How to harness Sun's energy by making a solar concentrator
How to harness Sun's energy by making a solar concentrator 75 rate or flag this page By greathub A solar reflector can be made very easily. The beauty of a parabolic reflector is that you can concentrate parallel rays of sun on a particular point. It can be used for various purposes. It has applications in solar cooking, pasteurization and even in air-conditioning(No, this is not a typo). The design I am presenting is very cost-effective.
Free and Easy DIY Parabolic Solar Concentrator Plan
How to make a really hot solar cooker
Greatest Engineering Achievements of the 29th Century
Welcome! How many of the 20th century's greatest engineering achievements will you use today? A car? Computer? Telephone? Explore our list of the top 20 achievements and learn how engineering shaped a century and changed the world.
The Lemelson Center
The Study of Invention and Innovation
A Science Odyssey: People and Discoveries:
A databank consisting of 120 entries about 20th century scientists and their stories.
Free Safety Kit
Keeping your child safe is the most important part of your life. Polly Klaas can help you get some peace of mind by preparing a free Child ID Kit in case anything ever happens. You hope, plan, and work hard for the best, but should also be prepared for the worst. In the event of an emergency, having some key information at the ready can make all the difference. Our free Child ID Kit allows you to collect and store all of your child's vital information in one place, including fingerprints and DNA, just in case you ever need it. cfc Best in America 3The Child ID Kit also includes 24 pages of guidance for parents, helping you build your child's self-confidence by teaching them how to stay safe at all times. Specialized, no-scare methods are included for each age group.
Kids and Computers
Geared to sell their product to teach young children to program. Scroll down the page & you will find useful information on computers for beginners
Dissect a disk
Excellent activity for the kinesthetic learner. Make sure your good disks are locked away before starting this one!
MicroWorlds for Munchkins
Since the 1960s, Logo was intended to have no threshold and no ceiling. It derives its magic from how little kids and graduate students find the same environment challenging, exciting and expressive. Although a variety of forces have conspired to make MicroWorlds use most common in years five through seven, little kids can use it in quite creative ways. Much has been written about how MicroWorlds can be used to enhance the learning of secondary school concepts. This column makes the case for using MicroWorlds in the lower primary grades.