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  2. Mach wave - Wikipedia

    en.wikipedia.org/wiki/Mach_wave

    Schlieren photograph of an attached shock on a sharp-nosed supersonic body. The Mach angle is acute, showing that the body exceeds Mach 1. The angle of the Mach wave (~59 degrees) indicates a velocity of about Mach 1.17.

  3. History of the graphical user interface - Wikipedia

    en.wikipedia.org/wiki/History_of_the_graphical...

    These object-oriented graphic engines driven by user interface classes and methods were then standardized into the Amiga environment and changed Amiga Workbench to a complete and modern guided interface, with new standard gadgets, animated buttons, true 24-bit-color icons, increased use of wallpapers for screens and windows, alpha channel ...

  4. Sustainable Development Goals - Wikipedia

    en.wikipedia.org/wiki/Sustainable_Development_Goals

    The SDGs include three environment-focused SDGs, which are Goal 13, 14 and 15 (climate, land and oceans), but there is no overarching environmental or planetary goal. [166]: 144 The SDGs do not pursue planetary integrity as such. [166]: 144 Other SDGs, which as Goal 7, 12 and 13 ignore the planetary limits and encourage consumption [170]