Comments by "LoneTech" (@0LoneTech) on "SmarterEveryDay" channel.

  1. Reminds me of a report I saw somewhere about electron microscopes that didn't work at a fairly high altitude. The manufacturer had not tested under low pressure conditions.
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  2. It can be used the other way around too; pressure cookers can go to higher temperatures, and cook food faster.
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  3. There's no distinct row for CH4, perhaps because humans can detect the smell before it reaches dangerous levels. The other main gaseous components are monitored. CH4 might be counted in the ALIPHAT heading, and SO2 in the AROMAT heading.
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  4. A Unicorn the dissection process is rather gory, certainly, but you might appreciate why they do it. That particular episode had a touch of detective work, as I recall.
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  5. Really wanted that shirt, but apparently it only ships to seven countries (obviously excluding most). What's with that?
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  6. Unusually, it's medium format positive film, not negative.
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  7. I find XKCD 925 apropos. And CGPGrey's "this video will make you angry" is a nice primer on what forces act on these messages.
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  8. This is the sort of video I wish was stereoscopic. Great work :)
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  9.  @Sir_Uncle_Ned  Anything is liquid at sufficient force. For instance, planets are dust droplets.
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  10. Discussing why a reading didn't match expectations is not bad at all. This is the start of many good scientific inquiries; discoveries that make you go "huh". They were discussing variables they had not controlled for. I'd guess the big one is that they're looking at samples days apart, with weather affecting pressure to a similar degree. If they recorded air pressure and temperature as well as altitude, this hypothesis could be tested with existing data. An example of bad science would be assuming a measurement was in error and discarding it instead of highlighting it.
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  11. Most of the bacteria we'd worry about can't handle 65 degrees C (the big one is legionella, which is why hot water should not drop below 50 degrees). Also, boiling itself kills them as they contain water. It's recommended to boil longer at lower pressures, as it's gradual anyway.
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  12. Now that is a cocoon just begging for a light field photograph! Thank you :)
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  13. The next recommendation in my list is an episode from Dylan Beattie's series "the history of software in three letter acronyms", "B is for BBC". I think that's a good choice.
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  14. Is the purpose of the painful font to mane people look away from the slides or have to struggle to read them?
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  15. The fuel drop is essentially smashed by the air pushing it into the engine, because the engine side suddenly loses pressure. Fascinating.
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  16. They did. It's the part left of the hyphen.
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  17. ​ @illidur  The force from each booster must transfer through the attachment points to reach the center line. By aiming it that way in the first place, it doesn't try to tear the bottom attachment apart (as much).
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  18. A normal cylinder (reel) mower does use shearing, with a fixed bottom blade and helical rotating top blades. Your motorized rotary mower operates more like a scythe.
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  19. May I recommend AlphaPhoenix's video "Boil Water at Room Temperature with 50 ft. of Hose and a Stairwell"? There's bound to be a few other good ones on the subject as well.
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  20. Very cool. A biological Phase Locked Loop.
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  21. It could be for relating to flight levels, which are given in hectofeet.
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  22.  @ka9dgx  They have been around a while. My first real digital camera was a little later, the Epson PhotoPC 700 (1998 per digital camera museum). You sure could light paint with its super long exposures.
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  23. AlphaPhoenix has a nice video where he demonstrated boiling water by pulling it up a straw (long vertical hose). It's titled "Boil Water at Room Temperature with 50 ft. of Hose and a Stairwell." He discusses the physics of it at some length.
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