What is a Router and What is a Modem?
This is an easy-to-understand explanation of the computer term "router" in this video lesson. All modems have a place for either cable or a phone line, a USB port for the USB cord to connect to the computer. Routers have power connectors and USB connectors. Routers split the connections to multiple computers. (10:37)
Electromagnetic Induction
After Oersted's 1820 discovery that electric currents create magnetism, it was obvious that in some way magnetism should be able to create electric currents. The discovery of electromagnetic induction, in 1831, by Michael Faraday and Joseph Henry was one of the most important of the 19th century, not only scientifically, but also technologically, because it is the means
How Does an Electric Circuit Work?
An electric circuit works by using conductors to carry a current
from one place to another after a power supply gives energy to the
current. learn the difference between conductors and insulators, as well as what the best conductors are, with information from a science
teacher in this video.
What Is the Formula to Calculate Resistance?
The formula to calculate resistance is voltage, or potential
difference, divided by current equals resistance in ohms. Calculate the
resistance created by a power supply with instructions from a math and
science teacher in this free video on science formulas.
How to Build an Electrical Circuit in a Model House
A model house circuit is the same as the circuits that exist
in a real house, yet it contains a limited number of components. Build
an electrical circuit in a model house with a power supply and a switch
with help from a science teacher in this video.
Ancient Mysteries - The Puzzling Pyramids of Mexico 2/5
Planned and mapped out according to the stars and built over a series of sacred caves, at its height, Teotihuacán was the seventh largest city of the ancient world. Its power and influence was felt throughout Mexico. This documentary is suitable for high school students.
Ancient Mysteries - The Puzzling Pyramids of Mexico 3/5
Planned and mapped out according to the stars and built over a series of sacred caves, at its height, Teotihuacán was the seventh largest city of the ancient world. Its power and influence was felt throughout Mexico. This documentary is suitable for high school students.
Ancient Mysteries - The Puzzling Pyramids of Mexico 4/5
Planned and mapped out according to the stars and built over a series of sacred caves, at its height, Teotihuacán was the seventh largest city of the ancient world. Its power and influence was felt throughout Mexico. This documentary is suitable for high school students.
Ancient Mysteries - The Puzzling Pyramids of Mexico 5/5
Planned and mapped out according to the stars and built over a series of sacred caves, at its height, Teotihuacán was the seventh largest city of the ancient world. Its power and influence was felt throughout Mexico. This documentary is suitable for high school students.
Nebulae Part 1 of 5 John J. McCarthy Observatory, New Milford, CT. Monthly astronomy lecture done by Bob Lambert. Date of lecture is October 2008.   Lecture starts with explanation that we are now living in the Earth’s Secondary Atmosphere. There was a First Atmosphere called the primary atmosphere and it did not resemble today’s atmosphere at all. The evolution of our atmosphere is a continuum of an evolution, the atmosphere continues to chang
Nebulae Part 2 of 5 John J. McCarthy Observatory, New Milford, CT. Monthly astronomy lecture done by Bob Lambert. Date of this lecture is October 2008. Video starts with a discussion of where the first atmosphere came from. Then progresses into how long the primary atmosphere lasted and what happened next. Presenter shows pictures of early constant eruption of volcanoes and bombardments of comets. Further discusses the CO2 cycle, the e
Nebulae Part 3 of 5 John J. McCarthy Observatory, New Milford, CT. Monthly astronomy lecture. June 2008. Nebulae by Dr. Parker Moreland.  Presenter goes starts this episode with pictures of various nebulae. When a picture of a nebulae is shown the presenter gives an explanation of the nebulae and interesting things to look at. Presenter goes onto the World Wide Telescope to look at stars that are in the sky on the night of this presentation. The p
Nebulae Part 4 of 5
John J. McCarthy Observatory, New Milford, CT. Monthly astronomy lecture. June 2008. Nebulae by Dr. Parker Moreland.    This episode starts with the presenter being logged onto the World Wide Telescope. The presenter shows various nebulae that are located in the sky. Presenter talks about the nebulaes shown on the screen. This portion or telescope would be good for any age student. Presenter stands beside a screen that is a Power Point pr
Nebulae Part 5 of 5 John J. McCarthy Observatory, New Milford, CT. Monthly astronomy lecture. June 2008. Nebulae by Dr. Parker Moreland.  This episode starts with the presenter being logged onto the World Wide Telescope. The show that is shown discusses the star cluster Orion and the nebulae contained in the cluster. This portion or telescope would be good for any age student. Presenter stands beside a screen that is a Power Point presentation. Vi
Hoover Dam and Hydroelectric Power Plant Tour Part 1
This video is a series of video clips taken when visiting the Hoover Dam and Hydroelectric Power Plant back on December 28, 2008. Hoover Dam is located at Lake Mead at the Arizona and Nevada State line and just East of Las Vegas on US Highway 93. The highway goes over the dam, but a by pass bridge is being built across the Colorado River just down stream from the dam due to be completed in September of 2009. Video part 1 mainly shows the outside area of the dam as viewed from the visit
Super Structures of the World: Panama Canal
Deep in the jungles of Central America, man has battled nature to build an engineering marvel. Its epic story continues to astonish us! Its dimensions defy imagination! It’s the crossroads of the world’s economy.
Next Generation of Cheap Solar Cells
See a new technology which uses cheap materials - instead of expensive silicon crystals - to create powerful solar cells. These new cells are projected to cost 1/10th of what the more expensive silicon cells cost. See how a tiny solar panel - can create enormus usable wattage - and thus useful power. Run time 02:05.
SuperSpeed Video
SuperSpeed is a fluency game that helps kids read better, and enjoy it tremendously! Â In this video you will see an actual classroom in action playing this terrific game created by Power Teaching (also known as Whole Brain Teaching).
Biography: Albert Einstein
Biography of Albert Einstein. He was the twentieth century's greatest thinker. An immigrant who fled Nazi oppression and re-invented himself as a political idealist and humanitarian.
Cold War: Hungarian Revolution - part 5/5
1953 - 1961 Thaw is conceivable with Stalins death. Khrushchev outmaneuvers Malenkov for power and visits the West. Germans, Poles and Hungarians attempt to rise against Soviet rule. In 1956, an uprising in Hungary is ruthlessly crushed by Soviet tanks. The U.S., pledged to contain rather than overthrow communism, does nothing.
