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Saturday, March 23, 2019

Experiments :: essays research papers

&61553 newspaper &61553 measuring cups &61553 1 cup of dry cornflour &61553 large bowl or pan &61553 food coloring (if you want) &61553 1/2 cup of body of piddlePut newspaper down on your counter or tabletop. Put the cornstarch into the bowl. Add a write down or two of food coloring. (Use whatever colors you like.) Add water slowly, mixing the cornstarch and water with your fingers until all the powder is wet. Keep adding water until the max feels like a liquid when youre mixing it slowly. Then get a line tapping on the surface with your finger or a spoon. When Ooze is besides right, it wont splash--it exit feel solid. If you Ooze is too powdery, add a little(a) more water. If its too wet, add more cornstarch. Play around with your Ooze Pick up a s reckoning and squeeze it. Stop clinch and it will drip through your fingers. Rest your fingers on the surface of the Ooze. allow them sink down to the bottom of the bowl. Then try to pull them surface fast. What happens? Take a blob and roll it between your hands to apply a ball. Then stop rolling. The Ooze will trickle away between your fingers. Put a small plastic toy on the surface. Does it stay there or does it sink? Ketchup, like Ooze, is a non-Newtonian fluid. Physicists posit that the best way to get tomato ketchup to flow is to turn the feeding bottle over and be patient. Smacking the bottom of the bottle actually slows the ketchup downWhy does my Ooze act like that?Your Ooze is make up of tiny, solid particles of cornstarch suspended in water. Chemists call this font of mixture a colloid. As you found out when you experimented with your Ooze, this colloid behaves strangely. When you bang on it with a spoon or quickly squeeze a handful of Ooze, it freezes in place, acting like a solid. The harder you push, the thicker the Ooze becomes. But when you spread your hand and let your Ooze ooze, it drips like a liquid. Try to fight the Ooze quickly with a finger, and it will resist your movement . Stir it slowly, and it will flow around your finger easily. Most liquids dont act like that. If you urge a cup of water with your finger, the water moves out of the way easily--and it doesnt matter whether you stir it quickly or slowly.

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