Units are a major way we describe the world around us, and by looking at the scientists some of them are named after, we can get a sense of how we’ve learned so much about our universe.

In this video Paul Andersen explains how mass can be converted to energy and energy can be converted to mass. The equation E=mc2 can be used to determine the amount of energy released from nuclear processes.

Units are a major way we describe the world around us, and by looking at the scientists some of them are named after, we can get a sense of how we’ve learned so much about our universe.

Hank explains the power of solar energy and describes how it may fit into our diversified energy future.

We've talked about a lot of revolutions in 19th Century Europe, and today we're moving on to a less warlike revolution, the Industrial Revolution. You'll learn about the development of steam power and mechanization, and the labor and...

The concepts of work and power help us unlock and understand many of the physical laws that govern our universe. In this Lesson, Peter Bohacek explores the interplay of each concept when applied to two common objects---a lightbulb and a...

In this video Paul Andersen explains how the work is a product of the external force applied to an object or system and the distance it moves. Power is a measure of the amount of work done per unit time. The work can be calculated as...

Howcast - Learn about kickboxing champ Phil Nurse, one of Howast's UFC experts, in this video.

Howcast - Learn about the UFC from kickboxing champion Phil Nurse in this Howcast video.

Howcast - Learn about UFC fighter Rashad Evans from kickboxing champion Phil Nurse in this Howcast video.

Howcast - Learn about UFC fighter Wanderlei Silva from kickboxing champion Phil Nurse in this Howcast video.

Howcast - Learn how to become a UFC fighter from kickboxing champion Phil Nurse in this Howcast video.

Howcast - Learn about UFC fighter Randy Couture from kickboxing champion Phil Nurse in this Howcast video.

Howcast - Learn how to strike to the clinch during an attack from kickboxing champion Phil Nurse in this Howcast UFC training video.

Howcast - Learn how to handle a UFC weigh-in from kickboxing champion Phil Nurse in this Howcast video.

Howcast - Learn about the Thai Plum from kickboxing champion Phil Nurse in this Howcast UFC training video.

Howcast - Learn about stances from kickboxing champion Phil Nurse in this Howcast UFC training video.

Howcast - Learn about striking from kickboxing champion Phil Nurse in this Howcast UFC training video.

Howcast - Learn about same stance attacks from kickboxing champion Phil Nurse in this Howcast UFC training video.

Howcast - Learn how to wrap hands properly from kickboxing champion Phil Nurse in this Howcast UFC training video.

Howcast - Learn about UFC fighter Rampage Jackson from kickboxing champion Phil Nurse in this Howcast video.

Howcast - Learn how to throw a punch from kickboxing champion Phil Nurse in this Howcast UFC training video.

Howcast - Learn about UFC fighter Georges St-Pierre from kickboxing champion Phil Nurse in this Howcast video.

Howcast - Learn about UFC fighter Joe Jones from kickboxing champion Phil Nurse in this Howcast video.