Small experiment: a toothpick that can swim

I successfully did a simple and interesting little experiment today, not to mention how happy I was.

The name of this little experiment is "a toothpick that can swim". Can toothpicks really swim? Really, listen to me slowly.

The tools I prepared are: a toothpick, shampoo and a basin of water. I put the shampoo at the end of the toothpick first, and then carefully put it in the basin. I stared at the toothpick carefully to see if it showed any signs of swimming forward. Many things happen. He finally started swimming. The shampoo will push the toothpick forward slowly like a propeller, just like a small fish swimming in the water!

Strange, why can toothpicks swim? I read this article carefully. It turns out that shampoo contains detergent "surfactant component", which weakens the surface tension of water. The tip of the toothpick moves because the tail of the toothpick is stained with shampoo, which reduces the tension of the surrounding water surface and pulls the toothpick as a whole. Snoring