Re: dimensionless units & Mach Number

[Tim O'Donnell <odonnt@CELINA.K12.OH.US>]

> If you're asking my opinion (it seems like you are) my answer is that
> it depends on what you mean by "change".  If by not changing you will
> fail everyone who can't do it as fast as the boys used to then I say
> yes - you should change.  If you mean by changing that you will not
> require students to be able to string a pulley anymore then I say no -
> I think that being able to string a pulley system is a reasonable
> standard, just be aware that you'll have to provide more time for
> practice and instruction than you used to provide.

Absolutely correct, but where does that time come from; something
else suffers.  I think stringing pulleys is an important concept in
terms of machines, advantages, efficiencies, etc.(others may not),
but what goes away.  Until school years are lengthen ( and I'm not
exactly wanting that to happen) what should be the priority?  It is
the biggest decision I make each year - what should I "cover."


Tim O'Donnell
Instructor of Physics and Chemistry
Celina High School
715 East Wayne Street
Celina, Ohio 45822
(419) 586-8300 Ext 1200 or 1201
odonnt@celina.k12.oh.us

"Chance only favors the prepared mind." - Louis Pasteur