The Sandbox

Ever tried to tell someone how to use a particular bit of BB code, and had to tell them something like "remove the spaces to make the tags work"? Then you'll have probably given up and gone for a cigarette when they said "what spaces?" VB includes a tag called noparse which you can use for displaying BB code as normal text. Any BB code enclosed by the noparse tags will be ignored when the post is parsed and rendered to the browser. So, for example, if I take this... Bold text ...and surround it with noparse tags... Bold text ...you will see this: Bold text Try it out!

Tags are a relatively new feature on vBulletin forums, and from looking at the tags which have been added to threads so far it looks like a short tutorial might be needed. What are Tags? Tags are metadata keywords. This means that they are data about data, in other words they describe content. Why use Tags? Tags have several functions: They let members and search engines find content by keyword, They give a brief overview as to what the main subject of content is about, They allow content to be ordered into related subjects, They can show how popular a subject is. How should Tags be entered? When you start a thread, you can add tags t…

I've noticed my tex stuff is overcramped when displayed, these days so I'm finding out how to make it bigger. [math]{P_{n = 3}} = \left\{ {1 - {{\left( {\frac{5}{6}} \right)}^3}} \right\} = \left\{ {1 - \left( {\frac{{125}}{{216}}} \right)} \right\} = \frac{{91}}{{216}}[/math] It comes out bigger on my TEX editor, but is cut back here Any suggestions?

(I am testing latex, but no porn here) test1... [math]a[/math] test2... [math]{a}[/math] test3... [math]123a[/math] test4... [math]123.45\cdot a[/math] test5... [math]123.45\cdota[/math] test 6... [math]123,45a[/math] test7... [math]abc[/math] test8... [math]a \cdot b \cdot c[/math] test9... [math]a_b[/math] test10... [math]{a}_{b}[/math] test11... [math]a_{b}^{c}[/math] test12... [math]{abc}_{d ef}[/math] test 13... [math]a b /c[/math] (PN: not enoguh space between variables 'a' and 'b') test14... [math]a _{b }+3.1 \cdot {10 }^{-12}[/math] (PN: minus…

How can I start a poll on this site? I thought it might be useful to get the opinions of the community. Are there any special rules for polls? Am I allowed to ask about religion, political standing, and other sort of touchy subjects? Thanks.

The forum FAQ is here: http://www.scienceforums.net/forum/faq.php The list of BB code we use is here: http://www.scienceforums.net/forum/misc.php?do=bbcode

http://www.youtube.c...h?v=n9KaI5T0zRw Hooray! Now to see if I can get the two in the one post. http://www.youtube.com/watch?v=n9KaI5T0zRw Seems that two in the one post broke it.

diff comp I hope it doesn't merge again It did

Question: Is surface tension holding the photosphere together more than the Gravitational fields ??? Judging by the way Solar storms rip thru the Photosphere then contracting back to reform, it seems that the Photosphere is more in surface tension not gravitational compression. http://solarscience.msfc.nasa.gov/feature1.shtml Storm watching: http://www.youtube.com/watch?v=91H4qgFCauQ zorro

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Just trying [math] for the first time... (Vfy)^2=(VisinΘ)^2+2ay⋅Δy [math] V_{fy}^{2} = V*sin( \phi )^{2}*2a_{y}* \Delta _{y}[/math]

\[\frac{\Delta y}{\Delta x} = \frac{f(x+h)- f(x)}{h}\] \[\Delta y \] \[ y = \int f(x) dx \]

Can someone please post a 2x2 LaTex matrix and set it equal to a variable so I can click and get the code? I need to ask a mathy question that involves matricies, and I can't find one posted in the archives. -thanks

Material Safety Data Sheet (MSDS) for Sodium lauryl sulfate gives the following information: Section 11: Toxicological Information WARNING: THE LC50 VALUES HEREUNDER ARE ESTIMATED ON THE BASIS OF A 4-HOUR EXPOSURE. Acute oral toxicity (LD50): 1288 mg/kg [Rat.]. Acute toxicity of the dust (LC50): >3900 mg/m 1 hours [Rat]. 3MUTAGENIC EFFECTS: Mutagenic for bacteria and/or yeast. May cause damage to the following organs: skin.Hazardous in case of skin contact (irritant), of ingestion, of inhalation. Slightly hazardous in case of skin contact (sensitizer).Special Remarks on Toxicity to Animals:Lowest Published Lethal Dose: LDL [Rabbit] - Route: Skin; Dose: 1000…

Post number 1 - Submit

A quick question, as I wish to know this, rather than playing around with precious reputation points, but if I am to unselect the approve button beside a reputation comment, does that transform it into anti- reputation, which works against a user, or something along those lines? (yes I know, not a real word...) Or does it rather simply mean the comment is not meant to boost reputation, but is merely conversational? ps: Anti- reputation reminds me of anti- matter, just without the fuss of mass- destruction, and death.

[math] \sqrt{x} [/math]

[math] m\left(\sqrt{(x - j)^2 + (y - k)^2}\right) = n\left(\sqrt{(x - r)^2 + (y - s)^2}\right) [/math] get rid of roots [math] m^2\left((x - j)^2 + (y - k)^2\right) = n^2\left((x - r)^2 + (y - s)^2\right) [/math] multiply out brackets [math] m^2\left((x^2-2jx+j^2) + (y^2-2ky+k^2)\right) = n^2\left((x^2-2rx+r^2) + (y^2-2sy+s^2)\right) [/math] multiply through [math] m^2x^2-2m^2jx+m^2j^2 + m^2y^2-2m^2ky+m^2k^2 = n^2x^2-2n^2rx+n^2r^2 + n^2y^2-2n^2sy+n^2s^2 [/math] gather like terms [math] m^2x^2 - n^2x^2 + m^2y^2 - n^2y^2 -2m^2jx +2n^2rx -2m^2ky +2n^2sy = +n^2r^2 +n^2s^2 - m^2k^2 - m^2j^2[/math] factorise a bit [math] (m^2 - n^2)x^2 + (m^2 - n^2)y^2 -x(2m^2j -2n^2r…

help button suggests these tags for LaTeX... [latex...] [latex]y = \sqrt{4x^2}[/latex] a thread gives these tags... [math...] [math]y = \sqrt{4x^2} [/math] edit: turns out both work

finding acceptable double arrows for chemical equations [math]Fe{\left( {OH} \right)_3} \Leftrightarrow F{e^{3 + }} + 3{\left( {OH} \right)^ - }[/math] [math]Fe{\left( {OH} \right)_3} \leftrightarrow F{e^{3 + }} + 3{\left( {OH} \right)^ - }[/math] [math]Fe{\left( {OH} \right)_3} \mathbin{\lower.3ex\hbox{$\buildrel\textstyle\rightarrow\over {\smash{\leftarrow}\vphantom{_{\vbox to.5ex{\vss}}}}$}} F{e^{3 + }} + 3{\left( {OH} \right)^ - }[/math]

test

L=1/γ=1−v2−−−−−√ dL/dt=−γva=vn+1−vn ∂v/∂n=(vn+1−vn)/1=−γva H_z=H_o\sqrt{\Omega_m(1+z)^3+\Omega_{rad}(1+z)^4+\Omega_{\Lambda}} [math] H_z=H_o\sqrt{\Omega_m(1+z)^3+\Omega_{rad}(1+z)^4+\Omega_{\Lambda}} [/math] av

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\int_a^{\infty} f(x)dx=\lim_{L\to\infty}\int_a^{L}f(x)dx

You all probably know about the consecutive post merger already, which combines consecutive posts in a thread if they come from the same member. Sometimes knowing where one post ends and another begins would be helpful. So is this better? Wait for it... Merged post follows: Consecutive posts mergedHere's my second post in this thread Previously, there was no indication in the merged post as to where the original post ended and the subsequent post began.