This enables the accurate construction of a regular pentagon, and here is one way to do it. The difference between Justly Intoned and Equally Tempered musical scales is explored in Tuning for Sound, where there is also a new and not very mathematical section on ocarinas. It is possible to express the general electromagnetic equations as a vector cross product. It has been a long time since I wrestled with Fleming s Left Hand Rule, so I cannot say for sure which of these equations is actually correct. If anyone could enlighten me with an elegant explanation, I can put your link here.
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