Cathode

check for fractured or broken bones, internal damage, or items lodged in the digestive system. Despite the x-ray’s numerous and various uses, it’s discovery was unintentional. Wilhelm Röntgen discovered the x-ray while experimenting with glass cathode-ray tubes and electrical currents. When Wilhelm was looked through the glass he noticed that he could see glowing pieces of barium platinocyanide, even though It was concealed inside a thick, black, cardboard box. Because he did…

X-Rays Development of the X-Ray In 1895, a mechanical engineer and physicist named Wilhelm Roentgen created the X-ray. He was born on March 27, 1845 in Germany. So in 1895, Roentgen was playing around with a cathode ray tube and evacuated all the air inside of it and replaced it with another special gas. Then, he covered the tube so nothing escapes it, passed a current through it, and then the tube produced a fluorescent glow. After further investigations, Roentgen wanted to see how strong this…

Abstract: Electrochemical machining (ECM) is a technique of eradicating metal by an electrochemical procedure. It utilizes an electrolyte and electrical current to ionize and eradicate metal atoms. Electrochemical Machining is a relatively ancient machining system which basis were laid way backside in the 19th century. The process has enhanced extremely everlastingly since, thus becoming an extremely defined practice with gigantic limitless application possibilities across engineering. In this…

x-ray was done over a century ago (1895) by the German physicist Wilhelm Röntgen who did experiments with a vacuum tube with a wire component at one end forming the cathode (-), and a heavy copper target at the other end forming the anode (+). When Röntgen applied a high voltage to the electrodes, the electrons formed at the cathode were attracted to anode and striked with a high amount of energy. Roentgen found that very penetrating radiations were produced from the anode, which he called…

– equation (2 gives info on location of electron in terms of probability density - wave functions are called orbitals – [pic], where E is energy, e2 is electric potential, r is orbital radius and h is Planck’s constant 1925 Wolfgang Pauli – each orbital has only 2 electrons is now explained due to direction of spin of electrons. Spinning electrons create magnetic field. Only 2 electrons of opposite spin in an orbital referred to as Pauli exclusion principle Hund’s rule – half fill…

At the beginning of the 1900s chlorine started to be used as a disinfectant in water. Water had to be chlorinated because of waterborne pathogens which would then go and cause deadly diseases which flourished in our pipes and water ways and infected millions of people. But ever since the disinfection of water the most of these diseases have been eliminated in first world countries but is still a big problem in 3rd world problems. (Calomiris, 1998) Chlorine is the most used disinfectant around…

In this study, the effect of benzenethiol ligand on CdSe/ZnS core/shell quantum dots was investigated. Conventional long-chain oleic acid (OA) and trioctylphosphine (TOP) capping ligands were partially replaced by short benzenethiol ligands, and the improvement in the luminescence performance was observed in quantum dot light emitting diodes (QD-LED). Approximately 1.8 fold improvement was achieved for both the maximum luminance and maximum current efficiency for the QD-LEDs fabricated with…

The issue : Global warming (Benzene 2C6H6) Figure (1) Different ways to create carbon and how it affects the environment. Combustion (O2) is a process that involves benzene. 2 C6H6(l) + 15 O2(g) ---> 12 CO2(g) + 6 H2O(g) Benzene is used as a fuel for cars, it has some problem with the environment. As seen in Figure (1) and the balanced equation that the process of making Benzene makes lots of carbon (gas) which damages the environment because it makes “greenhouse gases” trapped in the…

The Atomic Theory The atomic theory serves as the basic foundation for the study of matter; it is of major importance to the study of Chemistry. The atomic theory has an interesting and lengthy history that shall be discussed. Furthermore, it has been perfected and discussed by many chemists over a number of years; all of their brilliant minds put together into one. There have been drastic changes to the atomic structure in modern times, proving we still do not know everything. Technology…

shown in Figure 2.2, a remarkable number of new materials have been introduced and evaluated as electrode materials for NIBs in the last few years. Similar to LIB chemistry, layered and polyanionic compounds have been extensively investigated as cathode materials, and carbon based materials, metal oxide compounds, and metals have been studied as anode materials (see Figure 2.2 (b),(c)). Prussian blue and organic materials have also been recently examined as electrode materials for NIBs. As…