Umm, perhaps I'm mistaken, but I'm fairly certain that, at least in the US, it's always been fairly easy to obtain N95 masks, up until the pandemic. I realized I had a box of them lying around which my ex-girlfriend had purchased for painting.
Yeah, so did I. I use them for sanding and sweeping.
But early in 2020, they disappeared off the shelves. Amazon, in particular, only sold them to medical professionals. Same thing, if you went directly to 3M.
I was able to buy a few more at about ten times the usual price.
A few are available at reasonable prices now, but it's still very limited. When I wear a mask, it's an N95. You can dry them out and reuse them - SARS2 is very fragile.
Anecdotally, for me I didn't watch it religiously, but I would watch anytime there was a guest that I liked or found interesting. I haven't watched a single show since he moved to Spotify.
The human driver detects the pedestrian, laughs at the fall, then get worried and wait for them to get up, because a human knows someone fell and didn’t magically disappear.
Also, a 10 year old child will likely not fear bodily harm or death the same way a 40-year old adult would, of course that can be an advantage or disadvantage depending on the situation.
Wow, I can't believe I went this long without realizing there were these characters specifically intended to be used in text based interfaces. It's funny, these are almost like the opposite of emojis, text trying to be graphics, rather than graphics trying to be text.
This doesn't make much sense to me. The speed of light is a constant, right? Gravitational interactions may change the directional component, but the speed would remain constant, no?
It was expressed clumsily. The idea would be that photons can lose energy over time or space. One problem is that they would all have to lose energy at exactly the same rate as neighboring photons, so be a property of the space they are going through, not the photons themselves.
The speed would remain constant; 'tired light' would shift to longer wavelengths (redden).
Fritz Zwicky proposed the idea in 1929 - didn't work out. In 1933 he 'inferred the existence' of dark matter/energy, after using the averaged speed of a group of galaxies to calculate their mass ... and found they were producing too little light to have that mass. And there it sits a century later. MON Dieu!
C is constant, which is the "speed of light in a vacuum." Light can, and does, travel slower than C, e.g. when traveling through gas or other material.
No. Gravitational waves are causing fluctuations of speed of light in pure vacuum. (See LIGO/VIRGO experiments). So c is constant in steady physical vacuum only, i.e. it's speed of EM wave in medium. If you will change properties of medium, then c will be changed too.
Not exactly throwaway per say, but I have a Google Voice VOIP number that I usually use when I'm signing up for services that require a phone number. Some services seem to be able to actually detect that it is a Google Voice number and will reject it, but it works the majority of the time, and I believe it has helped in keeping my main phone number from receiving as much spam. One plus about using Google Voice is that I can access it later if I need to use it to regain control of an account if I lose a password or whatever. That number predictably gets a fair amount of spam now, but another nice thing about Google Voice is that I can quickly use full text search on the entire call history, voicemail, and sent/received SMS messages.
