Motivate Repulsive Grapes with Neodymium Magnets

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Neodymium magnets are powerful enough to demonstrate the subtle effects of diamagnetism, the weak repulsion that magnets can exert on some substances. What is Diamagnetic Repulsion? Magnetism is an attractive force that sticks a fridge magnet onto a refrigerator. However, “like” magnetic poles repel; the “North” ends of two magnets push each other apart. These […]

Variations on the Coffee Ring Home Lab Experiment

"Coffee Bean in a Coffee Ring" by matt.davis

Anyone who washes a cup after coffee dried in it has seen a “coffee ring”. Is the ring caused by the cup’s convex bottom? Several experiments get to the bottom of this phenomenon. Introducing the Coffee Ring Home Lab Experiment This is a simple lab experiment, both safe and interesting for anyone. More accurately, it […]

The Leidenfrost Effect is a Simple Home Science Experiment

"Image of Leidenfrost Equipment" by Mike DeHaan

The Leidenfrost Effect is also known as “film boiling.” This one effect makes water dance on a frying pan, flow uphill, and protects a sausage from burning in hot lead! Public Safety Message for Testing the Leidenfrost Effect The Leidenfrost Effect deals with steam and heat. These experiments involve hot objects. Carelessness can lead to […]

Non-Newtonian Fluid: How to Make Goo at Home

Hydroclustering in non-Newtonian fluid: Image by VinnieOtin

What’s Non-Newtonian Fluid? Imagine a similar concept to quicksand…. It’s liquid, yet also solid due to suspended particles. In other words, it’s goo. Viscosity of fluids Sir Isaac Newton stated that viscosity, or how resistant a fluid is to flow, depends on the amount of heat applied. A non-Newtonian fluid, such as quicksand, or the […]