the.com/alternating
the rhythm of reality refusing to commit, flipping its mind sixty times a second
power gridAC reverses direction 50 or 60 times per second
war of currentsTesla's AC crushed Edison's DC over distance
biologyplant leaves alternate to dodge each other's shadow
mathalternating series can converge by simply flip-flopping signs
why ac winsvoltage steps up easily, so wires waste less