Over a year since last R15 / Tube meet up
Posted: 26 Jan 2021, 15:15
Wow time flies eh, sadly it's now over a year since our little Tube family all gathered together back on 11th January 2020 for R15 round 3
Eleven lines - one record
http://www.tubechallenge.com/forum/
Yep, how time flies. There was some suggestion face coverings may be made permanent on the tube, which would surely mean the end of tube challenge altogether?Going Underground wrote: ↑26 Jan 2021, 15:15 Wow time flies eh, sadly it's now over a year since our little Tube family all gathered together back on 11th January 2020 for R15 round 3
As someone who struggles wearing a mask for prolonged periods of time (but not enough to be exempt!), I think it would likely be the end of Tube Challenging for me, especially if they were also required on the trains to/from London.
Fact check: A molecule of COVID-19 is quoted to be approximately 100 nanometers large. A human hair is 70 000 nanometers large. 70 000/ 100 = 700 so your approximation of the virus being 1/1000th the size of a human hair is reasonably accurate.Going Underground wrote: ↑27 Jan 2021, 12:15 (a droplet of the alleged virus is 1000th the size of a human hair so that's not going to escape through the fabric then)
I'm curious as to how you've come to the conclusion that a face covering can't stop a virus (100 nanometers) but can stop you from having a good supply of air (oxygen is 0.3 nanometers, nitrogen is also about 0.3 nanometers, carbon dioxide is 0.33 nanometers). Either you have to go all in on face coverings being good for nothing, cant even block a virus that's 100nm large, or go all in on face coverings making it hard for you to breath because they block too much air.Going Underground wrote: ↑27 Jan 2021, 12:15 I still run twice a week I find myself out of breath after briskly walking one flight of stairs....
I need to get a like button installed on this forum.lucybaell wrote: ↑27 Jan 2021, 15:09Fact check: A molecule of COVID-19 is quoted to be approximately 100 nanometers large. A human hair is 70 000 nanometers large. 70 000/ 100 = 700 so your approximation of the virus being 1/1000th the size of a human hair is reasonably accurate.Going Underground wrote: ↑27 Jan 2021, 12:15 (a droplet of the alleged virus is 1000th the size of a human hair so that's not going to escape through the fabric then)
However, in your infinite wisdom as an armchair epidemiologist, you've failed to remember that viruses (outside of lab conditions) are always bonded to something larger. The larger droplets that you breath out when you're talking (or in your case, spewing misinformation) can be over 1000 nanometers large, especially if the droplets are visible. All medical grade or cloth face coverings have a pore size of 100 - 300 nanometers meaning these 1000nm+ droplets are stopped in their tracks, and that's even before we get into electrostatic filtration whereby the even smaller droplets are held in suspension by the static between the fibers of the material.
I'm curious as to how you've come to the conclusion that a face covering can't stop a virus (100 nanometers) but can stop you from having a good supply of air (oxygen is 0.3 nanometers, nitrogen is also about 0.3 nanometers, carbon dioxide is 0.33 nanometers). Either you have to go all in on face coverings being good for nothing, cant even block a virus that's 100nm large, or go all in on face coverings making it hard for you to breath because they block too much air.Going Underground wrote: ↑27 Jan 2021, 12:15 I still run twice a week I find myself out of breath after briskly walking one flight of stairs....
You can't have both facts be true, and if you want to say face coverings block nothing then you'll have to chalk your shortness of breath up to something else.
But hey... you know what shortness of breath is a common symptom of...
+1tubeguru wrote: ↑27 Jan 2021, 18:19I need to get a like button installed on this forum.lucybaell wrote: ↑27 Jan 2021, 15:09Fact check: A molecule of COVID-19 is quoted to be approximately 100 nanometers large. A human hair is 70 000 nanometers large. 70 000/ 100 = 700 so your approximation of the virus being 1/1000th the size of a human hair is reasonably accurate.Going Underground wrote: ↑27 Jan 2021, 12:15 (a droplet of the alleged virus is 1000th the size of a human hair so that's not going to escape through the fabric then)
However, in your infinite wisdom as an armchair epidemiologist, you've failed to remember that viruses (outside of lab conditions) are always bonded to something larger. The larger droplets that you breath out when you're talking (or in your case, spewing misinformation) can be over 1000 nanometers large, especially if the droplets are visible. All medical grade or cloth face coverings have a pore size of 100 - 300 nanometers meaning these 1000nm+ droplets are stopped in their tracks, and that's even before we get into electrostatic filtration whereby the even smaller droplets are held in suspension by the static between the fibers of the material.
I'm curious as to how you've come to the conclusion that a face covering can't stop a virus (100 nanometers) but can stop you from having a good supply of air (oxygen is 0.3 nanometers, nitrogen is also about 0.3 nanometers, carbon dioxide is 0.33 nanometers). Either you have to go all in on face coverings being good for nothing, cant even block a virus that's 100nm large, or go all in on face coverings making it hard for you to breath because they block too much air.Going Underground wrote: ↑27 Jan 2021, 12:15 I still run twice a week I find myself out of breath after briskly walking one flight of stairs....
You can't have both facts be true, and if you want to say face coverings block nothing then you'll have to chalk your shortness of breath up to something else.
But hey... you know what shortness of breath is a common symptom of...