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Tuesday, October 3, 2023

Scientists have said what will happen if you freeze soap bubbles

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It is worth admitting that soap bubbles are one of the favorite pastimes of all children. But even adults can’t resist when it comes to experiments.

If you’ve ever seen viral videos of people blowing soap bubbles outside in winter on the internet, then you know how beautiful they look when frozen, The Grunge writes.

Surprisingly, these bubbles do not burst immediately and retain their original shape even when completely frozen. The science behind these bubbles also turned out to be quite fascinating.

When water freezes, it usually begins to solidify in the coldest place. In puddles, lakes, and other bodies of water, the freezing process begins at the top of the water and moves down. This freezing pattern is known as the “freeze front”.

As the scientists point out, soap bubbles don’t tend to follow this freezing front and produce some unique results.

When you freeze a soap bubble, the patterns you see are the result of the Marangoni effect. This effect is created by the surface tension of the balloon and causes the ice crystals to spin and move along the surface of the balloon until there is enough ice to freeze them in place. A crystallized pattern remains after complete freezing.

Unfortunately frozen bubbles are unstable, so they don’t last long. The beautiful patterns created by the Marangoni effect also lead to surface cracks. These cracks are absent while the bubble is still liquid and holding the air inside.

Cracks in frozen bubbles allow air to escape, causing the bubble to collapse. But don’t worry, frozen bubbles usually last long enough to be photographed.

Recall that Focus wrote earlier about why shells make noise. It turned out that the reason for the sound inside the shell was neither the movement of air currents nor the sound of blood vessels, namely the surrounding noise.

Source: Riafan

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