In this video Paul Andersen explains how diffraction can be affected by the size of the wavelength. When waves pass through an opening or move around an obstacle a shadow region is created. The size of the shadow zone will decrease as...

In this video Paul Andersen details the waves in electromagnetic radiation. There is an inverse relation between the wavelength and frequency of electromagnetic waves. Electromagnetic radiation includes gamma rays, x-rays, infrared...

Gases are everywhere, and this is good news and bad news for chemists. The good news: when they are behaving themselves, it's extremely easy to describe their behavior theoretically, experimentally and mathematically. The bad...

Have you ever heard of a Perpetual Motion Machine? More to the point, have you ever heard of why Perpetual Motion Machines are impossible? One of the reasons is because of the first law of thermodynamics! In this episode of Crash Course...

In which Adriene Hill and Jacob Clifford teach you about one of the fundamental economic ideas, supply and demand. What is supply and demand? Well, you'll have to watch the video to really understand it, but it's kind of important for...

In this video Paul Andersen shows how carbon dioxide in the atmosphere is causing a decrease in the pH of the oceans. The carbon dioxide combines with the water to create carbonic acid which dissociates into bicarbonate and carbonate...

In this math lesson, we’ll learn how to represent a percent of decrease as an algebraic expression using a real-world scenario — the depreciation of a computer over time.
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After collecting all the data, you will learn to eliminate the text that we do not want to use in the chatbot project through an elimination process.

A video entitled "Interpret Exponential Features" that covers the shapes of exponential curves with different base values.

Howcast - Learn about the male sex drive from sex therapist Dr. Megan Fleming in this Howcast video about the psychology of sex.

Howcast - Learn about the connection between hormones and seizures from Steve Wolf, MD and Patty McGoldrick, NP in this Howcast video.

Howcast - Learn how to treat someone for shock in this first aid video from Howcast with Nurse Mary.

Howcast - Learn how deep tissue massage can break up scar tissue from celebrity massage therapist Meagan Holub in this Howcast video.

Howcast - Learn how to train for a 5K run from competitive runners Doug Oldiges and Stephanie Coburn in this Howcast video.

Howcast - Learn how to do an ssk aka left-leaning decrease in this knitting tutorial from Howcast.

Howcast - Learn how to do a k2tog aka right-leaning decrease in this knitting tutorial from Howcast.

Howcast - Learn how to decrease in purling in this knitting tutorial from Howcast.

Howcast - Learn how to do a gathered stitch in this knitting tutorial from Howcast.

Howcast - Learn which cancers you have a higher risk of developing if you are obese in this Howcast video.

Howcast - Learn how to prevent heart disease with the Mediterranean diet from Dr. Dennis Finkielstein in this Howcast video.

Howcast - Learn how to decrease on circular needles from circular knitting expert Jessica Kaufman in this Howcast video.

Howcast -Learn if you should get your cat spayed or neutered from board-certified veterinary behaviorist Dr. E'Lise Christensen, DVM in this Howcast video.

Howcast -Learn what hard drive sizes are supported by the PS4 from expert gamer Rob Pimentel in this Howcast video.

Howcast - Learn how to crochet a scarf from Lion Brand Yarn's Andrea Lemire in this Howcast video.