|
Enter your query below to search our database containing over 50,000+ essays and term papers
Search results 451 - 454 of 454 matching essays
- 451: Aluminium
- ... alumina, which is in turn found from the ore bauxite'. Bauxite is often mined in the opencast method. Aluminium deposits are found in many countries, but the countries with significant deposits include: Guinea, Jamaica, Surinam, Australia and Russia. How is Aluminium refined? One method is the electrolytic process'. This is performed when a low voltage current is passes through a bath containing alumina in the molten form. The alumina is broken ...
- 452: The Lowell Observatory
- ... McAllister telescope dome, which is 16" long, are also telescopes you would find at Lowell Observatory. The most modern telescope they have there is the Anderson Mesa Telescope. Their ninth telescope is located in Western Australia. Many of these nine telescopes are equipped with state of the art electronic cameras, auxiliary instrumentation and spectrographs. Recently they have gotten the privilege to have the access to the Navy Optical Interferometer. Lowell does ...
- 453: Chloroflourocarbons
- ... about five percent since the mid-1960's with cumulative losses of about ten percent in the winter and spring. A five percent loss occurs in the summer and autumn over North America, Europe, and Australia. The world has been forced to address this issue. Thus, the major powers of the world created a global treaty, the Vienna Convention for the Protection of the Ozone Layer. The agreement was put into ...
- 454: Immigraton Laws
- ... a year could not exceed 3 percent of the number of foreign-born residents of that nationality living in the U.S. in 1910. The law applied to nations of Europe, the Middle East, Africa, Australia, New Zealand, Asian Russia, and certain islands in the Atlantic and Pacific. In 1924, the basic immigration quotas were changed; the new law provided for annual immigration quotas for all countries from which immigranta might ...
Search results 451 - 454 of 454 matching essays
|
