home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.hp48
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!doug.cae.wisc.edu!kolstad
- From: kolstad@cae.wisc.edu (Joel Kolstad)
- Subject: Re: Exam mode in version J (var lock?)
- Organization: U of Wisconsin-Madison College of Engineering
- Date: 22 Jan 93 22:45:29 CST
- Message-ID: <1993Jan22.224530.8625@doug.cae.wisc.edu>
- References: <1993Jan19.193729.6825@netcom.com> <1993Jan19.164320.14325@doug.cae.wisc.edu> <1993Jan23.030545.24088@netcom.com>
- Lines: 43
-
- In article <1993Jan23.030545.24088@netcom.com> payner@netcom.com (Rich Payne) writes:
- >
- >Lets say that current is a result of the applied voltage, lightening in
- >this case. Very high voltage = very high current.
-
- Only if the voltage supplys's impedence is low. Those 10KV shocks you get
- from doorknobs won't ever kill you -- honest.
-
- >Do you expect lightening to be of such high frequency that the skin
- >effect need be considered? What exactly are we talking about?
-
- No, I'm just refuting your assertion that high voltages are _always_
- dangerous. For the lay person, they might as well be, but I hope we're
- all a little bit more educated than that around here. :-)
-
- I certainly agree that lightning is always dangerous.
-
- >[static electricity] Heres a case where we have high
- >voltage, electrons scattered mostly about the skin, and 0 HZ. The charge
- >is static. Curiously, this is related to lightening, but not to DC and AC
- >voltage sources.
-
- The charge is only static _before_ it zaps you. _As_ it zaps you, charge
- is certainly moving.
-
- >Said microwaves being indistinguishable from the ones used by radar sets.
- >You have made a distinction where there is no difference.
-
- I believe that there are significant physiological differences between
- being exposed to different frequencies of microwaves, where one comes from a
- radar dish, and the one comes from a microwave oven. (At the same power
- level.)
-
- It's not a good idea to stand in front of either. :-) (Assuming they're
- not shieled, of course.)
-
- >Really, then why do fats heat so much faster [than water]?
-
- Is fat high in water content? I don't know. It's not my area of expertise.
-
- If you want to discuss this very strained topic some more, let's take it to
- e-mail. Thanks.
- ---Joel Kolstad
-