Thank you, thank you, thank you Professor. Your chemistry course is wonderful. The best I've ever watched or read. Even the Intro video was very instructive, and what you said about learning chemistry should be said as an introduction to every science course ... because it is the very definition of science: "unless you fundamently understand molecules, all you can do is repeat things you've heard ... but how do you know if what you've heard is right ?". I fell in love with this quote and couldn't help but say it to all the people I know whose reasoning is medieval and not scientific (and there are many of them). I live in Algeria by the way.
Regarding HEPA Filters I would say this. There are many myths and legends about air purifiers. Scientific research is not always consistent with the practice. To understand if air purifier with a HEPA filter can help fight against coronavirus, we must first understand how it works, and above all, its effectiveness. If the manufacturer informs that the HEPA filter of a given class (e.g. Commonly used E12 or H13) removes 99.5 or 99.95 the percentage of particles with a diameter of 0.3 µm, this means that 0.3 µm are the most difficult to remove particles for this filter. On the other hand, for both larger and smaller particles - due to their specificity it results in greater coping results. It is wrong to claim that all particles below 0.3 µm somehow "squeeze" through the filter (such erroneous opinions can be found on the internet). Quite the opposite - HEPA filters perfectly capture particles as small as 0.01 µm, due to the phenomenon of molecular diffusion. This works more effectively on particles smaller than 0.2 µm. On the other hand, inertia mechanisms give maximum confidence again from 0.4 µm. Hence in the range of 0.2-0.4 µm, the efficiency of the HEPA H13 filter reduces in laboratory and hospital conditions from 100% to 99.95%. The coronavirus diameter ranges from 0.06 µm to 0.12 µm, therefore this is the size the HEPA H13 and H14 filters are a perfect solution to get rid of it. We install the H14 class filter in SAFE AIR devices, whose minimum performance was documented with a testing result of 99.99803%. It is very important to pay attention to the tightness of the filter itself to make the device actually clean the air, not intensify blowing unwanted particles around the room. In the case of filters used in our devices SAFE AIR ensures 100% filter tightness laboratory confirmed. If you have more questions, safeair.ae
is this a low key ad for EnviroKlenz? :) Thanks for the video, I assume that carbon capture also uses a form of chemisorption but going to look into the details of that now.
If nitrogen diatomic molecues are 90 degree at each other because of vibration and spin then they may automativally reorient light and sound in an most slowest time
Literally every single video I have ever posted. Right below the video. I don't understand how anyone wouldn't be able to find them. You literally had to have passed them to write this comment.
@@ProfessorDaveExplains There are 10+ links in your description. None of them seem to link to shirts. Not the Patreon, the Facebook page doesn't work, the Twitter is just a Twitter. Am I just an idiot?
Oddly enough I not long ago bought an air purifier, hoping it would reduce dust in an aid to cleaning and for pollen removal.. Had I seen this when you uploaded it I'd have bought one earlier.
I knew that there were other molecules in the air that we breathe, but I didn’t know it contained less than 25% oxygen. Thanks for the video Professor Dave, very insightful.
I guess the only portion not covered about the enviroklenz is the cartridge disposal method. Is it still as environmentally friendly as using the device itself? PS: Not trying to bring any negativity here, just trying to get some extra information on all angles. Great video, btw :)
Hey on a serious note, i would like to tell you that you can increase your subscribers 10 folds by targeting indian crowd and exams like NEET which approximately 15 lakh Indian students give every year
Professor DAVE I truly mean this, May GOD JESUS CHRIST Continue to bless you with Wisdom & Knowledge & Prosperity! You earned my Subscription my friend! May GOD bless you with abundance of FAITH, JOY, HEALTH, & RICHES!!! 🙏 Your information will change lives
Well, depends on what you're referring to. Obviously industrial emissions weren't present. But pathogens sure were. Plenty of harmful things existed before modern society.
Lol its to be so ignorant : Jesus Christ peace be upon him spoke aramaic, do u Know how WE Say God in aramaic ? Google it u mor*on.. that s Why even arab trintarians (What u call Christian) use Allah in their arabic bible for God. Plus, the dajjal is Creed is the one teaching that God The Immortal got killed by a satanist roman soldier using a cross that u need to glorify n Say That thus Jesus (God for u)become cursed (Paul galatians) while satan is the lord of the World. Meanwhile in Islam Jesus peace be upon him is blessed all the Time n satan is cursed before reading the Quran n God is nothing like any creation n is Immortal never dies never have to resurrect like all mortals
@@ProfessorDaveExplains well, you don't just use activated carbon for trapping smaller molecules, you would rather use micro sieves that are made of charcoal and made for different molecule sizes. Also, the "holes" are more shaped like small caves instead of a half sphere as depicted in your video.. the whole trap effect wouldn't work if it was in that shape.
Well I can concede that I didn't take the time to painstakingly animate the precise geometry of the material. Even if I knew how to do that it would take too long and add very little. The principles of chemisorption are in place.
Dust or contaminats can also (and normally does) contain thousands of skin cells, or epidermal cells, both plant and animal based. This includes human skin cells. That I kind of creepy to think about. You breath in someone else's skin cells ALL THE TIME.
Thank you, thank you, thank you Professor. Your chemistry course is wonderful. The best I've ever watched or read. Even the Intro video was very instructive, and what you said about learning chemistry should be said as an introduction to every science course ... because it is the very definition of science: "unless you fundamently understand molecules, all you can do is repeat things you've heard ... but how do you know if what you've heard is right ?". I fell in love with this quote and couldn't help but say it to all the people I know whose reasoning is medieval and not scientific (and there are many of them). I live in Algeria by the way.
My students are crushed about the haircut. They miss the hair. Love you and your videos dude, keep it up.
haha aww man! tell them i will grow it back one day
Regarding HEPA Filters I would say this.
There are many myths and legends about air purifiers. Scientific research is not always consistent with the practice. To understand if air purifier with a HEPA filter can help fight against coronavirus, we must first understand how it works, and above all, its effectiveness.
If the manufacturer informs that the HEPA filter of a given class (e.g. Commonly used E12 or H13) removes 99.5 or 99.95 the percentage of particles with a diameter of 0.3 µm, this means that 0.3 µm are the most difficult to remove particles for this filter.
On the other hand, for both larger and smaller particles - due to their specificity it results in greater coping results.
It is wrong to claim that all particles below 0.3 µm somehow "squeeze" through the filter (such erroneous opinions can be found on the internet). Quite the opposite - HEPA filters perfectly capture particles as small as 0.01 µm, due to the phenomenon of molecular diffusion. This works more effectively on particles smaller than 0.2 µm.
On the other hand, inertia mechanisms give maximum confidence again from 0.4 µm. Hence in the range of 0.2-0.4 µm, the efficiency of the HEPA H13 filter reduces in laboratory and hospital conditions from 100% to 99.95%.
The coronavirus diameter ranges from 0.06 µm to 0.12 µm, therefore this is the size the HEPA H13 and H14 filters are a perfect solution to get rid of it.
We install the H14 class filter in SAFE AIR devices, whose minimum performance was documented with a testing result of 99.99803%.
It is very important to pay attention to the tightness of the filter itself to make the device actually clean the air, not intensify blowing unwanted particles around the room.
In the case of filters used in our devices SAFE AIR ensures 100% filter tightness laboratory confirmed.
If you have more questions, safeair.ae
You have no idea how helpful all your videos were, I really think I now have a solid understanding of the basics of chemistry.
I've wanted to understand the science behind air purification. Thanks for the great video.
I always love when he explains why knowing all this stuff is so exciting and useful within humanity's history
Awesome channel. So glad I stumbled on to it.
is this a low key ad for EnviroKlenz? :) Thanks for the video, I assume that carbon capture also uses a form of chemisorption but going to look into the details of that now.
that's a great sales pitch.
thanks pro dave
If nitrogen diatomic molecues are 90 degree at each other because of vibration and spin then they may automativally reorient light and sound in an most slowest time
Ever considered some Dave Explains merch? Because I think that would be a fun way for people to support you
Bud I've got my shirts displayed under every single clip! Feel free to snag one :)
@@ProfessorDaveExplains I haven't been able to find it. Which link?
Literally every single video I have ever posted. Right below the video. I don't understand how anyone wouldn't be able to find them. You literally had to have passed them to write this comment.
@@ProfessorDaveExplains There are 10+ links in your description. None of them seem to link to shirts. Not the Patreon, the Facebook page doesn't work, the Twitter is just a Twitter. Am I just an idiot?
It’s not a link. They are physically displayed on every single video page. Look directly above the comments section.
Oddly enough I not long ago bought an air purifier, hoping it would reduce dust in an aid to cleaning and for pollen removal..
Had I seen this when you uploaded it I'd have bought one earlier.
Hey, can you do a course on crystallography? That would be very helpful.
I knew that there were other molecules in the air that we breathe, but I didn’t know it contained less than 25% oxygen. Thanks for the video Professor Dave, very insightful.
I feel like this is more relevant than ever
Apparently HEPA filters do you remove smaller particles as well a common misunderstanding
thanks prof dave am kepris from nigerian
Good to know
thanks for making learning enjoyable !!
I guess the only portion not covered about the enviroklenz is the cartridge disposal method. Is it still as environmentally friendly as using the device itself?
PS: Not trying to bring any negativity here, just trying to get some extra information on all angles. Great video, btw :)
Proffesor have you made a video on w/w,w/v and v/v calculations???
i just finished watching this whole playlist (all 80 videos) in 2 days ??? who else is studying during corona virus era?
Hey on a serious note, i would like to tell you that you can increase your subscribers 10 folds by targeting indian crowd and exams like NEET which approximately 15 lakh Indian students give every year
True.. like all this reaction channels are doing
How diatomic molecules hold on to its atoms?
Learnt something new today
Thanks for it man😉👍
Isn't there some H2O in the air as well?
That depends on the air humidity
How much is this product professor Dave?
Nice information
Dave: The most important substance to our existence is oxygen.
Quarks: Are we a joke to you?
Are quarks a substance tho?
What could you say are some CONS of the chemisorption method for EnviroKlenz Adsorptive Surfaces?
Please consider using the term consumer less frequently in your vocabulary.
Professor DAVE I truly mean this, May GOD JESUS CHRIST Continue to bless you with Wisdom & Knowledge & Prosperity! You earned my Subscription my friend! May GOD bless you with abundance of FAITH, JOY, HEALTH, & RICHES!!! 🙏 Your information will change lives
@2:49 Is methane a contaminant?
🌎#fascinating #savetheearth #earthscience #ourplanet #impressive #savetheplanet #humanlife #superior #humanity #civilizations #incredible #icedistrict #albertans #alberta #thankyou #canada #oneplanet #earth🌍 #space #spacex #scienceandtechnology #spacetechnology #mars #humans #megaprojects #airpurfifcation #machinery #actnow🌏
🏆
Delhi mein roj har din hote air pollution ko rokne k liye army helicopter se water rainfall karwaye, isse aasmaan fir se saaf ho jayega.
Is this video sponsored by the air purifierM
although in the past the air was more pure
Well, depends on what you're referring to. Obviously industrial emissions weren't present. But pathogens sure were. Plenty of harmful things existed before modern society.
@@ProfessorDaveExplains
Oh yea I forgot about the pathohegens
Lol its to be so ignorant : Jesus Christ peace be upon him spoke aramaic, do u Know how WE Say God in aramaic ? Google it u mor*on.. that s Why even arab trintarians (What u call Christian) use Allah in their arabic bible for God. Plus, the dajjal is Creed is the one teaching that God The Immortal got killed by a satanist roman soldier using a cross that u need to glorify n Say That thus Jesus (God for u)become cursed (Paul galatians) while satan is the lord of the World. Meanwhile in Islam Jesus peace be upon him is blessed all the Time n satan is cursed before reading the Quran n God is nothing like any creation n is Immortal never dies never have to resurrect like all mortals
@@mbarnabeus Hi I'm the antichrist
Sub cancelled...
Good riddance.
So wrong..
Um, no.
@@ProfessorDaveExplains well, you don't just use activated carbon for trapping smaller molecules, you would rather use micro sieves that are made of charcoal and made for different molecule sizes. Also, the "holes" are more shaped like small caves instead of a half sphere as depicted in your video.. the whole trap effect wouldn't work if it was in that shape.
Well I can concede that I didn't take the time to painstakingly animate the precise geometry of the material. Even if I knew how to do that it would take too long and add very little. The principles of chemisorption are in place.
do you just not know what youre talking about or are you having an episode of some kind?
Dust or contaminats can also (and normally does) contain thousands of skin cells, or epidermal cells, both plant and animal based. This includes human skin cells. That I kind of creepy to think about. You breath in someone else's skin cells ALL THE TIME.