مشاهدة النسخة كاملة : please please i need help mes amis svp
k.mohamed06
2012-04-05, 22:39
slùùùù a tout
mine fadlikoume auride 7ale tamrine ta3e engli Say it in writing P 113 act 1:sdf::sdf::sdf:
k.mohamed06
2012-04-05, 22:55
cccccccc
les amis wine rakoume pllllllllllllllizzz
k.mohamed06
2012-04-06, 16:09
pleaseeeeeee
k.mohamed06
2012-04-06, 16:37
pleaze i nedd help
Narcisse95
2012-04-06, 18:43
Albert Einstein 14 March 1879 – 18 April 1955) was a German-born theoretical physicist (http://en.wikipedia.org/wiki/Theoretical_physics) who developed the theory of general relativity (http://en.wikipedia.org/wiki/General_relativity), effecting a revolution in physics (http://en.wikipedia.org/wiki/Physics). For this achievement, Einstein is often regarded as the father of modern physics (http://en.wikipedia.org/wiki/Modern_physics). He received the 1921 (http://en.wikipedia.org/wiki/List_of_Nobel_laureates_in_Physics) Nobel Prize in Physics (http://en.wikipedia.org/wiki/Nobel_Prize_in_Physics) "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect (http://en.wikipedia.org/wiki/Photoelectric_effect)"The latter was pivotal in establishing quantum theory (http://en.wikipedia.org/wiki/Introduction_to_quantum_mechanics) within physics
Near the beginning of his career, Einstein thought that Newtonian mechanics (http://en.wikipedia.org/wiki/Newtonian_mechanics) was no longer enough to reconcile the laws of classical mechanics (http://en.wikipedia.org/wiki/Classical_mechanics) with the laws of the electromagnetic field (http://en.wikipedia.org/wiki/Electromagnetic_field). This led to the development of his special theory of relativity (http://en.wikipedia.org/wiki/Special_theory_of_relativity). He realized, however, that the principle of relativity could also be extended to gravitational fields (http://en.wikipedia.org/wiki/Gravitational_fields), and with his subsequent theory of gravitation in 1916, he published a paper on the general theory of relativity (http://en.wikipedia.org/wiki/General_theory_of_relativity). He continued to deal with problems of statistical mechanics (http://en.wikipedia.org/wiki/Statistical_mechanics) and quantum theory (http://en.wikipedia.org/wiki/Quantum_mechanics), which led to his explanations of particle theory (http://en.wikipedia.org/wiki/Particle) and the motion of molecules (http://en.wikipedia.org/wiki/Brownian_motion). He also investigated the thermal properties of light which laid the foundation of the photon (http://en.wikipedia.org/wiki/Photon) theory of light. In 1917, Einstein applied the general theory of relativity to model the structure of the universe (http://en.wikipedia.org/wiki/Universe) as a whole..
k.mohamed06
2012-04-06, 21:09
:):):):):)merç ma sœur
old young miss
2012-04-07, 09:49
Louis Pasteur
Pasteur was a French chemist and biologist who proved the germ theory of disease and invented the process of pasteurisation.
Louis Pasteur was born on 27 December 1822 in Dole in the Jura region of France. His father was a tanner. In 1847 he earned a doctorate from the ةcole Normale in Paris. After several years research and teaching in Dijon and Strasbourg, in 1854 Pasteur was appointed professor of chemistry at the University of Lille. Part of the remit of the faculty of sciences was to find solutions to the practical problems of local industries, particularly the manufacture of alcoholic drinks. He was able to demonstrate that organisms such as bacteria were responsible for souring wine and beer (he later extended his studies to prove that milk was the same), and that the bacteria could be removed by boiling and then cooling the liquid. This process is now called pasteurisation.
Pasteur then undertook experiments to find where these bacteria came from, and was able to prove that they were introduced from the environment. This was disputed by scientists who believed they could spontaneously generate. In 1864, the French Academy of Sciences
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accepted Pasteur's results. By 1865, Pasteur was director of scientific studies at the ةcole Normale, where he had studied. He was asked to help the silk industry in southern France, where there was an epidemic amongst the silkworms. With no experience of the subject, Pasteur identified parasitic infections as the cause and advocated that only disease-free eggs should be selected. The industry was saved.
Pasteur's various investigations convinced him of the rightness of the germ theory of disease, which holds that germs attack the body from outside. Many felt that such tiny organisms as germs could not possibly kill larger ones such as humans. Pasteur now extended this theory to explain the causes of many diseases - including anthrax, cholera, TB and smallpox - and their prevention by vaccination. He is best known for his work on the development of vaccines for rabies. In 1888, a special institute was founded in Paris for the treatment of diseases. It became known as the Institut Pasteur. Pasteur was its director until his death on 28 September 1895. He was a national hero and was given a state funeral
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