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The Mach number (M or Ma), often only Mach, (/ m ɑː k /; German:) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound.
Tyler Hoechlin as Kal-El / Clark Kent / Superman: a superhero from Krypton and husband of Lois who defends Earth. [2] Dylan Kingwell portrays a teenage Clark in season one, Josh Zaharia portrays a teenage Clark in season two, Lennix James portrays a four-year-old Clark, Thomas Hoeving portrays Clark in his childhood, and Parker Cousineau portrays Clark in grade school.