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Cake day: June 30th, 2023

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  • The concept of having interchangeable, standardized parts is actually kind of a new idea from the Industrial Revolution. Before then, everything was custom-made to fit. The example that comes to mind is firearms. All of the muskets and rifles used in the revolutionary war, for example, were hand-made and hand-fitted. The lock from one rifle wouldn’t necessarily fit on another. If your stock broke, you couldn’t just go get a new stock and slap it on - you had to bust out the woodworking tools and make a new one.








  • CommissarVulpin@lemmy.worldtoScience Memes@mander.xyzRadioactivity
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    4 months ago

    So there’s four types of radiation: alpha, beta, gamma, and neutron. When you’re talking about radioactive materials, it’s almost exclusively the first three. In addition to the inherent danger of the object itself, there’s also the danger of radioactive contamination: not making other things radioactive, but shedding bits of themselves as dust and then that dust getting on other things, or getting ingested/inhaled by humans.

    Active fission reactions, like what goes on in the core of a nuclear reactor (or perhaps messing around with some plutonium and a screwdriver), produce neutron radiation. Neutrons can make other things radioactive, via a process called “neutron activation”, whereby the neutrons bind to the material and change some of the atoms into radioactive isotopes.

    I hope that helps, and feel free to ask me anything else about radiation. I have some education about it thanks to my job, and I’m always happy to help other people understand it more as well.