Seven Science Experiments with Surface Tension


  1. Zom Bee Nature

    October 14, 2017 at 11:22 am

    But can you believe what a blond says about physics?
    Everyone, please watch my little nature videos. There is no talking in them. Shhh!

  2. Jonathan Smith

    October 16, 2017 at 5:51 am

    I don't know why the spheres form, but I assume it's similar to how soap bubbles form a spherical shape. (It requires the least amount of energy.) I don't know what the compound is, but it appears to make the molecules adhere to one another, until the energy is lost. I know that some coffee contains 'foaming agents', so that may be all it is.

  3. Jisha P.V

    October 22, 2017 at 11:59 am

    thanks it was helpful

  4. Suburp212

    October 23, 2017 at 1:14 pm

    how did the soap flavored coffee taste?

  5. SmartGamerDude

    November 6, 2017 at 4:51 am


  6. Kapil Chhipa

    November 13, 2017 at 3:36 pm

    Easily explain thanks

  7. Erin OBrien

    November 18, 2017 at 10:53 am

    The little spheres are Anti-bubbles?

  8. purpleblake

    November 20, 2017 at 1:08 am

    We know so much about water and yet there is still lots we don't know about water

  9. David Black

    December 4, 2017 at 1:52 am

    If you put soap on your finger you can touch a bubble without popping it. I love that one.

  10. Martin Hazard

    December 8, 2017 at 4:27 pm

    titulo en espaรฑol

  11. Nahla Ashraf Thabet

    December 13, 2017 at 9:06 pm

    I still didn't understand the relation between water's surface tension and hot surface at last experiment

  12. Physicist Without a Degree

    December 19, 2017 at 8:06 pm

    Your rooster is saying Happy Physicsing…

  13. kushal kollu

    December 31, 2017 at 9:04 am

    Someone explain the first experiment

  14. rohit ranjan

    January 1, 2018 at 11:13 pm

    Good one

  15. Monjipour

    January 5, 2018 at 12:04 am

    Last time I had a coffee, I saw antibubbles forming… I know for a fact that was only water, coffee and sugar and it was in a paper cup so no dish soap
    Could the coffee or sugar be creating this ?

  16. CGS

    January 10, 2018 at 5:38 pm

    so horny
    so hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso hornyso horny


    January 13, 2018 at 6:32 am


  18. R BK

    January 18, 2018 at 5:34 pm

    Yes…I had been always seeing the last one in my pan

  19. smruti ray

    January 22, 2018 at 7:15 am

    The spherical water phenomenon has been well explained by @Destin Sandlin
    on his channel Smarter everyday in one of his videos

  20. Montague Cush

    January 28, 2018 at 3:41 pm

    Surface tension

  21. R vd kolk

    January 31, 2018 at 9:32 pm

    Can it be that it has something to do with the dark side of the moon?

  22. Steve Cooper

    February 1, 2018 at 4:03 pm

    Thanks to mom for filming and letting you spill water all over!?

  23. Kingshuk mallick

    February 13, 2018 at 6:59 pm

    what type of colour did you use? we tried with food colouring and it did not work out.

  24. seededsoul

    February 14, 2018 at 11:16 am

    watching your vids is giving me milk fireworks

  25. Montague Cush

    March 9, 2018 at 10:28 pm

    Surface tension

  26. Ashish Shukla

    March 26, 2018 at 5:44 pm

    I love you ๐Ÿ˜๐Ÿ˜

  27. Spike Volcanohead

    March 31, 2018 at 3:07 am

    The most likely reason for soap/bubbles in your coffee is a poorly-rinsed mug or 'possibly' the use of a glycerin "anti-streaking agent" in the dishwasher.

  28. Vicky Garcia

    April 6, 2018 at 10:02 pm

    Itโ€™s anti bubbles

  29. Rakhi Tailong

    April 7, 2018 at 7:20 pm

    What is the reason for the last experiment???

  30. AlexGastro

    April 15, 2018 at 12:15 am

    This is avery old video, but i didnt see anu comment pointing out that grinded coffee (like in a coffe shop) contains oils, much more than old grinded coffee, like the ones at the store, and of course more than soluble coffee, also could be that the mug had soap residues from when it was cleaned.

  31. da man

    April 19, 2018 at 12:48 am

    Wow your so smart, Love your videos ๐Ÿ™‚

  32. x8db8x

    April 21, 2018 at 12:50 am

    sorry, wrong channel ๐Ÿ™‚

  33. kilroy987

    April 24, 2018 at 4:01 pm

    So soap wrecks surface tension in water, but generates it in milk and coffee?

  34. Jasurian Moodley

    April 26, 2018 at 9:21 pm

    Physics Girl, I love your videos ๐Ÿ˜†…. Wish I took physics in high school ๐Ÿ˜’

  35. audrey morgan

    April 28, 2018 at 12:44 am

    The spheres are called anibubbles and you already made a video on them

  36. Luffy

    May 2, 2018 at 8:57 am

    i want to know more about that chicken

  37. Ashwin Singh

    May 4, 2018 at 2:29 pm

    Number 4 is not surface tension itโ€™s the air pressure difference between the inside and the outside. The clue that itโ€™s not surface tension is the fact that you can break the surface tension with a paper clip (as you did) and it still doesnโ€™t let the water out. I suppose the screens action is to prevent a large nucleation site for air bubbles to form on and then make their way up through the water? Not sure about that part entirely like what the effect of the screen is.

    As for number 2, the reason is probably something to do with how soap molecules on a surface of water align their hydrophobic sides on the outside of the water, and so I guess when you turn them into small bubbles that creates a hydrophobic film which cannot mix with the water body below it. Thatโ€™s why the droplet remains there and doesnโ€™t just go straight back into the water. I do wonder what was in your coffee the first time you saw this…

  38. littlesnowflakepunk

    May 11, 2018 at 11:12 pm

    Kinda wish Cmmdr Chris Hadfeild were still in space so he could experiment with breaking surface tension with soap on spheres of water in microgravity

  39. Kevin Favro

    May 18, 2018 at 7:23 pm

    Che figa

  40. Toto 905122

    May 24, 2018 at 12:11 am

    Anti bubbles

  41. Huong Huyen Huynh (Victoria)

    May 30, 2018 at 11:06 am

    Can you explain me the paper clip experiment?

  42. Quahntasy - Animating Universe

    June 18, 2018 at 9:49 am

    Who is here in 2018?

  43. unicycle

    June 25, 2018 at 4:28 am

    About soapy droplets:
    If there are capillary waves then air cushion below droplet is replenished. Surface tension makes wavelength longer : So tiny vibrations keep replenishing the air cushion below the droplets.

  44. Julien Ortega

    June 27, 2018 at 5:42 am

    I think the coffee sphears may also be caused by grease as i find it particularly noticeable in waffle house or fast food coffee

  45. OniFeez

    June 30, 2018 at 5:27 am

    Why would you think to put soap in your coffee to try and duplicate the effect? :O

  46. Anand Mohan Kalam Academy

    July 6, 2018 at 8:36 pm

    Great stuff on Surface Tension.

  47. shiv chauhan

    July 16, 2018 at 4:16 pm

    Perhaps in the coffee soap thing, the coffee molecule – coffee molecule bonds are stronger than coffee molecule -soap molecule bond and thus remains separate like mercury balls on a table….

  48. Sean Whelan

    August 24, 2018 at 6:48 pm

    Anti bubbles!

  49. shreya rastogi

    September 8, 2018 at 5:43 pm

    Can you explain the reason of the last two experiment

  50. J Morin

    September 13, 2018 at 12:26 am

    Good, BUT, no explanation for kids to know "why" !! You taught them NOTHING (why, or how) . I know why, kids don't. Sry, FAIL. Thumbs down?

  51. Someone Unknown

    September 21, 2018 at 1:19 am

    Soap is the destroyer of surface tension fun!

  52. MeeR'Z Express

    October 7, 2018 at 3:10 pm


  53. Divya Suryawanshi

    October 15, 2018 at 9:55 am

    Superb mam


    October 20, 2018 at 4:06 pm

    I ๐Ÿ‘ฉโ€โค๏ธโ€๐Ÿ‘ฉ u

  55. Andrew Andrus

    October 29, 2018 at 2:29 am

    if you watch this on half speed its pretty hilarious

  56. Johnson Ekka

    October 29, 2018 at 1:58 pm

    i have done that last one many times ,but didnt knew what was that about

  57. navneet kumar

    November 4, 2018 at 5:58 pm

    Spheres in the coffee cup (+ little bit of soap) experiment is in fact anti-bubble. These anti-bubbles jump and move on the parent surface. Researchers are trying to understand the behaviour of wave and particle motion by oscillating the parent liquid. There is a nice video on this though I don't remember the link. I forgot to thank you for nice demos. Cheers.

  58. Janet Carballo

    November 6, 2018 at 4:28 pm

    You can add an extra experiment! Call it "Volcano Bubbles". You just put Baking Powder/Soda To Vinegar and there you go! You get a VOLCANO!!!!!!!!! Really Cool,Right? We've done it at my mom's house!

  59. Staring Hamster

    December 5, 2018 at 2:21 am

    Any of you guys watching this because of chemistry class?

    A joke my school will understand.

  60. Bhuvanitha Priyadharshini

    December 6, 2018 at 4:58 pm

    That's simply cool.. ๐Ÿ‘

  61. Chris Squire

    December 11, 2018 at 11:04 pm

    the balls on the surface are likely oils attracted by the soap, its purpose is to break down grease and oil and oil and water do not mix the attraction of the soap brought it to the surface where it will sit

  62. khushboo kumari

    December 25, 2018 at 3:11 pm

    Nice friend…

  63. bwilly the kid

    January 10, 2019 at 7:09 pm

    Did you have full fat milk or cream in your first coffee?

  64. RN piyush Sen

    January 12, 2019 at 8:01 am

    ๐Ÿ˜‚๐Ÿ˜‚๐Ÿ˜‚๐Ÿ˜‚ ๐Ÿ‘

  65. Aditya Wasake

    February 1, 2019 at 5:51 pm

    Why does the paper clip sink in the water when soap is added

  66. Game Theory

    February 18, 2019 at 1:42 pm

    Nice channel very cool stuffs….I did the same experiments u did and I was really amazed to see all that….thanks a lot

  67. Jugnu Batra

    February 23, 2019 at 5:49 pm

    Nzara aa gya

  68. Abhishek Youniverse

    March 14, 2019 at 9:13 am

    Waah maza aagya..

  69. Rob Ot

    April 27, 2019 at 3:56 pm

    Science made cute.

  70. Red Angry Bird

    May 1, 2019 at 11:05 am

    Cute girls not supposed to be interested in physics, what kind of world we live in nowadays. ๐Ÿ˜‰๐Ÿ˜ช๐Ÿ˜ฒ

  71. Patricio Tourne Passarino

    May 9, 2019 at 5:02 pm
    Smartereveryday has done a video on the second effect

  72. David Chester

    May 16, 2019 at 7:55 pm

    Can you suggest a way that we can use surface tension to drive a machine (such as a wheel), which is not by added chemicals such as soap?

  73. Nadav Shalinsky

    May 21, 2019 at 1:42 am

    Smarter every day explained the water droplet experiment well

  74. Fun Panrom!

    May 28, 2019 at 3:44 pm

    i always do the last one

  75. Super 8

    June 1, 2019 at 10:12 pm

    0:52 it's anti-bubble

  76. Lloyd Dominic Refuerzo

    June 7, 2019 at 3:30 pm

    The thing that was in your coffee is an antibubble. Your future self has already made a video of that.

  77. Michael Skinner

    June 9, 2019 at 12:58 am

    Let's Gooooo!

  78. go back to hong kong or i will keemstar you

    June 14, 2019 at 5:36 am

    woah my favorite part about surface tension is the helicopter battle on the cliff side

  79. liquid klone

    June 21, 2019 at 9:37 am

    Instructions unclear: Burned my favorite pot.

  80. Neil Siebenthal

    July 5, 2019 at 5:59 pm

    I asked my mom for adult supervision to try this. All she said was you're 30!!!

  81. Paulo Gomes

    July 8, 2019 at 11:38 am

    Hi Diana, I would like to share with you the phenomenon that occurs with the drop of milk that "floats" on the milk, this phenomenon is called coalescence. I have a video on my channel demonstrating this phenomenon.

    I would like to take the time to ask if you would like to explain in one of your videos the Leslie Cube experiment?

    If you want to send to you from here one of my cubes that I made, contact me by email: [email protected] Thank you.

  82. michael montanari

    July 18, 2019 at 11:05 pm

    i presume the mug of your first coffee wasnt properly rinsed, so there was some soap residue left inside the cup after beeing washed


    August 2, 2019 at 6:21 am

    Can you help me in physics please?

  84. Feb Vel

    August 21, 2019 at 9:53 pm

    Shes so pretty tho…. ๐Ÿ˜

  85. vclamp

    August 23, 2019 at 4:10 pm

    What a nice video at the end of the day to help me decompress. ๐Ÿ˜›

  86. Jim's videos

    August 28, 2019 at 2:04 am

    Ok I'm late with this, but long hair and a gas stove is a recipe for… well, yeah.


    September 19, 2019 at 2:37 pm


  88. El dragรณn de saturno

    September 20, 2019 at 5:13 am

    te amo! ๐Ÿ™‚

  89. Justin Fanai

    September 24, 2019 at 5:01 pm

    I really really love it

  90. h y

    October 2, 2019 at 6:40 am


  91. Gulnaz Bee

    October 6, 2019 at 3:45 am

    1st and 2nd experiment is so interesting

  92. Mari Uchiha

    October 13, 2019 at 3:49 pm

    Could you explain in more detail why that happens?
    It is the first experiment.

  93. Hajara Abdul raheem

    October 13, 2019 at 5:19 pm

    Some experiments are repeating in some videos .. but anyway I love your unique explanation !!

  94. Goundo Fofana

    October 14, 2019 at 9:14 pm

    That was cool

  95. Ryan Kolenda

    October 21, 2019 at 4:15 am

    The surface tension water mason jar my teacher did it with a laminated card and no screen and it worked

  96. Joshua Thomas Macalintal Soliman Pietro Soliman

    November 3, 2019 at 5:09 pm


  97. Anil Kumar Sharma

    November 3, 2019 at 8:19 pm

    total energy
    total volume
    total height
    by capillarity action water, distilled๐Ÿ˜‹๐Ÿ˜‹

  98. ssozi parks

    November 8, 2019 at 10:14 am

    this so nice. we are talking about this in class

  99. Naman Srivastava

    November 10, 2019 at 5:41 pm

    Loved your experiments๐Ÿ’ฅ๐Ÿ’ฅ๐Ÿ‘๐Ÿ‘๐Ÿ‘

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