She began to think about what an x-ray and a light bulb had in common. She jerked up and grabbed her chemistry book and flipped to the index, searching for x-ray machines. The page had a diagram showed an “electron emitter” and a “tungsten target”. In excitement and fear, she quickly turned back to the section on “Terms of Light and the Elements”. Light bulbs.…
Another theme that is observed is conspiracy theories that progresses throughout the series. Alien abductions and paranormal activity in the show are not just mysterious extra-terrestrial imaginings. To give the narrative more complexity, The X-Files convolute its paranormal subject connecting it to government agencies. Mulder knows for a fact that the government is behind many of the crimes and is eager to uncover it. The link between the alien abductions and the government mirrors the anxieties of the modern world.…
Development of the steel industry was boosted by discovery of the Bessemer process. ("Second Industrial Revolution") Henry Bessemer and William Kelly drastically reduced the cost and time needed in producing steel from pig-iron. They found out that that blasting air through molten iron produced high quality steel. Steel was widely used in construction of buildings, because it provided good support for skyscrapers and tall towers.…
story by mentioning other elements that changed when expose to extreme temperatures, ending the chapter with a discussion on yttrium (Y) and neodymium (Nd). In the seventeenth chapter, starts with Donald Glaser, the drunk who was interested in bubbles. Surprisingly, Glaser won a Noble Prize at the age of Thirty-three after he switched his research from bubbles in beer to bubbles in liquid nitrogen (N2). Kean also mentions Ernest Rutherford, who was interested in radioactivity.…
He was born on April 6, 1928 in Chicago, Illinois. He attended Horace Mann Grammar School and South Shore High School. He stayed there until he won a scholarship to the University of Chicago, and enrolling at age 15. He had two sons, Duncan James Watson, and Rufus Robert Watson. He was married Elizabeth Watson in 1968…
In the beginning, all it took was one scientist named, Walter Alvarez, to spur a whole scientific community into looking for more and more evidence regarding the mass extinction including the dinosaurs between the Cretaceous and Tertiary periods. The pathway all started with a surprising observation, Walter had unearthed a thick claystone layer that was devoid of all fossils which the level only containing a much smaller number of fossils. Armed with this evidence, Walter started asking around, first with his own father Luis Alvarez. From there they came up with a hypothesis and brought in Richard Muller. With each new discovery, Walter’s team grow to include physicist and chemists.…
“It was the discovery that a piece of magnetized iron…
Alfred Nobel built bridges and buildings in Stockholm and was inspired to find an easier way to blast rock. He first started experimenting in 1860 with nitroglycerine. Nitroglycerine is very volatile when in its natural liquid state. Nobel used this to blast through rock until he became interested in finding a safer way to blast rock.…
Carl Wilhelm Scheele, a Swedish chemist, was the first one in 1772, to identify oxygen as one of the first constituents that are in the air, calling air fire and vitriol air. But who is considered the discoverer is Joseph Priestley, a British chemist and English minister of a church in 1774, year in which he published his results on the discovery of oxygen. As both did, they are credited with the discovery of the…
It was discovered by working with a cathode-ray tube in his laboratory where he discovered a fluorescent…
Joseph Priestley died 214 years ago but is remembered as being an influential scientist of the eighteenth century. Priestly made many scientific discoveries but one of his most important discoveries, and the one his is most remembered for today, is the discovery of oxygen. Priestley was born near Leeds on 13th March 1733 and spent much of his adult life as a teacher and preacher. As well as science, Priestley was extremely knowledgeable in many areas including theology, history, education, aesthetics and politics.…
Back on the date of June 18, 1773 Joseph Priestley was in his science lab exploring and studying about the elements. Priestley had done a lot of experiments to find more about the element now known as oxygen. The first experiment dealt with using the previous methods Carl W. Scheele used. Carl W. Scheele was a chemist from sweden, but in his discovery of oxygen he had other people helping him throughout the process. Joseph had thought in his mind, “ If I can do this scientific inquiry on my own, I will technically become the first person to discover oxygen.”…
III. Assessment of right ventricular function in chronic chest diseases 1. Physical examination It is difficult to distinguish chronic lung disease from associated PH and RV dysfunction. Increased exertional dyspnea may arise from new RV dysfunction or progression of the underlying parenchymal lung disease.…
According to Encyclopedia Britannica in Britannica School the word tungsten comes from the mineral scheelite which was once called tungsten, which means heavy stone. The name comes from the Swedish chemist and his countrymen who discovered the metal in scheelite. The atomic number of tungsten is 74 and tungsten’s atomic weight is 183.84. Tungsten is also one of the densest and hardest metals in the world. From Encyclopedia Britannica in Britannica School, tungsten was discovered by a Swedish chemist named Carl Wilhelm Scheele who discovered tungsten oxide in scheelite, while two brothers, the Spanish chemists Fausto and Juan Jose de Elhuyar used wolframite to prepare the first sample of tungsten metal.…
Risks and Benefits of Diagnostic X-rays General Purpose: To inform. Specific Purpose: After hearing my speech, my audience will know more about the risks and benefits associated with diagnostic x-rays. Thesis: Medical benefits of diagnostic x-rays outweigh any slight risks. Introduction…