Improved engine support. Addition of refractory glass cover improves heat retention. Recorded around midday, 10 February 2008 at 51.8 deg. N latitude. Solar elevation about 23 deg. above horizon. Final clip shows water heating.
Duration : 0:1:25
Real Goods ’solar guru’ John Schaeffer discusses how photovoltaic modules (solar panels) are made and why it is so important that we continue to develop solar technology. Learn more at http://www.realgoodssolar.com .
Duration : 0:0:43
http://www.greenpowerscience.com/
GREENPOWERSCIENCE WILL HAVE A TV SHOW SOON!
Duration : 0:7:46
Need a Science Fair Experiment?
Always wanting to try this, here are the results of my experiment.
For more on electricity old theories and new ones, visit:
http://amasci.com/miscon/whyhard1.html#cur for the answers.
You can do the same.
Note:. I used random parts and tried to keep the LED values low, with what I had on hand.
Transistors are like electronic (one way) valves.
The center leg controls the opening and closing or amplification of the valve. Using only that part of a PNP transistor, I devised my own diode for this experiment.
Transistors replaced vacuum tubes. They are used mostly 2 ways. To amplify the signal passing through, or to act as an “electronic switch”.
Current only goes through one way, and by increasing or decreasing the bias current on the center leg, you can control the flow though it.
In most cases, adding even higher voltage, increases the output, thus making it an amplifier.
Diodes allow electricity to go only one way, which makes a great gate.
DC electricity’s electrons always flow from Negative to Positive.
Same as Earth’s Negative electrons flying to a positive charge in the sky. AKA lightning.
Yes, it is a scientific fact. Ask Ben Franklin!.
Thanks for watching and keep using your heads.
Dave
Duration : 0:10:19
http://www.greenpowerscience.com/
FRESNEL LENS WWW.GREENPOWERSCIENCE.COM
Duration : 0:8:5
solar project,and air x 400 watt,,been workin on this for a couple of months,,this wouldnt be affordable if ebay wasnt around,,,,any comments let me know thanks and if i can answer any questions,,home owners ociation suck when it comes to solar!!!!!!!!
Duration : 0:4:11
February 11, 2009 lecture by Jefferson Tester for the Woods Energy Seminar (ENERGY301). In his talk “A Pathway for Widespread Utilization of Geothermal Energy–the Roles of Multi-scale Resource and Technology Research and Systems Analysis,” Tester talks about the benefits and challenges of harnessing geothermal energy, and he erts that it is a large resource that complements solar and wind energy and is both carbon free and scalable.
The Woods Energy Seminar is an interdisciplinary series of talks primarily by Stanford experts on a broad range of energy topics. Jefferson Tester is the David Croll Chair for Sustainable Energy Systems and ociate Director for the Cornell Center for a Sustainable Future in the School of Chemical and Biomolecular Engineering at Cornell University.
Woods Institute for the Environment
http://woods.stanford.edu/
Stanford Channel on YouTube:
http://www.youtube.com/stanford
Duration : 0:58:17
Solar-Powered Value - Interview with Mark Bachman of Pacific Crest Securities (Bloomberg News)
Duration : 0:4:6
Geothermal energy project for science
This is Kierstie’s geothermal science fair experiment.
