In this video Paul Andersen explains how magnetic domains act as tiny magnets within ferromagnetic material.

Mr. Andersen gives a brief description of osmosis. He explains how water moves from a hypotonic to a hypertonic solution across a semipermeable membrane. The video ends with a time-lapse demon in class.

Bad tidings - the tides are slowing down the earth!

The drafting and adoption of the United States Constitution recalled many of the high ideals of liberty and freedom that were espoused during the Revolutionary War. But the compromises that were made to get all of the new states on board...

In this video Paul Andersen explains how the macroscopic measure of temperature can be related to the average kinetic energy of molecules in motion. The Boltzmann constant and distribution can be used to calculate the root mean square...

SciShow Space takes you on a tour of Venus, a world with such an extreme environment that you might call it "Earth's evil twin."

In this video Paul Andersen explains how equipotential lines show equal electric potential in an electric field. Equipotential lines can be created from scalar values or by observing the electric field lines. An charged object can move...

Paul Andersen explains how organisms regulate their internal osmolarity or not. He starts with a brief description of osmosis and why it is important for animal cell to be surrounded by an isotonic solution. He then explains how...

In our last episode, Sabrina talked about how Engineers define the problems they need to solve. But how do you know when you've actually solved a problem? What do you expect to happen that would equal success? In this episode, Sabrina...

In the video Paul Andersen explains how Bernoulli's Equation describes the conservation of energy in a fluid. The equation describes the pressure energy, potential energy, and kinetic energy of a fluid at a single point. A sample...

In this video Paul Andersen explains how traveling waves move through space and time. The reflection and interference of traveling waves can create standing waves which appear motionless. Examples of traveling waves in one and two...

I'm scared of spiders. I'm not afraid to admit it. I love them in a scientific sense, or from a "let me look at you from way over here" sense, but that's as close as I get. Here's a look at the science of why some of us are afraid of...

Plants don’t have brains or muscles, and yet some of them can perform such feats as eating insects or following the sun. Scientists haven’t completely figured out how this happens, but they do have some pretty strong leads.

In this video Paul Andersen explains how the continuity equation is an application of conservation of matter in a fluid. The continuity equation may apply to either mass or volumetric flow. Example problem and examples are included.

If you were to orbit the Earth, you'd experience the feeling of free fall, not unlike what your stomach feels before a big dive on a roller coaster. With a little help from Sir Isaac Newton, Matt J. Carlson explains the basic forces...

Have you experienced embarrassing voice cracking? Most people have, and there’s a lot of reasons why you might be affected. From illness, stress, and good old puberty.

In this video Paul Andersen explains how ray diagrams for lenses can be used to determine the size and location of a refracted image. Images may be either real or virtual images. Ray diagrams for converging and diverging lenses are...

A few weeks ago we started an experiment where we planted some seeds to see how they would grow! Today we get to check out our results!

Because of space physics, one faraway asteroid is likely the progenitor of almost a third of all the meteorites on Earth.

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Mr. Andersen talks you through the diffusion demo. After you finish watching this video you should be able to rank the following from smallest to largest: starch, glucose, water, IKI and the pores in the dialysis tubing.

Paul Andersen explains how catalysts can speed up a reaction without being consumed in the reaction. Catalysts can lower the activation energy of reaction be stabilizing the transition state. They can also create new reaction pathways...

This video is about why words flip left & right (aka horizontally) in a mirror but not up & down (aka vertically). The answer has to do with specular reflection, mirrors being like windows into another world (alternate...

You're the chief advisor to an eccentric king who needs to declare his successor. He wants his heir to be good at arithmetic, lucky, and above all else, honest. So he's devised a competition to test his children, and ordered you to...

Why does ice float? You might not think about it, but this special property of frozen water is what makes your iced tea tinkle and makes a lot of aquatic life possible. Hank gets in touch with his inner Olaf to explain the wonder that is...