In this video Paul Andersen defines the rate of a reaction as the number of reactants that are consumed during a given period of time. The rate of the reaction can be affected by the type of reaction as well as the concentration,...

You may know it as a miracle powder or an ice cream flavor, but activated charcoal can do some pretty cool stuff.

In this video Paul Andersen explains how electrochemical reactions can separate the reduction and oxidation portions of a redox reactions to generate (or consume) electricity. The half reactions can be analyzed to determine the...

In this video Paul Andersen explains how electromagnetic induction occurs when the magnetic flux of an object changes. The magnetic flux is product of the surface area perpendicular to the magnetic field and the magnetic field strength....

Why is there a hexagonal structure in honeycombs? Why not squares? Or asymmetrical blobby shapes? In 36 B.C., the Roman scholar Marcus Terentius Varro wrote about two of the leading theories of the day. First: bees have six legs, so they...

When James, our master of microscopes, was looking through samples he’d received from Spain, he didn’t expect to see this—a creature straight out of a horror movie, with dark reddish brown eyes and tentacles streaming out of its...

Learn how to calculate pressure and density in fluids, understand why pressure increases with depth, and explore the difference between absolute and gauge pressure through real-world physics applications.

A video entitled "Find Surface Area: Cylinder" which shows how to calculate the surface area of a cylinder using the formulas for area of a circle and area of a rectangle.

What causes the rate of reaction.

Why are cells small in size

In a poll of the 50 of the most respected scientists, only one man was on every list at or near the top - Greatest scientist of all time. The birth of physics starts: Isaac Newton had many...

We have 3D + 1D of time. Why aren’t there 4 dimensions or 2 dimensions? Can life exist in the 4th dimension? Is there something special about three dimensions that makes life possible? This is the question that But...

Hawking radiation,Black-Hole Evaporation and black hole explosions! Stephen Hawking theorized that a black hole may not be so black. He showed that when you apply the laws of quantum mechanics to classical physics,...

Holographic Universe? Are we living on a hologram? Or inside a black hole? Our perception is that we live in a three dimensional world. What if our three dimensions, can be equally represented on a two...

Howcast - Learn how to do the b-boy power move called the Cali whip backspin in this Howcast breakdancing tutorial with choreographer Victor "Kid Glyde" Alicea.

Howcast - Learn the difference between a square subwoofer, a triangular subwoofer, and a round subwoofer in this Howcast car stereo video with expert Movin On.

Howcast - Learn how to prepare chicken for the grill from Pork Barrel BBQ pitmasters Heath Hall and Brett Thompson in this Howcast video.

Howcast - Learn how to make roses last longer in a floral arrangement from floral designer Sarah Brysk Cohen in this DIY wedding flowers video from Howcast.

Howcast - Learn how to prepare flowers for a floral arrangement from floral designer Sarah Brysk Cohen in this DIY wedding flowers video from Howcast.

Howcast -Learn how to choose a pole from pole dancing instructor Mai Yee in this Howcast video.

Learn which hits harder -- one 12" subwoofer or two 10" subwoofers -- in this Howcast car stereo video with expert Movin' On.

Pupil outcome: I can efficiently calculate the surface area of a cylinder. Key learning points: - Drawing the net of a cylinder helps deduce the formula for the surface area. - The formula can be used to find the surface area of any...

Pupil outcome: I can efficiently calculate the surface area of cubes and cuboids. Key learning points: - The surface area of a solid is the sum of the area of all the faces. - The net of a cuboid can help find the surface area. - The...

Pupil outcome: I can calculate the surface area of a frustum of a cone. Key learning points: - The frustum of a cone can be thought of as a cone with the top missing. - Calculating the surface area for the frustum of a cone is a similar...