What substance weighs more in its liquid form than it does in its solid form?

water

water

I think it's Mercury.

Mercury? Dunno!

um....mercury??

Mercury.

I'm not sure, is it mercury? I was just looking at the thermometer out side and it made me think of it. (supposed to get to 105º today)

Do you mean is denser in its liquid form? That would be water; that's why ice floats.

Water?

Mercury?
Cheezy poofs?

water

Mercury?

This sounds like the question about which weighs more, a ton of lead or a ton of feathers?

water/ice?

Water weighs more per unit volume in its liquid form than in its solid form.

water?

What??? I have no idea. Some non-Newtonian substance?

I am guessing everything, since techniclly, heat is just nothing more than internal energy, and energy, allthough nearly neglectalbe, still is made up of a very small mass. For instance, frozen water might weight in at 50 lbs, but that same water heated up to its liquid form might weight in at 50.000000000000000072 lbs.

ok, but honestly, I dont know.

Dirt? Styrofoam? Lead? Oxygen? I have no idea. I could keep guessing...Water? Feathers? Wood?

This actually strikes me as a weird question. How can something weigh more without adding to it?

this question's really about density. Density is mass per volume - what material is more dense when liquid than when solid? Most materials are more dense when solid, but water isn't - given that ice floats in liquid water, ice is less dense (less mass per volume) than water is.

for some reason, I'm having problems grappling with the idea of "liquid feathers".

spoo

For those who said water, you are correct. And, our science teacher, Mr. Romkey, gave a great explanation.

If you're referring to equal volume then I would guess water.

Hey! You answered too fast! My answer came after yours!
(and I didn't even check!)

Even feathers have a melting point!

To quote another SC recently 'Because it's ICE!'

You're ready for this one then:
If you held a rifle parallel to some smooth earthly surface like the ocean or a salt flat, shot the rifle and simply dropped a bullet (from the same height) at the same time, which bullet would land first?

*shudders*

well, first off, considering the fact that the earth is round, the bullet dropped will hit the earth first, since the shot bullet will have to take a longer distance to hit the earth. Since the bullet is going in an oribital direction, it would actually be breaking away from the gravity a bit.

But, from your assumption, assume that the earth is flat, right? In that case, the shot bullet will become hotter from the gun shot, thus expand, and hit the earth a few molecules first. This is based on the premise that we are being that presice, and both bullets are calibrated for their center of mass to be so near each other.

But not to outdo myself (smart-ass wise), this all, however, is neglecting air friction, which would actually have the droped bullet hit the earth a faster, since the shot bullet is taking a longer route, thus collide with a greater number of air paritlces.

With all this in mind, fact 1 & 2 should cancel with fact 3, so then this all depends on to what extreme these factors are playing into this eqaution. We'd have to know what the surrounding air presure is (assuming its all equal in all parts), the original height of the two bullets, and not to out-do ourselves, the local geography of the land (flat, hilly, platue, plain *)

* on top of all that, we would have to know the curvature of the earth at that particular point. For instance, the earth is more curvier half way between the equators and the poles, or something like that.

did you mean which one "WEIGHTS more in its liquid form.." OR did you mean which one is more DENSE???


Weight, dont they all weight the same for the amount of matter they take up.

Density, water is one of the very few substances that actually becomes less dense as it goes to its solid state; however; it is NOT the only substance.


Therefore, techincly, everyone who said water is correct, however, water is not the only correct answer to this question.

"did you mean which one "WEIGHTS more in its liquid form.." OR did you mean which one is more DENSE???


Weight, dont they all weight the same for the amount of matter they take up."

You getting that from southernyankee is precisely why I suggested you add a "per unit volume" clause - I knew there was a reason

You overthink

Just like me. I used to sit exams that were designed to get progressively harder. I would get all the early questions wrong and then not drop a mark on the later questions, even though the early questions were designed for people far below tha standard we were supposed to have reached at that age.

That has happened to me before. I used to get easy questions wrong because I was thinking as though they might be trick questions.

Okay. Point taken. I guess I'm an idiot. The question made perfect sense to me the way it was written. I guess I just have a simple mind.

We wouldn't want to be around to find out what feathers smell like when they reach their melting point...

Water?

'earth is round', that's all I was looking for.
but only horizontal vectors on the increased air friction.

well, I am not sure about that. Air friction is proportianal to the absolute speed. If the bullet is going a certain speed horizontally + the speed going down (using the patagorain square root of the squares off coarse), then more frictional retardation will occur, against the total abosulte speed, right? I'll have to do more math to figure that one out.

Here I am trying to figure out some relationship to Patagonian shoe cleaning rats, and you mean pythagorean. Have you had any calculus yet? Perhaps you're ready for my Fermat's Last Theorm proof.

yes, I had about 3 'semesters worth'. I know a bit about parametric, taking derivitives, double derivitives, infintate polymonials, anti-differiating things like cos to the forth times sin to the 5th, that kind of stuff. Though I am not that good at proving stuff. Never heard of Fermat.

All you need is the basic concept of limits here.
Fermat said that the pythagorean theorm only holds true for the power of two. A quick (20 min.) graphical proof of that isn't tough, though mathematicians have struggled with over complex approaches to the problem for 300 years now.

I have no idea

Water, but that's just an uneducated guess.

water???????

I have no clue...Oxygen??? Water? Mercury? (though I've never heard of solid mercury...or oxygen for that matter) *shrugs* who knows

Kristal...are you basically asking the question....If a plane drops a bomb, at what point is the plane in relation to the bomb when it hits earth??? B/c if this is the case, the plane is directly above the bomb when it hits earth. The reasoning (in non-mathematical/scientific terms) is b/c the bomb maintains the same speed as the plane does at the time of release

Not at all. The example you site is of comparative inertia. My example was about comparative gravitational pull. In your example, the plane is actually ahead of the bomb somewhat because the plane maintains continuing thrust to overcome the frictional forces at that velocity. In my example, gravitational acceleration forces downward are the same for both the bullet with a forward velocity vector and that with none, so the only difference is the slight difference in ultimate distance they have to drop due to the earths curvature.
A close tangent at least.

Mercury?