Path: csiph.com!weretis.net!feeder6.news.weretis.net!news.misty.com!border2.nntp.dca1.giganews.com!nntp.giganews.com!buffer2.nntp.dca1.giganews.com!buffer1.nntp.dca1.giganews.com!nntp.earthlink.com!news.earthlink.com.POSTED!not-for-mail NNTP-Posting-Date: Sun, 06 Feb 2022 14:22:11 -0600 Message-ID: <62002E11.232E@ix.netcom.com> Date: Sun, 06 Feb 2022 12:22:41 -0800 From: The Starmaker Reply-To: starmaker@ix.netcom.com X-Mailer: Mozilla 3.04Gold (WinNT; U) MIME-Version: 1.0 Newsgroups: sci.physics.relativity,sci.math Subject: Re: Problem References: Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Antivirus: Avast (VPS 220206-8, 02/06/2022), Outbound message X-Antivirus-Status: Clean Lines: 51 X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 108.219.229.47 X-Trace: sv3-QyvpmaJ0lCIVeNCCA8lBAqCJZTz9V6DcS1fqmWJLELBn7YPCUYtXXDawrWPtCJa/f+HKw9eW6MtuPO8!8hEyO3wekOAowJ1Tk+vxPWHnv9D04GLyhca5Rc4QcTgJcxdzV1xk3YR7N9XL/whlGClyfDr/PA1J!XalpGYO/bhI= X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 X-Original-Bytes: 2539 Xref: csiph.com sci.physics.relativity:576129 sci.math:553225 Richard Hachel wrote: > > Problem of the day Baccalaureate Seine-Saint-Denis June 2022 (France): > > A tap leaks three drops of water every 24 hours, or one drop every eight > hours. > > First question: is this normal? > > Second question: Assuming that a day corresponds to approximately 24 > hours, estimate the loss per day. > (four points) > > Third question: assuming that the neighbor upstairs takes drugs, and that > his daughter is a prostitute, does this have an impact for you on the > leakage of the tap? > (one point). > > If not, explain why (fifteen points). > > We give the following Lorentz transformations: > x'=(x+vt)/sqrt(1-v²/c²) > y'=y > z'=z > t'=(t-xv/c²)/sqrt(1-v²/c²) > The accelerations of the tap water leak will be neglected. neglected??? but, but..the water drops fall under constant *accelerations* due to gravity. You sound like those teachers in skool who are in need of 'textbooks' in order to learn how to teach. Without 'textbooks', teachers cannot teach. (and these textbooks come with solutions otherwise the teachers themselves don't know the answers.) > > R.H. -- The Starmaker -- To question the unquestionable, ask the unaskable, to think the unthinkable, mention the unmentionable, say the unsayable, and challenge the unchallengeable.