Editing Non-Newtonian fluid (section)

===Oobleck===
[[File:UniversumUNAM55 (cropped).JPG|thumb|Demonstration of a non-Newtonian fluid at [[Universum (UNAM)|Universum]] in Mexico City]]
[[File:Corn speaker.jpg|thumb|right|Oobleck on a subwoofer. Applying force to oobleck, by sound waves in this case, makes the non-Newtonian fluid thicken.<ref>This demonstration of oobleck is a popular subject for YouTube videos.{{which|date=March 2021}}</ref>]]
An inexpensive, [[Toxicity|non-toxic]] example of a non-Newtonian fluid is a suspension of [[starch]] (e.g., cornstarch/cornflour) in water, sometimes called "oobleck", "ooze", or "magic mud" (1 part of water to 1.5–2 parts of corn starch).<ref name="Oobleck: The Dr. Seuss Science Experiment">{{cite web|url=http://www.instructables.com/id/Oobleck/|title=Oobleck: The Dr. Seuss Science Experiment|website=instructables.com}}</ref><ref name="Outrageous Ooze">{{cite web|url=http://www.exploratorium.edu/science_explorer/ooze.html|title=Outrageous Ooze|website=Exploratorium|date=7 March 2023 }}</ref><ref name="Magic Mud and Other Great Experiments">{{cite book|chapter-url=https://books.google.com/books?id=v4qow8T1qsYC&pg=PA235|pages=235–236|title=The Complete Home Learning Source Book|last=Rupp|first=Rebecca|chapter=Magic Mud and Other Great Experiments|year=1998|publisher=Three Rivers Press |isbn=978-0-609-80109-3}}</ref> The name "oobleck" is derived from the [[Dr. Seuss]] book ''[[Bartholomew and the Oobleck]]''.<ref name="Oobleck: The Dr. Seuss Science Experiment"/>

Because of its [[dilatant]] properties, oobleck is often used in demonstrations that exhibit its unusual behavior. A person may walk on a large tub of oobleck without sinking due to its [[shear thickening]] properties, as long as the individual moves quickly enough to provide enough force with each step to cause the thickening. Also, if oobleck is placed on a large subwoofer driven at a sufficiently high volume, it will thicken and form [[standing wave]]s in response to low frequency sound waves from the speaker. If a person were to punch or hit oobleck, it would thicken and act like a solid. After the blow, the oobleck will go back to its thin liquid-like state.