Template:Did you know nominations/Shock diamond

Shock diamond

 * ... that while normally associated with rockets and jet engines, shock diamonds (pictured) can also be produced by artillery, volcanoes, and quasars?
 * ALT1:... that while shock diamonds (pictured) bear no relation to the mineral diamond, they can be produced by volcanoes?
 * Reviewed: Pulangi IV Hydroelectric Power Plant
 * Comment: I prefer the main hook.

5x expanded by Chris857 (talk). Self nom at 02:41, 18 November 2011 (UTC)


 * Symbol question.svg Date, sourcing, and hook all check out. No problems with copying or close paraphrasing (the displayed approximation equation is copied from the source but that is unavoidable and unproblematic). I prefer the main hook, too — it's more informative. However, I count the new text length as approximately 3792 characters (not counting figure captions, equations, section titles, footnote marks, etc) and the old text length in this version (prior to the removal of a sentence) as 841 characters. So the expansion factor 3792/841 is around 4.5, not quite enough. Maybe you can expand it a little more to get it above threshold? —David Eppstein (talk) 17:13, 30 November 2011 (UTC)
 * I was counting from the version with the last sentence removed, which makes the expansion 5.2. I'll see if I can expand on what is written. Chris857 (talk) 19:16, 30 November 2011 (UTC)
 * I just added a section, hopefully this is now sufficient by your count. Chris857 (talk) 21:56, 30 November 2011 (UTC)
 * Symbol confirmed.svg Yes, good to go now. Strictly speaking the expansion is supposed to occur within a shorter window but it would be unfair to disqualify you for that, because the slow DYK review process meant that you didn't even find out about the problem for many days.—David Eppstein (talk) 22:13, 30 November 2011 (UTC)
 * Thanks. New material added is good all around. Chris857 (talk) 02:26, 1 December 2011 (UTC)