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*To*: "'quattro@coimbra.ans.net'" <quattro@coimbra.ans.net>*Subject*: Re: license plates...clever and inoffensive*From*: Dan Hall <Daniel.R.Hall@digital.com>*Date*: Fri, 16 Oct 1998 17:05:52 -0400*Sender*: owner-quattro@coimbra.ans.net

In quattro-digest V4 #2923, Huw Powell wrote: >> acceleration is the rate of change of speed of time, hence dx/dt**2. >> take out the non-dmv characters and you have dxdt2. >I still think it is d^2x/dt^2. but I'll dig out the old Weeks and >Adkins and refresh myself... I just remember that there was a >superscript 2 above and below, but that one was on the d... and I most >certainly could be guilty of being blinded by the fog of time! You're correct, Huw. I'm currently taking a course in Control Systems, and have recently finished courses in Advanced Circuits, Diff Eq, and way too much calculus. The second derivative of x wrt time is, in fact, d^2x/dt^2. If x represents position, the first derivative is velocity, and the second derivative is acceleration. ObAudi: I've been putting lots and lots of audio in my 90q recently. The 90 has a tiny trunk, but I've found places for five power amps, and an 8" woofer where the ski sack used to be. This weekend's project: a 1.5 farad capacitor across the amp power leads! -Dan daniel.r.hall@digital.com

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