belarus has only small reserves of petroleum and natural gas and imports most of its oil and gas from russia. the main branches of industry produce tractors and trucks, earth movers for use in construction and mining, metal-cutting machine tools, agricultural equipment, motorcycles, chemicals, fertilizer, textiles, and consumer
the history of missouri begins with settlement of the region by indigenous people during the paleo-indian period beginning in about 12,000 bc. subsequent periods of native life emerged until the 17th century. new france set up small settlements, and in 1803 napoleonic france sold the area to the u.s. as part of the louisiana purchase.statehood for missouri came following a compromise in 1820 .
the geology of mars is the scientific study of the surface, crust, and interior of the planet mars.it emphasizes the composition, structure, history, and physical processes that shape the planet. it is analogous to the field of terrestrial geology.in planetary science, the term geology is used in its broadest sense to mean the study of the solid parts of planets and moons.
the stone or stone weight abbreviation: st. is an english and imperial unit of mass now equal to 6.35 kg 14 pounds .. england and other germanic-speaking countries of northern europe formerly used various standardised 'stones' for trade, with their values ranging from about 5 to 40 local pounds roughly 3 to 15 kg depending on the location and objects weighed. antiquity britain and ireland metric stonealuminium
aluminium aluminum in american and canadian english is a chemical element with the symbol al and atomic number 13. it is a silvery-white, soft, non-magnetic and ductile metal in the boron group.by mass, aluminium makes up about 8% of the earth's crust, where it is the third most abundant element after oxygen and silicon and also the most abundant metal.
success in building larger, more efficient steam engines after 1790 meant that the cost of energy fell steadily. entrepreneurs found uses for stationary engines in turning the machines in a factory or the pumps at a mine, while mobile engines were put into locomotives and ships where they turned paddles or, later, propellers . the use of water .
radium is a chemical element with the symbol ra and atomic number 88. it is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals.pure radium is silvery-white, but it readily reacts with nitrogen rather than oxygen on exposure to air, forming a black surface layer of radium nitride ra 3 n 2 .all isotopes of radium are highly radioactive, with the most .
copper is one of the most important constituents of silver and karat gold solders used in the jewelry industry, modifying the color, hardness and melting point of the resulting alloys. some lead-free solders consist of tin alloyed with a small proportion of copper and other metals.