Re: AC electricity

[Bob Sciamanda <trebor@VELOCITY.NET>]

How about an AC force which alternately pushes a mass back and forth -
like using sandpaper!

Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor

----- Original Message -----
From: "Tim O'Donnell" <odonnt@CELINA.K12.OH.US>
To: <PHYS-L@lists.nau.edu>
Sent: Wednesday, January 17, 2001 01:20 PM
Subject: AC electricity


> I know that AC delivers energy - that is obvious.
> But I still have trouble understanding how this is possible
> since half the time the potential is positve and the other
> have it is negative.  It seems they should cancel out.
> I know and can do the rms (root mean squared - although
> shouldn't it be squared mean root) for figuring out various
> quantities, but I still don't think I have a basic
> understanding on "how" it really works.