[Ratty]

Eh... since the last question was a somewhat silly one, i'll ask a new question. Yay for physics.

Two identical rooms in a house are connected by an open doorway. The temperatures in the two rooms are maintained at different values.
Which room contains more air?

[Neraphym]

Let's see... both rooms have the same volume, so the pressure of room one divided by its temperature equals the pressure of room two divided by its own temperature. The room with the higher temperature must have higher pressure. But since they are connected, that means high pressure and temperature will flow into areas of low P and T. With everything flowing into the colder room, I'm guessing it will end up with more air, assuming there is air in the system to begin with, and that the rooms are connected horizontally and isloated from the rest of the house, and prolly 50 other control variables.

[Ratty]

Heehee. So. The room with the colder temperature.

Yes. Your question. =P

[Neraphym]

Why can't an object accelerate to the speed of light?

[Zoo]

If I recall , it would take an infinite amount of energy...

[Neraphym]

Yes, but your explaination was not sexy. Your question.

[Zoo]

Well .

Anyway. What must a... we'll go with caterpillar... do when it molts after its last instar (basically a period of growth between molts) to become a chrysalis?

[Neraphym]

Undergo a period of non-growth?

[Zoo]

Nope. It's something that happens really fast, at the moment of that last shed.

[Neraphym]

Pueberty?

[Zoo]

Heheh, nope, that happens a bit later, when they turn into soup, then reform into a butterfly. This is something they have to do, or else they fall on the ground.

[Zziggywolf5]

Heheh, nope, that happens a bit later, when they turn into soup, then reform into a butterfly. This is something they have to do, or else they fall on the ground.

Wait, catapillars melt in the chrysalis? I... did not know that.

Okay, answer: Um. Become... a pupal..

[Zoo]

Wait, catapillars melt in the chrysalis? I... did not know that.

Essentially. Their metamorphosis is MUCH more involved than an amphibian's.

Okay, answer: Um. Become... a pupal..

And no, that -is- what happens, as the chrysalis is their pupa stage, but what what they do the moment that last shed happens, they have to let go of the little silk pad they spun to hang on to, drop the old skin, then grab onto it again, before they fall down. It's quite impressive.

Somebody else take the question, I either ask too easy or impossible

[Phalanx]

ok umm lets see..... what is the strongest composite material suitable for building construction and why?

[Goto]

Just to add on to that earlier comment about light... Red, Green and Blue are considered the primary colours of light, yes. The reason why is a little bit arbitrary, but sensible nonetheless. Humans have three types of colour receptors. Red, Green and Blue were chosen as primaries because using them it is possible to just about independently stimulate the three different types of receptors. I guess this allows a wider range of colours to be produced if RGB is used, maybe? Most animals have two types of colour receptors, some have four. This would lead to a different number of primary colours, and of course in different species the primary colours would correspond to different frequencies. Actually there's a theory that some human females are born with an extra type of receptor, with yellow being the fourth primary for them. Even for people with 3 types of receptors (and thus 'normal' colour vision) everybody has slightly different peak response frequencies, so they'd still see colours slightly differently. Yay for wikipedia, boredom, and too much spare time though. I have to say I'm a little confused though, Wiki says that some humans are partially or fully tetrachromatic (4+ types of receptors), like I said above. Then in a different part of the article it explains that tetrachromats (mostly referring to species that naturally possess 4 types) can see into the ultraviolet range of the spectrum. I wonder if that means that there are humans that can, too.


About the current question, no clue what would be the strongest. As for why, construction is usually about compromise. The strongest materials might also be the heaviest, or the most expensive, or strong against compression but with a weak tensile strength. Metals corrode, which can be a problem. You don't want building materials to deform over time, but neither do you want them to be too brittle. Composite materials can often combine two materials with quite different properties to obtain a better choice, but even then there are still going to be tradeoffs. The 'strongest' suitable is probably only strongest because others aren't suitable. Since I probably should at least have a stab at the first part of the question, I'll choose an unsuitable material. Some forms of spiderweb are considerably stronger than modern alloys such as steel. Not really used in construction currently, but a synthetically produced material similar to spiderweb could be quite useful when tensile strength is needed. After all, just look at Spiderman.