My name is Dan Jones. I have been using Wikipedia for several years. At one time, I contributed quite regularly, but I don't find as much time to do so now as I previously did.
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An oblique shock is a shock wave that, unlike a normal shock, is inclined with respect to the direction of incoming air. It occurs when a supersonic flow encounters a corner that effectively turns the flow into itself and compresses. This photograph shows an oblique shock at the nose of a Northrop T-38 Talon aircraft, made visible through Schlieren photography.Photograph credit: NASA & US Air Force (J.T. Heineck, Ed Schairer, Maj. Jonathan Orso, Maj. Jeremy Vanderhal)
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Ending a sentence with a preposition is something that this user is okay with.
’s
Thi's user know's that not every word that end's with s need's an apostrophe and will remove misused apostrophe's from Wikipedia with extreme prejudice.
Subj
This user prefers that the subjunctive mood be used. Were this user you, he would use it.