I started working in architecture 8 mos. ago and when I first started, the detailed drawings of how specific assemblies go together looked so alienesque. I've been learning that a building goes together the way it does largely to mitigate the intrusion of different environmental forces like moisture, sun, and wind that work to deteriorate a building. The more effective a bldg is at resisting these natural forces(due to being assembled correctly with appropriate materials), the less money the owner/operator of the building has to pay over time in maintenance/repairs. When you own a home, you essentially operate a building and part of being able to afford a home not only includes paying the mortgage and taxes, but also the cost of maintaining the home itself. With that being said, certain parts of a roof is designed the way it is not for aesthetics, but due to surface tension and capillary action that wants to drive water into the building that must be repelled by thoughtful design...that can also look nice as a secondary function. Before starting architecture, I had no idea how much building science informs design.
short haired dave caught me so off guard i literally yelled "WOAH WHO IS THIS" 😭😭😭😭😭😭 Jokes aside,,, beautiful vid again U r saving my love for science sobs
SImple and clear. I must have learned all this in high school, but until seeing your video I could not explain it. Excellent video. Probably not for the the complete novice, but excellent for a student studying the subject.
How convenient is it, that I missed the chemistry lecture explaining these IMF relationships for liquids (don't ask me how, it's embarrassing), just to see Professor Dave upload a detailed concise video explaining them the very next day? You're my favorite, Dave.
While watching I thought "what about surface tension"? Answered. Then I thought "what about water going up a tree"?. Again, answered. You have a knack for providing great examples. Thank you.
When I was taking my General Chemistry courses I was *heavily* watching chemistry videos on UA-cam (2-3 hours a day for about a year: you, Bozeman Science, Tyler Dewitt, The Amoeba Sisters, Khan Academy, Cody's Lab, Nurdrage, NileRed, etc.) and saw just about every one of your older chemistry vids. Was wanting to maintain and build on my chemistry knowledge (Gen-Chem was my science elective for my Associate degree in Business and thinking about going back to pursue a more advance science degree) so it came as quite a shock when I saw the new haircut... I suppose it cuts down the countless "Thank you chemistry Jesus!" comment that I kept seeing on you vids. =P This vid really added to my knowledge since my Gen-Chem courses did not have any detailed emphasis on these liquid properties, they were covered briefly in lecture, but was never put in a quiz or test.
hi! I've been watching your videos since we discussed quantum numbers. As we are proceeding I was shocked you cut your remarkable hair hehe. But then thank you for your help!! Continue teaching, Sir Dave!
there is an android app play market called Viscosity calculator (by Tarbanov) that calculates dynamic viscosity of water solutions in respect to temperature and salinity
PeKame PeKame no because u can see the tube is itself open so the surface it is at atmospheric pressure I think u are talking about the mercury experiment in which the tube is closed and has vacuum created inside it
Very informative video, thanks. Do you have time to answer a question for me? I have a small vessel filled with water. A thin tube (1.5mm inner diameter) hangs an arbitrary distance below the surface and the top is attached to a valve that allows me to release ink into the water. When the valve is open, ink flows freely. When I close the valve, a vacuum is created at the top of the tube, so the flow of ink stops. However, through what I assume is capillary action, water from the vessel is pulled into the tube, apparently displacing ink, which then leaks into the vessel. This continues until all of the ink in the tube has leaked out. My question is, is there any way to prevent this leakage from happening? I cannot change the viscosity of either the ink or the water. The tube could be modified if that would help, but not to the extent of using a much larger diameter tube. I hope you find this question interesting and I'd be most appreciative if you can answer it. Thanks very much!
In my country we learn that water has high viscosity. N.B. Viscosity is the measure of how a fluid flows easily. Please, could you define it for me more?
Hey Dave! Thanks for the video :). I was wondering if you could answer a question. If I put water in a non-polar container, such as plastic, would that mean the meniscus would become convex since the cohesion is greater than the adhesion? P.S. I as asking this because when I google this situation it says that the meniscus would be neither. It says it would be flat?!
Density is related to concavity as radiation is related to convexity? A gas through a viscous material presses away from gravity convexity to get to a more concave state in the surrounding gas. Take schampo and watch air bubbles move away from centre of earth at speeds dependent on bubble size.
Could someone help me with two questions? 1) Why does not water want to reduce the amount of hydrogen bonding occurring by increasing the surface area? 2) Why does to maximize hydrogen bonding let the system to sit at the lowest energy possible?
Question: I watched a video by Action Lab not to long ago describing capillary action. If I remember correctly, he mentioned that the air pressure in the smaller tube is lower, further minimizing the forces acting against capillary action. Is this correct?
it is - if there some pressure acting on it, the water wouldn't come up as easily. as mentioned in the video, on a large enough scale adhesion and cohesion can be outweighed by other factors such as gravity, pressure seems to be one of them.
Haven't watched one of these videos in a minute. Had to rewind bc I spent the first few seconds yelling HE CUT HIS HAIR???? looking good Professor Dave, prepare to save on shampoo lol!
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
An excellent demo----and not ruined by background music. About perfect!
I started working in architecture 8 mos. ago and when I first started, the detailed drawings of how specific assemblies go together looked so alienesque. I've been learning that a building goes together the way it does largely to mitigate the intrusion of different environmental forces like moisture, sun, and wind that work to deteriorate a building. The more effective a bldg is at resisting these natural forces(due to being assembled correctly with appropriate materials), the less money the owner/operator of the building has to pay over time in maintenance/repairs. When you own a home, you essentially operate a building and part of being able to afford a home not only includes paying the mortgage and taxes, but also the cost of maintaining the home itself.
With that being said, certain parts of a roof is designed the way it is not for aesthetics, but due to surface tension and capillary action that wants to drive water into the building that must be repelled by thoughtful design...that can also look nice as a secondary function. Before starting architecture, I had no idea how much building science informs design.
where did your long hair go, u look less like chem jesus now
🤦🙄
😢
Fr
@@prosp3421 Hater fr
Always a jesus. that's the important point
This called "quality content". Thank you so much you saved my day!
short haired dave caught me so off guard i literally yelled "WOAH WHO IS THIS" 😭😭😭😭😭😭 Jokes aside,,, beautiful vid again U r saving my love for science sobs
thank you for the very simple explanation. I am an engineer and used the concepts for years but I understood completely now.
SImple and clear. I must have learned all this in high school, but until seeing your video I could not explain it. Excellent video. Probably not for the the complete novice, but excellent for a student studying the subject.
Your intro is the best part of the video!
Dude, I love the content you show.
How convenient is it, that I missed the chemistry lecture explaining these IMF relationships for liquids (don't ask me how, it's embarrassing), just to see Professor Dave upload a detailed concise video explaining them the very next day?
You're my favorite, Dave.
11 ua-cam.com/channels/gnq8tH5o-X3byKaMsuwqHA.htmlvideos
Of which country are you
how
bro that is very embarrassing. imagine missing a class
@@siddarthbatchu9978💀
Thx professor! when I get my high school degree you'll definitely be one of those who has helped. And helped a lot!
He knows a lot of science stuff professor Dave explains
This is really the most helpful explanation I've ever come across
Saying Tnx only can not express my real feeling Sir you are just a real proffesor of SCIENCE 😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍
I hate chemistry so much but you make it bearable thank you
thank goodness i have a science test today thank youuuu
Very great video understood everthing. Clear and concise info given
Omggg my teacher took whole half month to explain these but i wasn't clear, and after your content i am soo clear 😵💫
i needed this video for my science assignment like a month ago and i only got B's, thanks.....
Best teaching 👊👊👍😘😍
that was such a beautiful concise video. just what i needed the day before an exam
finally I could understand all about viscosity
While watching I thought "what about surface tension"? Answered. Then I thought "what about water going up a tree"?. Again, answered.
You have a knack for providing great examples. Thank you.
Itz capillarity
11 ua-cam.com/channels/gnq8tH5o-X3byKaMsuwqHA.htmlvideos
Covid 19 GMA news 70
Thank you for this lesson Prof
When I was taking my General Chemistry courses I was *heavily* watching chemistry videos on UA-cam (2-3 hours a day for about a year: you, Bozeman Science, Tyler Dewitt, The Amoeba Sisters, Khan Academy, Cody's Lab, Nurdrage, NileRed, etc.) and saw just about every one of your older chemistry vids. Was wanting to maintain and build on my chemistry knowledge (Gen-Chem was my science elective for my Associate degree in Business and thinking about going back to pursue a more advance science degree) so it came as quite a shock when I saw the new haircut... I suppose it cuts down the countless "Thank you chemistry Jesus!" comment that I kept seeing on you vids. =P This vid really added to my knowledge since my Gen-Chem courses did not have any detailed emphasis on these liquid properties, they were covered briefly in lecture, but was never put in a quiz or test.
Great video! My students found it very informative!
Phenomenal work♥️
Thank you very much...You give the best practical explaination on youtube
and he comes to save my grades once again!
Thank you, chemistry jesus for saving me
TOO EASY AND SIMPLE.I HAVE A GOOD REASON TO STUDY NOW
I like your new look professor. Thanks for your videos, they help us a lot.
Thanks a lot 😊 understood better than the textbook ☺️
you deserve more 10 million subscribers
Wow this video is so wonderful and educative to learner's
👏👏👏👏👏👏
Thank you for making our school life easier. Keep going!!!
the best intro ive ever seeen
Pacing is perfect and it goes in a very logical way. Thank you!
Okay this is the best video I've seen on this topic
Thank you tons!!
Nice explanation ❤
hi! I've been watching your videos since we discussed quantum numbers. As we are proceeding I was shocked you cut your remarkable hair hehe. But then thank you for your help!! Continue teaching, Sir Dave!
This was such a great video!!
thank you a lot I have exam and I can't understand from my teacher . you save me thank you prof.
there is an android app play market called Viscosity calculator (by Tarbanov) that calculates dynamic viscosity of water solutions in respect to temperature and salinity
@5:40 surface tension tends to minimize surface area right? but video says tends to increase surface area.
yes it minimizes it, so energy is required to increase it, by say, puncturing the surface.
11 ua-cam.com/channels/gnq8tH5o-X3byKaMsuwqHA.htmlvideos
He knows alot science stuff professor Dave explains ❤️
Can you make a video about rheology (shear stress, shear thinning, shear thickening, ...) ?
Awesome video btw!
SUBCRIBED because the example is too perfect
11 ua-cam.com/channels/gnq8tH5o-X3byKaMsuwqHA.htmlvideos
Thanks for the visual explanation
FANTASTIC EXPLANATION of several aspects of liquids. AWESOME!!! ❤
Great explanation
8:39 , doesn't that happen because of the atmospheric pressure pressing on the wanter on the outside of the tube ?
PeKame PeKame no because u can see the tube is itself open so the surface it is at atmospheric pressure
I think u are talking about the mercury experiment in which the tube is closed and has vacuum created inside it
11 ua-cam.com/channels/gnq8tH5o-X3byKaMsuwqHA.htmlvideos
Perfect and Simple presentation. Thank you
Thanks for this explanation
11 ua-cam.com/channels/gnq8tH5o-X3byKaMsuwqHA.htmlvideos
Awesome work Dave!!
Great Explanation..!
I have to say this is very interesting as I am a food science student water is very basic and important ingredient. Thank you for explaining
Very informative video, thanks. Do you have time to answer a question for me? I have a small vessel filled with water. A thin tube (1.5mm inner diameter) hangs an arbitrary distance below the surface and the top is attached to a valve that allows me to release ink into the water. When the valve is open, ink flows freely. When I close the valve, a vacuum is created at the top of the tube, so the flow of ink stops. However, through what I assume is capillary action, water from the vessel is pulled into the tube, apparently displacing ink, which then leaks into the vessel. This continues until all of the ink in the tube has leaked out. My question is, is there any way to prevent this leakage from happening? I cannot change the viscosity of either the ink or the water. The tube could be modified if that would help, but not to the extent of using a much larger diameter tube.
I hope you find this question interesting and I'd be most appreciative if you can answer it. Thanks very much!
can you explain why water doesn't fall from an inverted tumbler if we place a strainer at the mouth of the inverted tumbler??
1:05 Viscosity
In my country we learn that water has high viscosity.
N.B. Viscosity is the measure of how a fluid flows easily.
Please, could you define it for me more?
Sir, I had one doubt. What are polar and nonpolar surfaces?
Professor, is there any substance that can easily move through viscous liquids.
Hey Dave!
Thanks for the video :). I was wondering if you could answer a question. If I put water in a non-polar container, such as plastic, would that mean the meniscus would become convex since the cohesion is greater than the adhesion?
P.S. I as asking this because when I google this situation it says that the meniscus would be neither. It says it would be flat?!
A convex surface will be formed with decreased level of height than the rest of the liquid
Density is related to concavity as radiation is related to convexity? A gas through a viscous material presses away from gravity convexity to get to a more concave state in the surrounding gas.
Take schampo and watch air bubbles move away from centre of earth at speeds dependent on bubble size.
11 ua-cam.com/channels/gnq8tH5o-X3byKaMsuwqHA.htmlvideos
u make chemistry interesting
Good one Professor Dave.
Sir! Why water in glass tube has concave meniscus? while due to hydrogen bonding in water molecules cohesive foces should be strong.
the interactions with the silicates in the glass are even stronger
Does surface tension also resist something trying to exit a blob of fluid?
can you explain why surface tension formula is y = F/2L? why there's 2 in it?
This video helped alot, thank you sir 💕.
Thanks a lot professor Dave for such easy and wonderful explanation
11 ua-cam.com/channels/gnq8tH5o-X3byKaMsuwqHA.htmlvideos
I like your hair these way, it goes with you
Tx for the update
Damn I finally understood all...thanks bro
Thank you sir because of you I understud such tough concept 😭😭😭😭😭🙏🙏🙏🙏
Could someone help me with two questions?
1) Why does not water want to reduce the amount of hydrogen bonding occurring by increasing the surface area?
2) Why does to maximize hydrogen bonding let the system to sit at the lowest energy possible?
Thankyou professor Dave ily so much!!!
Perfect explaination
Thank you Mrs
Very great thank you so much 💚💜
Well explained! Respect!
Teaching method is very cool
11 ua-cam.com/channels/gnq8tH5o-X3byKaMsuwqHA.htmlvideos
Thank you sir iam in kerala
Professor dave is the man 🤗😎
Thank you
Good explanation.. Keep it going
11 ua-cam.com/channels/gnq8tH5o-X3byKaMsuwqHA.htmlvideos
Wow thank you..
You helped me a lot.❤️
Thank you so muchhh!!!
Does surface tension keep the particle separate? What is the definition of surface tension?
Love from India 💕
Jesus must've had some very high surface tension in his legs.
thank you
Why adhesive force is stronger than cohesive when water is put in a glass tube although glass is a non polar substance.
What is meniscus
Professor dave i really appreciate your work its easy😘😌😌😌😌😌😊😊👍👍👍👌👌👏👏
thank youuuu❤❤
Question: I watched a video by Action Lab not to long ago describing capillary action. If I remember correctly, he mentioned that the air pressure in the smaller tube is lower, further minimizing the forces acting against capillary action. Is this correct?
it is - if there some pressure acting on it, the water wouldn't come up as easily. as mentioned in the video, on a large enough scale adhesion and cohesion can be outweighed by other factors such as gravity, pressure seems to be one of them.
So good, thank you
Haven't watched one of these videos in a minute. Had to rewind bc I spent the first few seconds yelling HE CUT HIS HAIR????
looking good Professor Dave, prepare to save on shampoo lol!