Why do humans cook? Holidays are celebrated in many ways, but chances are they involve eating, and eating a LOT. Ever wonder why we cook our food? We do it because it tastes good, of course, and because our customs and traditions are...

Today Hank brings us the news of a unique astronomical discovery - a rogue planet. He also allays our fears of an apocalyptic collision with Earth. So, this new planet is awesome, but it needs a different name - CFBDSIR...

Is Glass a Liquid?

Activism is a tough job, especially for young people yearning for immediate change -- something climate activist Melati Wijsen has learned over ten years of pushing for environmental protection, starting at age 12 in her home on the...

The word "mole" suggests a small, furry burrowing animal to many. But in this lesson, we look at the concept of the mole in chemistry. Learn the incredible magnitude of the mole--and how something so big can help us calculate the tiniest...

Mr. Andersen explains the difference between physical and chemical changes. A brief discussion of chemical reactions and equations is also included.

In this video Paul Andersen explains how intermolecular forces differ from intramolecular forces. He then explains how differences in these forces account for different properties in solid, liquids and gases. Some of these properties...

In this video Paul Andersen explains the first step in the design process, defining and delimiting the engineering problem. Design requires a clear definition of the problem and this is done by addressing both the constraints and...

In today's episode, Phil looks at how gravity plays out across the universe.

When they're used well, graphs can help us intuitively grasp complex data. But as visual software has enabled more usage of graphs throughout all media, it has also made them easier to use in a careless or dishonest way - and as it turns...

A Simple Proof of Conservation of Energy

How does climate change? And what happens to environments and ecosystems when it does? In this episode of Crash Course Kids, Sabrina shows us the effects that climate change can have and how one small change in an ecosystem can throw...

New ReviewLearn Bernoulli’s Principle with a straw and a ping pong ball. A fun and simple physics demo to see pressure differences in action!

New ReviewIn this YouTube Shorts math video, we quickly show how to simplify a radical expression and write it in simplest form. We will review why simplifying requires rationalizing the denominator using the conjugate to create a difference of...

New ReviewIn this math video we will simplify a polynomial expression by using the difference of squares property.

New ReviewWe want to be effective and efficient. But, aren’t they really the same? No. There is a difference, and it won’t take long to explain!

New ReviewOrganizational Change and Business Transformation are terms Project Managers encounter a lot. And it can be tricky to distinguish between what we mean by change and transformation. Let’s have a go.

New ReviewPERT and CPM are two forms of Network Chart that are represented differently, and take different approaches to calculating schedules. For both, the roots lie in the 1940s and the way the Manhattan Project was planned.

New ReviewIn this video I will show you how to factor a quadratic in your head when a is not equal to 1

New ReviewHow many times can you factor a polynomial? In this video I will show you how we factor this polynomial three times and we don't expand.

New ReviewIn this video I am going to detail the factoring must knows to understand how to factor quickly and effectively

New ReviewIn this video, I demonstrate how to factor a quadratic equation with large numbers, specifically (3n^2) - 2n = 645. We'll break down the 645 number and apply various factoring techniques to solve this equation. This will help you...

There's been a lot about vaccines in the news, recently, especially the flu vaccine. So we're going to concentrate on that, in today's Healthcare Triage News.

Can you blow a ping pong ball out of a funnel? Learn how Bernoulli’s Principle explains why you can't—demonstrated clearly and simply by Mr. P from Flipping Physics.