There are formulæ for deeply wound coils, and for coils of spaced turns of round wire or of flat tape ... The mechanical forces between inductors are also calculated.

Flat irons seem pretty straightforward since they require just a few passes with a steady hand to do their job, but certain things can set a good one above the rest: a range of heat settings to ...

They're essential for putting together a comfortable workwear outfit, and despite being "flat," are often secretly embedded with supportive features that make traveling by foot a little easier.