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Cake day: June 16th, 2023

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  • Fun uranium facts: during WWII, one method that the Manhattan Project used to refine uranium (i.e. separate U235 from natural uranium which is mostly non-fissile U238) relied on magnetism. A charged particle moving through a magnetic field experiences a force perpendicular to the direction of motion, which makes it follow a slightly curved path instead of a straight line. This force is the same for both U235 and U238 but since U235 weighs slightly less, its path is slightly more curved. By charging particles of natural uranium and shooting them through a powerful magnetic field, separate collectors can be set up to gather the U235 particles.

    Creating the magnetic field required powerful electromagnets. Normally these would have used copper wire but copper was a valuable strategic metal needed for much of the other military hardware the US was producing, so the Manhattan Project “checked out” the United States’ reserves of silver to build the magnets. For good measure, the electricity for the magnets came mostly from the hydroelectric dams built as part of the Tennessee Valley Authority projects of the 1930s (this is mainly why the Manhattan Project’s uranium processing facilities were located in Oak Ridge). These dams were originally meant to power the production of aluminum, but the US had plenty of other sources for that.







  • ChickenLadyLovesLife@lemmy.worldtoMicroblog Memes@lemmy.worldJD Vance
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    5 days ago

    I was a teen in the ‘80s and I never heard the origin of “Joy Division”, just knew the band. DJs on the radio (or on MTV) back then never discussed bands’ names or what they meant, so it wasn’t easy to know about that stuff. I also never knew what “Dead Kennedys” meant although that’s pretty obvious if you just think about it. Hell, I never knew Freddie Mercury was gay despite the band name “Queen”.

    I also thought Boy George was a woman, but everybody did.



  • I used to work for a software development company in Louisiana. At company meetings the CEO would always close with a prayer to Jesus, which was certainly the only time in my programming career I had to deal with that. Maybe 80% of the company were Christians but the rest of us were Jews, Muslims, Hindus and atheists (just me) and it was always weird to be looking around at each other while everybody else had their heads bowed. Unfortunately, this company was pretty much the only game in town for programmers so nobody was willing to call the CEO out for this shit.