

I know the 100lbs of x and y = the same weight. Though to be honest I was unsure as to whether or not an identical amount of water and ice would weigh the same or not. Although they are inherently the same before temperature is thrown in, I would have assumed that the molecular makeup of ice would have been more tightly compressed, thus possibly making it heavier?

I'm pretty ignorant when it comes to chemistry, so I'm sure that I'm completely wrong, I was just curious.

Per unit volume, water is heavier because it is denser.

There is no clear answer to the question without knowing the volume of the contents in each cup.

1. By "amount" do you mean by mass, or volume?

2. If you have a substance, and weigh it, then compress it in a way as to change the molecular makeup, it will still weight the same. You're only changing the density by compressing it, not the mass.

Density is defined as mass over volume. (d=m/v or dv=m) Mass doesn't change unless you're adding more water molecules or taking some away (ie, chipping pieces off the ice cube). Therefore, with mass not changing, a decrease in volume would mathematically call for an increase in density. Or in the case of water freezing, the increase of volume calls for a decrease in density.

3. Water doesn't compress when frozen, it actually expands (unlike most known substances). If water got more dense when it froze ice wouldn't float in your glass, glaciers and ice would sink to the bottoms of the oceans, oceans would freeze solid, and we'd all die.

boring.

would a woman with an e cup (natural) be heavier than a womaon with an e cup (all silicon) (same type of e cup)
i dont know the composition of fat so im not sure about this one

If you had a cup of water and the cup was made of ice and you put it on a conveyor belt, would the cup melt before taking off?

Only when the amount of water was 0.9repeating.

VISUAL AID!

I know, I just wanted to see what people would say.

Oh you.

The silicone is more dense. Of course, it isn't that simple since fat density varies, and the composition of breasts is more than just fat, although perhaps not significantly much. In all likelihood silicone's density is higher enough to be reasonably sure that the fake jugs weight more.