11/12/2023 0 Comments Science definition of viscosity![]() The time that a cat spends to fill a sink is about 5 seconds, and we observe this phenomenon for about 60 seconds. Therefore, De < 1, and the Himalayas are liquid (and they are actually moving imperceptibly because of the continental drift).Īn example of using this model to prove that cats are liquid, according to Fardin’s research, is: If it is measured on the Geological Time Scale, T is equal to billions of years, and τ is equal to tens of millions of years. If the resulting “De” is more than 1 (>1), then the material is relatively solid if the result is lower than 1 (<1), the material is relatively liquid.įor instance, the Himalayas are solid from the observation of human eyes, but this characteristic is measured based on the human time scales. “De” is called the Deborah number, obtained through dividing the relaxation time ( τ ) by the experimental time ( T ). In this mathematical formula shown below, The determination of an object’s physical state is not only up to what we see, but also due to comparing two time periods: the relaxation time, which is the time elapsed due to the deformation of an object, and the experimental time, which is the time spent to observe an object. Proof: Using the Deborah Number and the Properties of Liquids Fardin discovered that cats, who are known to be solid most of the time, can be classified as liquid under certain circumstances. It is a material that takes up the shape of the container that holds it. Sometimes you just can’t get the ketchup out of the bottle, but after you shake it, it becomes runnier and therefore easily gets out.Ī liquid, as we have learned in high school science classes, has a fixed volume, yet does not have a defined shape. ![]() Two common examples of this type of liquid are ketchup and toothpaste. They do not follow Newton’s law of viscosity (its name gives it all up, right?), known as constant viscosity independent of stress. ![]() Non-Newtonian liquids are often studied in rheology because of their special properties compared to other common liquids. This word originated from the Greek word for “flow” and it was created by Eugene Bingham, the founder of the Society of Rheology in the USA. In order words, it is the study of the reactions that different materials have, especially fluids, to a force. Rheology is the science of the deformation of materials. In this paper, he successfully proved that cats, in fact, are liquid.īut hold on! Before diving into his work, we need to know what rheology is. In 2017, a young French physicist named Marc-Antoine Fardin strode confidently onto the stage at the Sanders Theater of Harvard University and started presenting his published paper, “On the Rheology of Cats”. Some of the winners have even changed the world with their discoveries or inventions while continuing their research on the topic after winning the Ig Nobel. The presentations of the winners always make people laugh out loud, but behind each of them, serious scientific provings and facts support the research done. Every year, scientists gather at Harvard University to honor the winners with a flamboyant ceremony. The Ignoble Nobel Prize was created in 1991 by Marc Abrahams, aiming to celebrate scientific discoveries or inventions that make people laugh, then reflect. In this series, we will explore the famous Ignoble Nobel Prize (abbreviated as “ Ig Nobel”) and share some interesting research done by the winners. Did you know that there exists an amusing prize for the funniest scientists and their comical findings?
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