The Solution to the Windmill Paradox. This video is about the tradeoff of Windmills: the fact that the more kinetic energy you extract from the wind the slower the wind goes, the less wind you have to extract energy from, etc. How much...

This video is about how physics dictates the design of modern windmills - why they are so big, have so few blades, and have such skinny blades.

Problem 2 from the 2011 IMO

Problem 2 from the 2011 IMO

When he was just 14 years old, Malawian inventor William Kamkwamba built his family an electricity-generating windmill from spare parts, working from rough plans he found in a library book.

Software developer Mike Matas demos the first full-length interactive book for the iPad -- with clever, swipeable video and graphics and some very cool data visualizations to play with. The book is "Our Choice," Al Gore's sequel to "An...

Wind is an ever increasing source of power worldwide, which means wind farms continue to be constructed. And choosing where to place those farms seems straightforward, but it might not actually be best to place the in the windiest places!

At age 14, in poverty and famine, a Malawian boy built a windmill to power his family's home. Now at 22, William Kamkwamba, who speaks at TED, here, for the second time, shares in his own words the moving tale of invention that changed...

Howcast - A staple break-dancing move, learn the Windmill to transition into even more difficult dance techniques.

Howcast - Learn how to do the bboy dance move known as the windmill in this Howcast breakdancing tutorial with choreographer Victor "Kid Glyde" Alicea.

Howcast - Learn how to freestyle your b-boy dance moves in this Howcast breakdancing tutorial with choreographer Victor "Kid Glyde" Alicea.

Skoop loves cooking. He's baking delicious cookies today. Eggs, flour, salt… Skoop's run out of flour, and there's no way to make the cookie dough without it. But there's no flour in the shop either. Leo and Lea collect from the field....

Find out how wind turbines transform kinetic energy into electricity.
<

br/>

People and places - Future of energy - The


energy debate />

Learning Points
Wind
p

ower is a renewable energy...

In this video, you will learn how to extend the 3D water mill that you created in the previous video. You will also learn how to create custom attachments for the mill, such as gears and cogs.
<
br/>
This clip is from the chapter...

Dr. Forrester explains the production of electricity and materials used to insulate and conduct it.

Maggie is determined to make her own bread by getting the windmill working again but JG’s drone soon puts a spanner in the works.

A wheel that spins forever; a bird that never quenches its thirst; a clock that never stops ticking, an endless source of free energy. These are but the dreams of inventors striving to make perpetual motion machines, machines that can...

CISSP Domain 3: System Architecture and Engineering: Industrial Control Systems
r/>
This clip is from the chapter "CISSP Domain 3: System Architecture and Engineering" of the series "CISSP® Certification Domain 3: Security...

Learn how some artists use a combination of negative space, light, and dimension to create compelling optical illusions.

This video is answering the question of what do wind turbines do.

The animals suffer through another winter, hungrier and more exhausted than ever. However, the pigs are growing fat and multiplying in number. When the farm’s most dedicated comrade falls ill, the animals desperately call on the pigs to...

The animals toil through a bitter winter to rebuild their ruined windmill - it’s a matter of honour! When a food shortage threatens the farm, Napoleon strikes a trade deal with the humans. How will the hens react to their harsh new...

Global warming is something that threatens to impact us all: both environmentally (with the loss of natural marvels such as the great barrier reef) and economically.



But humans aren't actually contributing as...

The windmill is one eighth kilometres tall, while the empire state building is three times as tall as the windmill. What is the difference in their height in kilometres?