In 1967, researchers gathered to answer a long-running scientific question: just how long is a second? It might seem obvious at first. A second is the tick of a clock, the swing of a pendulum, the time it takes to count to one. But how...

A unit is the frequently arbitrary designation we have given to something to convey a definite magnitude of a physical quantity and every quantity can be expressed in terms of the seven base units that are contained in the...

You might be benefiting from the weird units you've never heard every time you put on your shoes or read about dark matter.

Mr. Andersen shows you how to interpret a position vs. time graph for an object with constant velocity. The slope of the line is used to find the velocity. A phet simulation is also included.

Imagine aliens land on Earth a million years from now. What will these curious searchers find of us? They will find what geologists, scientists, and other experts are increasingly calling the Anthropocene, or new age of mankind. David...

In order to have a meaningful conversation about the dangers of radiation exposure, it’s important to be clear about just how much radiation we are dealing with. Unfortunately, the units we use are kind of a mess… but SciShow is here...

We don't live in a perfect world, and neither do gases - it would be great if their particles always fulfilled the assumptions of the ideal gas law, and we could use PV=nRT to get the right answer every time. Unfortunately, the ideal gas...

Paul Andersen previews the information in the genetics unit. He defines the central dogma of biology and explains how DNA creates an RNA transcript that is used to translate proteins. He differentiates between mitosis and meiosis. He...

All life on Earth— living and inanimate, microscopic and cosmic— is governed by mathematical laws with apparently arbitrary constants. And this opens up a question: If the universe is completely governed by these laws, couldn't a...

Paul Andersen reviews the major components of the homeostasis. He explains how organisms respond to abiotic and biotic factors in their environment with feedback loops. He shows how responses can be behavioral or physiological.

Did you know that, at a certain point on a moving wheel... there's no motion? I mean, kinda... it's all relative, right? Prepare to have your mind blown in this episode of Crash Course Physics where Shini delves into the world of...

There is more than one way to measure the same thing! Jessi and her friend The Giant Squidstravaganza (Squid for short) explore the differences between the Metric System and the Imperial System.

Despite two decades of sweeping economic change, China is still a Communist state. While free enterprise now flourishes in a rapidly growing private sector, China is a one-party country with a government that is radically enmeshed with...

In this video, we will work on assignment 1 solution for cover type repository.

In this video, we will cover UnitOfWork in action.

In this video, you will learn how to implement unit of work. Unit of Work is like a business transaction.

A video entitled "Unit Rates" that covers the process of converting units to find real-world quantities.

Howcast - Electric garage doors are a great convenience -- until, of course, they break. The bad news: a dozen things could be to blame. The good news: many are easy to fix yourself.

Howcast - Learn about robotic hair transplants from hair transplant surgeon Craig Ziering, MD in this Howcast video.

Howcast - A handheld GPS device offers the technology to navigate to exactly where you need to go and gives you the fastest way to get there. Never again will you wonder where you are.

Howcast - Learn about the possible side effects of an IUD in this Howcast video about birth control.

Howcast - Check out part 60 and rescue the Migrant Civilian Fleet by disabling the Geth Dreadnought in this walkthrough of Bioware's new release, Mass Effect 3.

Howcast - Learn how to make an origami kusudama with this origami video from Howcast.

Howcast - Check out part 68 and go down to the Quarian homeworld, Rannoch, and destroy the Reaper Base in this walkthrough of Mass Effect 3.