Greenland Essays - Geography Of Greenland, Greenland, Free Essays

Greenland Essays - Geography Of Greenland, Greenland, Free Essays Greenland Greenland The geography of Greenland is quite ironic considering its name. Greenland is Located in the northern part of North America. It is between the Arctic Ocean and the North Atlantic Ocean, northeast of Canada. Greenlands area is approximately 2,715,600 square kilometers. Its area is slightly more than 3 times the size of Texas. It is the largest island in the world. It is also primarily by the Davis Strait and Baffin Bay and from Iceland on the east, by the Denmark Strait. Greenlands terrain is flat to a gradually sloping icecap. It covers everything but a narrow, mountainous, rocky coast. Its climate has cool summers and very cold winters! During the summertime in the southern part of Greenland, the average Temperature is 48 Fahrenheit. The climate of Greenland is generally dry. People have lived on Greenland for about 5, 000 years, the earliest belonging to what are called the Independence I, Saqqaq, and Independence II cultures. Greenland is the source of many weather changes in the Northern Hemisphere. Their natural

The History and Definition of Solar Cells

The History and Definition of Solar Cells Any device that directly converts the energy in light into electrical energy through the process of photovoltaics is a solar cell. The development of solar cell technology begins with the 1839 research of French physicist Antoine-Cà ©sar Becquerel. Becquerel observed the photovoltaic effect while experimenting with a solid electrode in an electrolyte solution when he saw a voltage develop  when the light fell upon the electrode. Charles Fritts - First Solar Cell According to Encyclopedia Britannica, the first genuine solar cell was built around 1883 by Charles Fritts, who used junctions formed by coating selenium (a ​semiconductor) with an extremely thin layer of gold. Russell Ohl - Silicon Solar Cell Early solar cells, however, had energy conversion efficiencies of under one percent. In 1941, the silicon solar cell was invented by Russell Ohl. Gerald Pearson, Calvin Fuller, and Daryl Chapin - Efficient Solar Cells In 1954, three American researchers, Gerald Pearson, Calvin Fuller, and Daryl Chapin, designed a silicon solar cell capable of a six percent energy conversion efficiency with direct sunlight. The three inventors created an array of several strips of silicon (each about the size of a razor blade), placed them in sunlight, captured the free electrons and turned them into electrical current. They created the first solar panels. Bell Laboratories in New York announced the prototype manufacture of a new solar battery. Bell had funded the research. The first public service trial of the Bell Solar Battery began with a telephone carrier system (Americus, Georgia) on October 4, 1955.