Vacuum tube

Synthesizing Acetylsalicylic Acid from Salicylic Acid Shultz, Joshua T. Chemistry 2210L Data Figure 1. Esterification of Salicylic Acid to Yield Acetylsalicylic Acid Figure 2. Acetyl Group Table 1. Reference Data, Experimental Volumes, Yields, and Melting Points Melting Point of Salicylic Acid 158° C Melting Point of Acetylsalicylic Acid 138° C - 140° C Initial Mass of Salicylic Acid 0.510 g Theoretical Yield of Acetylsalicylic Acid 0.665 g Experimental Yield of Acetylsalicylic Acid…

Abortion causes many different problems. A woman who goes to a clinic and has her baby aborted is at risk for psychological trouble. Post-traumatic stress disorder sometimes develops when a terrifying event happens. Though a woman that has an abortion is probably pro-choice, that does not change the fact that abortions are very frightening. Even though the 1973 decision in Roe v. Wade legalized abortion, the federal government still restricts a lot of funding for it. Like Shimabukuro (2015)…

methods of abortion have been used to get rid of unwanted pregnancies. Medical abortions are when a woman takes medication early in her pregnancy to abort the baby. Surgical abortions include vacuum aspiration and Dilation and Evacuation (D&E). In vacuum aspiration, the fetus is suctioned from the womb with a vacuum device. After twelve weeks, a D&E is usually done (Abortion Risks). In a D&E,…

reduced pressure, then the voltage is then applied across two electrodes inside the container, a discharge will then occur allowing the gas to become conductive. One of the most important experiment in the discovery of electrons was the Cathode Rays tube. The above experiment reveals bright lines are observed to come from the cathode, negative electrode also known as Cathode Rays. Before there were many controversy over the nature of cathode rays. Many German physicists thought that cathode rays…

10ml/min gas flow Liquid Phase Operation Vacuum Operation 25-50oC 200-300oC Table 1: Requirements for both liquid chromatography and mass spectrometry In order to overcome the incompatibility issues, technological interfaces for LC-MS were developed. Without an interface, upon injection of the analyte the liquid would vaporize and large amounts of gas would get into the MS unit. The interface transfers the analyte in solution phase from the LC column to the high vacuum of the MS as a single…

external intercostals, scalenes, and sternocleidomastoids (pg. 536 Silverthorn). Inhalation and exhalation begin with the contraction and relaxation of the diaphragm, a dome-shaped muscle beneath the lungs. The diaphragm’s contraction downward provides a vacuum of pressure differences to bring air into the lungs. During exhalation, the diaphragm is relaxed upwards, pushing air out of the lungs. The lungs have a spongy tissue with its volume engaged in air-filled spaces. The lungs are covered in…

LAr electromagnetic calorimeter: This is designed to measure the energy of particles which interact via elctromagnetic interactions. To achieve good calorimeter performance the central solenoid and LAr emc is placed in a common vacuum vessel. It consists of two parts: barrel and two end caps placed in cryostat. The barrel consists of two identical half-barrels, seperated by a small gap (4 mm) at interation point. End-caps are further divided into two coaxial wheels: inner and…

thermal expansion, a non-stable laser source, or a poor vacuum. Anything that interferes with the detection of a gravitational waves signal is referred to as noise. If the laser source does not emit a constant, or stable, frequency of light the photodetector will detect a change in the intensity. Thermal expansion will change the arm lengths of the interferometer, thus changing the detected interference of the recombined beams. If the vacuum environment in the system is not low enough the…

of elasticity, exceptionally transmit x-rays and sounds at very high velocities. Moreover, it has the ability to act as a source, moderator and reflector of neutrons. It can be forged, rolled and extruded, machined, punched, sheared and casted by vacuum casting. Commercially, it is available in block, rod, sheet, pebble, metal disk, foil and powder form. Beryllium…

factors lead to the untimely demise of the original ABC? Let’s first investigate what claims the ABC had to being called the first modern computer. Like modern computers the ABC used binary to represent all numbers [1]. It used electronics such as vacuum tubes and transformers rather than mechanical switches [1]. The…