Return-Path: Received: (qmail 28590 invoked from network); 8 Nov 2002 18:38:59 -0000 Received: from mx.last.plus.net (212.159.3.230) by mailstore with SMTP; 8 Nov 2002 18:38:59 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 9396 invoked from network); 8 Nov 2002 16:22:19 -0000 X-Priority: 3 Received: from post.thorcom.com (193.82.116.70) by mx.last.plus.net with SMTP; 8 Nov 2002 16:22:19 -0000 X-MSMail-Priority: Normal X-SQ: A X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18ABzL-0004gb-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 08 Nov 2002 16:28:07 +0000 Received: from [212.125.75.12] (helo=mail4.messagelabs.com) by post.thorcom.com with smtp (Exim 4.10) id 18ABzK-0004gS-00 for rsgb_lf_group@blacksheep.org; Fri, 08 Nov 2002 16:28:06 +0000 X-VirusChecked: Checked X-Env-Sender: William.Ashlock@edwards.boc.com X-Msg-Ref: server-14.tower-4.messagelabs.com!1036772875!37592 Received: (qmail 16314 invoked from network); 8 Nov 2002 16:27:55 -0000 Received: from unknown (HELO ukfw1.ge.boc.com) (193.131.2.157) by server-14.tower-4.messagelabs.com with SMTP; 8 Nov 2002 16:27:55 -0000 Received: from z-160-100-160-136.est.ibm.com ([160.100.160.136]) by ukfw1.ge.boc.com; Fri, 08 Nov 2002 16:27:53 +0000 (GMT) Received: from exc_wil04.edwards.boc.com ([162.118.144.226]) by exc_cra03.edwards.boc.com with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2653.13) id TP3F3SK1; Fri, 8 Nov 2002 16:31:12 -0000 Received: by EXC_WIL04 with Internet Mail Service (5.5.2653.19) id ; Fri, 8 Nov 2002 11:27:45 -0500 Message-ID: From: "Ashlock,William" To: rsgb_lf_group@blacksheep.org Date: Fri, 8 Nov 2002 11:27:42 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Subject: RE: LF: To Ponder over the weekend Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Status: No, hits=0.7 required=5.0tests=EXCHANGE_SERVER,INVALID_MSGID,SPAM_PHRASE_02_03version=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Jim, I think there is a Lowfer-like solutin to this problem. Seems to me that if everything is assumed to be 'ideal' or 'loss-free' including the wires, there would still have to be a TX loop antenna formed by the connections. At the instant of connection there would be radiation of 25uJ at a frequency dependent on the capacitance and inductance of the components. (See, there is no problem anyone can introduce that has no oportunity for me to put in a plug for TX loop antennas! ) Have a good, mind relaxing, weekend! Bill A >This simple puzzle caused more discussion in my office this morning than it >had any right to.... Here is another conundrum along similar lines - you have two identical, loss-free 1uF capacitors, one is charged to 10V, the other is discharged. You then connect the two in parallel so the total C is now 2uF - charge will flow from the charged capacitor into the discharged capacitor. Assuming charge Q is conserved, and that Q=CV, the voltage must now be 5V. But the stored energy in a capacitor =1/2CV^2, so with the single charged capacitor, the stored energy is 1/2 x 1u x 100 = 50uJ, while with both capacitors in parallel it is only 1/2 x 2u x 25 = 25uJ. So where has the other 25uJ gone? Cheers, Jim Moritz 73 de M0BMU _____________________________________________________________________ This e-mail has been scanned for viruses by the WorldCom Internet Managed Scanning Service - powered by MessageLabs. For further information visit http://www.worldcom.com _____________________________________________________________________ This e-mail has been scanned for viruses by the WorldCom Internet Managed Scanning Service - powered by MessageLabs. For further information visit http://www.worldcom.com