title: "Perioodend\u00fc\u00fcr"
text: "Det perioodend\u00fc\u00fcr of kurt periood as en miat uun a f\u00fcsiik. Hat sait \u00fctj, uun h\u00fcn tidj en f\u00f6\u00f6rgang, di ham st\u00fcdag wederhaalet, ufl\u00e4\u00e4pt. Det periodend\u00fc\u00fcr as di kiarw\u00e4\u00e4rs faan't frekwens.\n\nBestemang \nWan en w\u00e4\u00e4rs  efter en was tidj  leewen weder di salew as, do as  det perioodend\u00fc\u00fcr, an di w\u00e4\u00e4rs k\u00f6nst d\u00fc beskriiw \u00fcs:\n \u00a0 \u00a0 f\u00f6r irgent\u00e4\u00e4n tidjponkt t an en konstanten tidjr\u00fcm T.\n\nDi kiarw\u00e4\u00e4rs 1/T het frekwens (Formeltiaken: f of \u03bd (ny)).\n\nBispal \nDi wakselstruum uun Euroopa h\u00e4\u00e4 en frekwens faan 50 Hz. Diarm\u00e4 as det perioodend\u00fc\u00fcr:\n\nF\u00fcsiik"