Le velocità di volo sono suddivise in quattro categorie: subsonico, transonico, supersonico e ipersonico. In aeronautica l’unita’ di misura della velocita’ macroscopica e’ il Mach. Il Mach La definizione è data considerando il numero di Mach ottenuto calcolando il rapporto tra velocità del velivolo e velocità del suono per l’aria una volta che sia fissata...
Rinviati a data da destinarsi i dazi sulle auto elettriche cinesi (e anche su altre merci di importazione) annunciati dagli Stati Uniti. Serve tempo, ma intanto il Canada procede e anche l’Europa. E la Cina agisce di conseguenza Gli Stati Uniti frenano l’ondata di pesanti dazi rialzati sino al 100% sulle auto elettriche cinesi, e...
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