[log in to unmask][log in to unmask], 24 Apr 2003 15:16:45 -0500442_- Overload protection is provided by circuit breakers and fuses. Utilities do not provide nor rent this protection. Surge / spike / transient protection is different. Some electric utilities rent a 'whole house' surge protector for maybe $5 per month. It shunts or earths transients that exceed 300 volts on the 120 VAC line. 300 volt transients are below what any 120 VAC appliance should withstand without damage. [...]40_24Apr200315:16:[log in to unmask]
Brice writes:
> I need a proof of this
>
> "e^(i*pi) = -1" -- Euler
Two different methods of proving Euler's Equation to be true appear at:
http://perch.cimr.cam.ac.uk/Course/Adv_diff1/Euler.html
Euler's Equation states that:
e^(i * alpha) = cos(alpha) + i * sin(alpha)
If you let alpha = pi, then the righthand side becomes:
e^(i * pi) = -1 + i * 0
Wirt Atmar
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