User talk:Khokkanen

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Thanks for the tips. I'll remember to sign my talks now that I know how to do it properly. --Khokkanen 7 July 2005 14:31 (UTC)

Relativistic kinetic energy example

I calculated this as an example of an object at relativistic speeds: 1 kg object at 0.8 c would have kinetic energy of about 60 PJ (accurately it would be 59917011915787842 and two thirds J). That would make the kinetic energy in such an object little less than a third of the yield of Tsar Bomba. Is this anywhere near the actual value? How would I calculate the "yield" of this kind of projectile? --Khokkanen (talk) 23:35, 7 June 2010 (UTC)

This Discussion page is primarily about the article Kinetic energy. If you don't receive a prompt answer to your question I suggest you delete it and re-post it at WP:Reference desk/Science. Dolphin (t) 02:20, 8 June 2010 (UTC)

$E_{k}={\frac {mc^{2}}{\sqrt {1-(v/c)^{2}}}}-mc^{2}$. The factor gamma-1 at 0.8 c is 2/3. Thus an object will have a kinetic energy 2/3 that of mc^2. A kg is 21 megatons, so this energy is 2/3 of that, or 14 megatons. This is 14/50 = 28% of Tsar bomba, so your calculation is indeed correct (quite a glowbomb, as Vinge would say). Another way of looking at this is that the 50 megaton yeild of Tsar Bomba is 50/21 = 2.38 kilograms of heat, light, and other forms of active energy. SBHarris 02:52, 8 June 2010 (UTC)

Nomination of Monomolecular wire for deletion

A discussion is taking place as to whether the article Monomolecular wire is suitable for inclusion in Wikipedia according to Wikipedia's policies and guidelines or whether it should be deleted.

The article will be discussed at Wikipedia:Articles for deletion/Monomolecular wire until a consensus is reached, and anyone is welcome to contribute to the discussion. The nomination will explain the policies and guidelines which are of concern. The discussion focuses on high-quality evidence and our policies and guidelines.

Users may edit the article during the discussion, including to improve the article to address concerns raised in the discussion. However, do not remove the article-for-deletion notice from the top of the article.  — Crisco 1492 (talk) 13:19, 19 January 2014 (UTC)