[Zziggywolf5]

..... ANSWER!

I don't know!

[Rylkan]

Well, since you at least answered, it's your turn. They are cross sections in particle physics. One is the cross section of an electron photon interaction, the other is an electron neutrino interaction.

[Zziggywolf5]

Ooh, my turn. Shame I haven't thought of a question...
Uh.. Okay, something easy.
Why are giant insects impossible?

[Rylkan]

I don't know, but I am thinking of the physics. It would seem very inefficient to have an exoskeleton as you get larger. Especially considering joints need to be angle to support more stress, and as you get larger, the sheer forces would be rough on something without an internal structure to help it along.

[Zziggywolf5]

I don't know, but I am thinking of the physics. It would seem very inefficient to have an exoskeleton as you get larger. Especially considering joints need to be angle to support more stress, and as you get larger, the sheer forces would be rough on something without an internal structure to help it along.

Correct.
I was hoping for the actual name, but you explained it well enough. Sorry it took so long to reply.

[Rylkan]

Where do planetary nebula come from?

(Oh, and what is it called? I still want to know )

[Zziggywolf5]

(Square-cube law.)

[Rylkan]

Ahh, probably working off area vs volume then, that makes sense.

[Zziggywolf5]

Hint plz.

[Rylkan]

They come from dead stars. (HUGE Hint. )

[Rylkan]

Right, I guess I am a thread killer. ::will leave this thread alone so it can thrive.:: ;(

The answer, though, is by small stars. Since our star is attempting to maintain Hydrostatic Equilibrium, if the temperature goes up, it expands a bit, thus cooling it off. And if it collapses, the heats up, making it expand. This works for it's main cycle life time, but when it gets old and used up most of it's fuel, it can't do this so well. The inner portion get denser so it can burn other materials, thus increasing the heat and causing the outer layers of the star to puff out. This is the Giant Phase of a star. Eventually for low mass stars, it just loses it's oomph, and the center slowly stops burning things at all, and the "wind" from that core continues to push away the outer layers. So you are left with a white dwarf in the middle of a Planetary nebula, which is the gas that used to be the outer layers of the star.

[Moogalite]

I would of answered but my questions kill threads too

[Rylkan]

Kind of a sad thing that it does that. I've been trying to post simpler stuff lately too.

[Aaron]

We are not learned in your ways!

[skenasis]

Rylkan, we aren't all astrophysicists Simple stuff for you = o_O for most of us.