4 way traffic light circuit

Here’s one way of making sure the traffic light is always “green”: a team of researchers at the University of Nebraska-Lincoln is working on a three-year green energy project that would use wind and solar energy to power street and traffic lights, while integrating excess electricity into the municipal power grid.

Last year, a small wind …

… United States actually runs entirely off of wind power.

Rural Rock Port, Missouri uses 4 wind turbines to produce all of the city’s electrical power. The turbines now power every computer, every appliance and every light in town, even the only traffic light on Main Street, making this city of 1,300 the first and only in the nation to run completely on wind power.

The wind turbines are projected to produce 16 million kilowatt hours of electricity every year, which is actually 3 million kilowatt hours more than the city expects to need.

The company that contracted with the city to build and install the turbines expect that the electrical output …

… of energy can be used to do work.

Electrical energy is of limited use to us unless we have ways to convert it to beneficial forms of energy. Household appliances are devices that convert electrical energy to useful energy. The electrical energy might have been produced by heat, light, nuclear, chemical, or mechanical energy.

Chemical energy can be used to produce electrical energy by using the wet cell, dry cell, and storage battery. Chemical energy is stored in molecules of matter. Chemical energy is stored energy that is given off when some molecules of matter react with each other. The wet cell, dry cell, and storage battery are examples of stored chemical energy. …