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Cake day: September 30th, 2023

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  • Xerodin@lemm.eetoScience Memes@mander.xyzFuck geometry
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    20 days ago

    When talking about AC power, some of the power consumed doesn’t actually produce real work. It gets used in the generation of magnetic fields and charges in inductors and capacitors.

    The power being used in an AC system can be simplified by using a right triangle. The x axis is the real power being used by resistive parts of the circuit (in kilowatts, KW). The y axis is reactive power, that is power being used to maintain magnetic fields and charges (in kilovolt-amperes reactive, KVAR). And the hypotenuse is the total power used by the circuit, or KVA (kilovolt-amperes).

    Literal side note: they’re all the same units, but the different sides of the triangle are named differently to differentiate in writing or conversation which side of the power triangle is being talked about. Also, AC generator ratings are given in KVA, so you need to know the total impedance of your loads you want to power and do a bit of trig to see if your generator can support your loads.

    The reactive component of AC power is denoted by complex numbers when converting from polar coordinates to Cartesian.

    Anyways, I almost deleted this because I figured your comment was a joke, but complex numbers and right triangles have real world applications. But power triangles are really just simplifications of circles. By that I mean phasors rotating in a complex plane, because AC power is a sine wave.




  • In political party terms, a liberal is someone who supports the economic system of capitalism but wants to give concessions to the general population (free healthcare, cheap public transportation, etc) to placate the people from changing the system. The idea is if people are making a somewhat decent living then they will be less disgusted with the ludicrous amount of money the actual wealthy make and won’t revolt. Messaging from conservative parties has purposely conflated liberals with leftist (socialism/communism) ideology in order to tie it to the Red Scare and convince lower income people that the idea is meant to take more from working class people.