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Cake day: June 10th, 2023

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  • There’s plenty of infectious agents that can just lay dormant almost indefinitely.

    There’s major concern about viruses coming from the melting permafrost in regions like Siberia.

    If you want to hear something even more terrifying, prions can last about indefinitely. Chronic wasting disease in deer is particularly bad because a deer might die and its remains will decompose into the earth. But vegetation will later grow, and some of those prions will have contaminated the new vegetation. A new deer will get infected by eating that vegetation, even years later.





  • If a cup has a few drops of water after you pour it out,

    Say a drop is 0.05ml (20drop/mL is rule of thumb for chemistry). Say your glass cup holds 16oz (mine does), that’s 473mL.

    (4*0.05mL / 473mL) *100 = 0.04228% of the original concentration. Now scale that volume up. That ratio is going to be much smaller, since you’re right about volume vs surface area.

    5ppb is the cutoff for benzene in stunning water in Oregon apparently. EPA says 5ug/L.

    5ppb is apparently 0.0000005%. That’s about 84,000x higher than the cutoff for that one potential contaminant.

    Given how small the minimum acceptable level is for many chemicals in gasoline or fuel… Yeah I bet it would increase cancer rates in a statistically significant way.









  • piecat@lemmy.worldtoLemmy Shitpost@lemmy.worldWhoops
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    6 months ago

    Say you were a spy, and you think there’s a laser guarding the largest diamond in the world.

    There’s no way to detect if the laser is there without putting some form of matter in the way of the laser. Be it a hand, or spray bottle.

    Now at the museum, a mist won’t set off the alarm, but you’re still reflecting some of the photons out of the beam and into your eyes. Otherwise you wouldn’t see the beam…

    But for a quantum experiment, where we care about each individual photon, spraying a fine mist will affect the experiment. Sticking anything in that laser beam path will affect the measurement.

    So how do you make a measurement without interacting? As far as we know, you can’t.