The Sci Guys: Science at Home - SE3 - EP7: Comparing Surface Tension - Penny Surface Tension
ฝัง
- เผยแพร่เมื่อ 4 พ.ค. 2015
- Welcome to science at home episode seven, season three. In this episode we compare the surface tension of multiple liquids by dripping drops of a liquid on a pennies surface. Surface tension can vary a lot between liquids and the bigger the droplet grows before it bursts, the stronger a liquids surface tension is. By the end of this video you will be able to describe what surface tension is, how it helps to create a dome of liquid and why the droplets eventually burst.
Help support us to do more experiments by becoming a patron on patreon: / thesciguys
Equipment and Ingredients:
Water
Honey
Corn Syrup
Maple Syrup
Olive Oil
Vegetable Oil
Lamp Oil
Cream
Dish Soap
Rubbing Alcohol
Food Colouring
Eye Dropper
Pennies
Small Bowl
Gloves
Lab Coat or Apron
Goggles
Previous Episode: Egg in a Bottle - • The Sci Guys: Science ...
Next Episode: Simplest Electric Motor - • The Sci Guys: Science ...
If you enjoyed the video remember to subscribe, comment and like us to show us you care.
Remember to like us on Facebook: / thesciguys
Follow us on Twitter: / thesciguys
![[ LIVE ] Rank เล่นแต่แครี่ ยาวๆถึง 100ดาว “วันนี้มีกิจกรรมลุ้นรับสกินมาบอกต่อ โก๋แก่ช็อกโกบอล x ROV”](http://i.ytimg.com/vi/5NNgkhWj57Y/mqdefault.jpg)
Lol I have to watch these videos because our science teacher told us to 🧪
same yoooo
Same 🍳🍳
same, waste of 5 min in my life
Same! I could have done the lab, but I had to watch this because my clumsy self spilled the oil
same
When my son asks "why dose water come back together" the thoughts of how I would have to look it up and refresh my mind on the subject seemed a little exhausting. them I thought... or I could show him a TH-cam video saving me solo much time! thanks guys.
also, y'all have the best dry humor I have ever seen.
+Sean Mckinney you're very welcome. Let us know if you have topics that you would like us to cover.
Exactly! This really helps me a lot to do our experiment in Physical Science. Just keep it up!!
Is there any relation between surface tension,density and viscosity
I love this video and surface tension.
In answering the question about the relationship between density and surface tension, Yes- the greater the density, the higher the surface tension. The lower the density, the lower the surface tension.
This might just work as a qualitative experiment for the guest junior high school students coming to my school next week, before going on to do a quantitative examination using the Du Nuoy ring method and contact angle determinations as well...... Thanks for the wonderfully simple video of an experiment which I have no doubt young, inquisitive kids really enjoy. I'm old, and I know I'm about to enjoy it!
Great video!
It would be nice if you guys explained why high surface tension of water is important to chemical reactions and to life, or even what's the relation between viscosity and surface tension.
Alande Amorim Those are great ideas. We are hoping to launch a second series where we answer bigger questions like these. I will add them to the list for videos to do :)
Is there surface tension on larger bodies of water like lakes and oceans?
do you guys know what the number of droplets is for resin
+TheSciGuys Thank you guys. You really helped me!
+kartik You're most welcome :)
Interesting. Thanks! We watched another penny water vid and theirs only held 17 drops. I wonder if the colouring added extra surface tension?
Ooo nice 😆😆
You forgot something - the reason why the drop count was roughly the same for all liquids (with water being a bit of an outlier) ... as surface tension increases, so does the size of each drop, so the number you're getting is not really to do with the strength of the surface tension, it's to do with the ratio between the end of the dropper and the edge of the coin. For example, a liquid with a surface tension that's twice as strong will form bigger droplets before gravity overcomes this and the droplet falls, so you add more liquid to the coin, so you need fewer drops to transfer the same amount of liquid, hiding the fact that surface tension is greater.
Liquid density plays a greater roll here, as the same surface tension can hold a droplet of lower volume before it breaks off
thank you, u answered my CER.
wow, um ok
And that’s science baby
Love! So awesome
Does cooking oil have the same surface tension as vegetable oil?
Very nice video.
It makes my class interesting for kids.
You guys are awesome, can't believe you have less than 10k subscribers
ThorntonEditing Thanks!! We are growing and cannot wait to hit 10k because we have a special experiment planned that will blow everyone's minds :)
+The Sci Guys any clues? or is it done now?
Get rid Of Money We did a quantum levitation experiment :)
I wish we had this when I was younger.
thanks
cool!
the drop size depends on the surface tension. So the water drop will have a larger volume than a drop of alcohol, even if count 42 drops for water and 29 for rubbing alcohol, the volumes are double
How many drops for the chocolate syrup?
U didn’t record the chocolate syrup
cool!!!!!!!!!!!!!!!!!!!!!!!!!!!!
So how do they turn baby’s into baby oil
I love your videos, that you have female representation, and the simplicity of your animated video explanations. How can I learn how to make animated videos like that?
Jill Berrner Thanks :) We love that you love our videos. We love that Theresa was willing to put up with us guys and join the team :) You can learn to make videos like this by learning after effects, animation basics and how to draw in illustrator.
Thats adhesive force not cohesive.
what about chocolate syrup ???
I already did it
POV your in aquatics class rn
gravity presses down on my droplet and when the surface area is small the cohesive forces within the drop are much stronger than gravity and the droplet is able to hold it's shape the more alcohol I add to our droplet the more molecules are added and the larger the droplet size and surface are gets as the surface area of my droplet increases the amount of force the gravity exerts on a drop it also increases causing the cohesive forces inside the alcohol to struggle to hold it's shape eventually when enough alcohol has been added of my droplet the amount of gravity pushing down on the droplet will overpower the cohesive forces within the liquid causing the droplet pop.
Oo welll explaind👀👉💰💵 🤘💯👭👑
3:29 - 4:05 ????
@@iammagunthe27 hahahhahahhahahahahahhahaa i copy it for the project hahahhahahahahhahahah
@@vention7742 HAHAHAHAHA sorry, thought you wouldn't reply.. I didn't mean to be rude
@@iammagunthe27 that's fine...have a nice day also!
They stole pennies!!!!!!!!!!!!
I know it is not to scale at all but still, your water molecule should show the oxygen atom much bigger than the two hydrogen atoms
+Get rid Of Money Thanks for the input but as you said it's not to scale and we are more focused on showing what is going on and teaching the concepts than the accuracy of the size in molecules.
Jesus loves you
Not a fan..
+Ayden Bird well that is fair. Not everyone needs to be a fan.
Your funny
jeez...
Be cooler👑🐝Or AC