Languages I can speak: Hungarian, Lisp, Broken Engrish

  • 0 Posts
  • 199 Comments
Joined 2 years ago
cake
Cake day: June 9th, 2023

help-circle



  • idegenszavak@sh.itjust.workstoScience Memes@mander.xyzFucking math...
    link
    fedilink
    English
    arrow-up
    24
    arrow-down
    1
    ·
    edit-2
    12 days ago

    Yes, in elevators usually one cable could hold far more than the full weight, then they add 5 more for the safety.

    For rail speed limits this is the exact way they calculate it. For road speed limits they consider braking distance, which grows by the square of your speed, so if you go 120 on 60 road, you will need 4 times the distance to stop. I wrote 1.5 as a safety factor, not 4, With a 1.5 safety factor you can go by 75 though, but I would use a 1.1 safety there, as in my country the speed cameras are set up that way, you can go +10% of the official speed limit, they only send a cheque if you went even quicker than that.


  • It’s not wrong, it’s close enough. And the point it works with more numbers and more type of calculation. Let’s calculate 4% of 1243. That’s the same as 1243% of 4, right, much easier to calculate by simply changing the 2 numbers… While my method is the same, by simply rounding everything.

    And in engineering you always multiply/divide your results by a 1.5 or 1.25 safety factor, depending on situation. So you don’t have to calculate exact results, just close enough. E.g. G is always 10m/s2. π is only 3.14, the other digits doesn’t matter.















  • It seems you haven’t heard about “the Thing”:

    The Thing, also known as the Great Seal bug, was one of the first covert listening devices (or “bugs”) to use passive techniques to transmit an audio signal. It was concealed inside a gift given by the Soviet Union to W. Averell Harriman, the United States Ambassador to the Soviet Union, on August 4, 1945. Because it was passive, needing electromagnetic energy from an outside source to become energized and active, it is considered a predecessor of radio-frequency identification (RFID) technology

    So 80 years ago they had the technology to listen to you without electricity, it could be anywhere, even in the framing. I would just remove some sample from the frames, or maybe drill holes in it randomly to find my thing