Path: news.ccsf.jp!tomockey.ddo.jp!border1.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!cyclone1.gnilink.net!spamkiller.gnilink.net!gnilink.net!nwrddc02.gnilink.net.POSTED!24dd0da6!not-for-mail Sender: Jim Pennino Message-ID: From: jimp@specsol.spam.sux.com Subject: Re: Mach Projectile Newsgroups: alt.math,alt.math.recreational,japan.sci.math,sci.math,sci.physics References: User-Agent: tin/1.8.3-20070201 ("Scotasay") (UNIX) (SunOS/5.10 (i86pc)) Lines: 17 Date: Thu, 25 Dec 2008 06:15:02 GMT NNTP-Posting-Host: 71.118.11.57 X-Complaints-To: abuse@verizon.net X-Trace: nwrddc02.gnilink.net 1230185702 71.118.11.57 (Thu, 25 Dec 2008 01:15:02 EST) NNTP-Posting-Date: Thu, 25 Dec 2008 01:15:02 EST Xref: news.ccsf.jp japan.sci.math:155 X-Original-Bytes: 1353 In sci.physics Jon wrote: > This introduces some of the math involved in predicting where a bullet will > hit before it gets there. Three microphones on a helicopter pick up the > conical shock wave. > > http://mypeoplepc.com/members/jon8338/math/id21.html Gun ballistics were solved about a century ago. The only thing new is what took days and a room full of people and calculators/math tables now takes seconds. -- Jim Pennino Remove .spam.sux to reply.