Dtube Vlog: Learning the Surface Tension with a Magic Touch!

in #steemiteducation5 years ago (edited)


Greetings everyone,

Hi! We are back with another home experiment, this time exploring the magic of surface tension. I have been wanting to try this experiment called the Magic milk, which you can type onto google and also a YouTube, many results will be found.

So we did a two-part experiment again today, one to investigate the surface tension of the milk, and another to investigate the surface tension of the water.

The First Experiment on Milk

The fat molecules from the milk were dissolved, hence the soap actually reduced the surface tension of the milk. The soap broke down the fat of milk, causing like a swirling turbulence because there was a rapid movement that mixed the fat of the milk and the soap.

The Second Experiment on the Water

Soap molecule has 2 parts: 1 part of it is attracted to water, which is called the hydrophillic part and the other part would want to stay away from the water molecule, the hydrophobic part. That's why the herbs / black pepper scattered. It is also the principle of how soap can remove dirt from our dishes.

In both experiments, the MAGIC TOUCH is the soap detergent, if you haven't noticed. Surface tension is defined easily by this:

In physics, surface tension is a force present within the surface layer of a liquid that causes the layer to behave as an elastic sheet. It is the force that supports insects that walk on water, for example.

Surface tension is caused by the attraction between the molecules of the liquid. In the bulk of the liquid each molecule is pulled equally in all directions by neighbouring molecules, resulting in a net force of zero. At the surface of the liquid, the molecules are pulled inwards by other molecules deeper inside the liquid, but there are no liquid molecules on the outside to balance these forces, so the surface molecules are subject to a net inward force. There may be a small outward attraction caused by air molecules, but air is much less dense than the liquid, so this force is negligible. Source

Hope you learnt a bit more about surface tension today. For the next experiment, we want to investigate on sound! Do you think we can see sound? Hahaha! More accurately will be, we can see the effect of sounds.

Thank you very much for watching and I want to hereby wish those who are celebrating Deepavali a happy Deepavali!!!


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wow, cool experiment.. thanks for sharing us. really pro at dtube already. hahha

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This is indeed a very interesting experiment, not only it helps children understands chemistry through visualisation, it helps makes the experience fun.

And to make things even more interesting... this is what I found in Quora for the soap molecule, which you have mentioned , where you have the Hydrophilic head, plus the Hydrophobic tail. I wonder what @littledrummerboy's first reaction when he sees this?


Source

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This is a good image for explanation! Thanks for sharing this @littlenewthings :)

Another super awesome experiment again, oh I wish Jayden was there too. Lol.

Happy Diwali hehe. We know we don't celebrate just for greeting purpose. 😁

This is such a cool experiment!! Amazing how the colors swirl in the milk when the fat molecules get disrupted. Thanks for doing this experiment! @littledrummerboy is a cute little scientist!

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