People wearing dust masks in smoggy cities as if molecules will be stopped by basically a paper towel. This is very popular in Asia. Apparently they don't teach chemistry with all that math they take.
Similarly people sitting in Doctors office putting their shirt over their orifices as protection against other sick people in waiting room with them.
Your ignorance of the first explains the second. They may be "dust" masks but they are being worn for preventing infections. If it covers your infection vectors (mouth and nose), you are less likely to touch them with your hands or have other direct contamination from the environment, though it does nothing for your eyes. Contrary to popular belief, influenza doesn't just spread in the air. It speads primarily through saliva droplets on surfaces or directly projected through the air (sneezing), both of which a mask will help with. We are talking about small droplets which can be stopped by a mask and not "molecules" that you imply will go right through.
Now, if you are in a room with a bunch of sick people, there is a much higher chance of suspended droplets entering infection vectors or even being directly sneezed on, so a shirt over the nose and mouth certainly can help. Think about what makes the "flu season" the "flu season." Even in regions that don't get very cold, it gets cooler, often uncomfortably cool, and people spend more time together indoors. The spike in transmissions affects the warmer regions almost as much due to travel. There is an additional factor in that cold air causes noses to run which causes people to wipe them and get infected. It can also assist in spreading the infection even before the symptoms cause a runny nose.
BOTH actions you criticize are perfectly justifiable. Now, also consider that DUST masks block DUST and the cities are dirty and DUSTY. They aren't trying to block individual molecules either way.
On the fanning you guys don't get it and let all the physics get in the way. It's simply psychological, pure and simple. If you feel it makes you cooler then go right ahead and knock yourself out! :biggrin: Why do you think the important people had their own person whose job was to fan them with a palm spread? Oh the days before air conditioning in the tropics.
And on lightbulbs I will tell you that just as many - if not more - good ones rattle than bad ones.
Oh and for sickness what happens when some sicko decides it would be funny to put anthrax in netflix sleeves?
You are categorically wrong about the physics of fanning one's self. It is mostly because you fail to consider the energy/heat output of an at-rest warm-blooded body is still significant and that no energy was used to cool the air (already cooler). The same energy used to make that body heat can, instead, be applied to movement. It's metabolism either way. A dog does not pant for psychological reasons. Your theory would apply to dogs just the same and yet you dismiss it just because we are fanning and not panting. Think about it a little harder. Dogs are expending enrgy to move additional air to evaporate water just the same as we are. The evaporative effect must be internal for no other reason than that dogs do not have sweat glands. Canines do not have sweat glands because their coats would be overrun with fungus in the wild if they did. The biological shift indicates that BOTH are valid.
You can tell if the filament is loose and sliding around vs. just knocking the side. You can tell this BY shaking it. A broken filament will often make a noise as you spin the bulb because it will slide around.
turning down the volume to look at addresses on curbs
Are you familiar with the concept of eliminating distractions when concentrating on something else?
Continuously flick a light switch on and off when the power is out.
It's not going to make it come back faster, and there's no more juice left in the wire and you can't pump it out by doing that.
So, if the switch was just bad, you'd ignorantly keep calling your power company and complaining until the end of time? If the switch is going bad, a couple flicks might get it to work because it's unlikely that it went bad all at once. It's unlikely that it went bad for the first time around the time that there was a power outage, but it is part of the troubleshooting process.
°ø
Try coming down to the tropics and fanning yourself and you will see.
I base my observations upon experience here.
Years ago when I was in school they said the same thing.
It's kind of hard to prove it with discrete science since there are too many variables involved. Present this to Congress, you might be awarded a few million dollars for a study. Take some of that money and buy a boat. That's the American way.
You CANNOT say that fanning does not work just because it doesn't work in 114 degree 100% humidity. We acknowledged that it does not always work based on the theory alone but it DOES work in many situations. It does not work in 100% humidity because it requires the evaporation of perspiration to work, not because it creates more heat than it removes. It is not an "open refigerator in the middle of the room" argument. It is open-ended and there are many factors which almost always result in a net cooling effect as long as the temperature is under 98.6 degrees and humidity is under 100%.
Also dogs cannot perspire so they pant.
Which is precisely the reason why it's even MORE relevant to your physics claim that any energy spent to move air generates more heat than it could remove, so youre refusal to accept it and attempts to dismiss it continue to baffle me and others. You seem to think that panting works differently when it does not. It simply evaporates water and removes heat from a body region with an immune system versus evaporating water and removing heat from a body region directly exposed to the air because perspiring into an insulated fur coat and promoting fungal growth would not have the same effect.
Anyway, you are one of the most intelligent people on this forum but this thread is still full of fail.
people who correct others speech or typing. again it really serves no real purpose and rarely changes how someone types/talks. typically it just serves to annoy them.
Oh, it serves a purpose. People who refuse to change just the be stubborn and then complain about not seeing the reason "make no sense." BACKFIRE!
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