User talk:Glengarry

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Cheers, Sam [Spade] 02:29, 15 Jul 2004 (UTC)

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Hello,

This is Ben, username bmord. I responded to a posting by you on the 2nd law of thermo discussion page a while back, discussing why optics and solar pannels can't be used in the long run to produce temperatures greater than the Sun. I realize now that Solar pannels can be thought of as a sort of heat engine, and that this permits us to derive a function from the 2nd law and blackbody radiation considerations alone describing the upper limit on solar pannel efficiency as a function of solar panel temperature. I don't know if this derivation has been performed before, though I'll guess it probably has. I'm just reaching out to see if you would be interested in discussing further. If so, then leave me a message by editing the discussion tab of my user page. user:bmord

-Ben

Hello again,

I just now saw the note you left on my discussion page some months ago about your update to our discussion about using solar energy to create temperatures higher than the sun. Sorry for my long absence, life pulled me away from wikipedia editing for a time. Thank you for the references you found! Those are on point for questions that I've been grappling with lately, and should also help with my growing interest in solar energy. I look forward to reading them. Bmord 02:38, 3 August 2006 (UTC)

pH meter
My apologies, I posted this to your user page in error. I have removed it from there and put it here where it belongs.

The 7.01 and 10.01 that you refer to are the buffer solutions for calibrating the pH meter. There are actually 2 regimes available but by far the most common is the 3 point calibration using buffer solutions of pH 4.01, pH 7.01 and pH 10.01. These pHs only being valid at 25 °C. These buffers are readily available from any of the pH meter suppliers, either as powders to disolve in deionised water or ready made up. Why the solutions have the extra 0.01 pH on what would otherwise be a round number is unknown to me.

Some of the simpler auto-calibrating meters (such as the Hanna pocket models) only calibrate using 2 points, either 4.01 and 7.01 or 7.01 and 10.01. You pick the pair that correspond to what you are intending to masure.

I B Wright 09:34, 20 August 2007 (UTC) I B Wright 18:12, 4 September 2007 (UTC)

Poisson's ratio (17:19, 28 January 2008)
Good edit! Nahraana (talk) 17:28, 28 January 2008 (UTC)

Article Edit
If you have any further concerns about the article on Transparent alumina, please respond on the discussion page for that article. Thanks :-) -- logger9 (talk)