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Programming Forum and web based access to our favorite programming groups.On 27 Sep, 04:05, Robert <n...@e.mail> wrote: > On Wed, 26 Sep 2007 11:58:36 -0700, Alistair <alist...@ld50macca.demon.co. uk> wrote: > > > > > > > It's almost impossible to avoid electricity. In the old days, electricity was considered > fire, closing or opening a switch was the same as starting or extinguishi ng a fire > (they're not allowed to extinguish fires either). In those days, electrici ty that didn't > throw visible sparks or get hot was ok. For example, incandescent bulbs we re out, but LEDs > were ok. > > After someone, probably a physicist, explained the fundamental difference between > electricity and fire, they changed the reason from fire to construction. C losing a switch > was building a circuit; opening a switch was deconstructing a circuit (the y're not allowed > to tear things down either). After the change, LEDs and semiconductor gate s were forbidden > switches. Computers, including embedded processors in security cameras and motion > detectors, are flipping switches millions of times per second. What about using a DIGITAL > hearing aid? What about the automatic door opener at the supermarket, the DIGITAL security > cameras taking your picture as you walk through the store, or the RFID sca nner that > electronically frisks you on the way out? What about crosswalks that sense pedestrians > with proximity switches? What about automated toilets and sinks, which als o use proximity > detectors?- Hide quoted text - > > - Show quoted text - As an atheist, I can only be amused. However, haven't they heard of Newtons and that all motion in a gravitational field constitutes work?
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