Helium

When the star is first fused it begins to run off of elements such as hydrogen and helium and is mainly composed of these two elements. Copper begins to be burned right after the main sequence of a high mass star's life. Scientists have a name for the process in stars that begin to fuse copper. The name for this process is called the s-process…

However despite the horrifying stories they heard, when they really needed it African Americans did not have many other options because Hopkins was the only hospital around that would treat them. Also, during this time people everywhere and not just African Americans often did whatever the doctors said and would never truly question the honesty or ethical standing of any. With these two things in mind, Henrietta did what she needed to do and sought care at Hopkins. However, it would become clear…

charged electrons. Here, the electrons represents the plume in the pudding of positive charge. Hence his model was known as plum pudding model. It was also known as watermelon model where the positive charge was the flesh of the watermelon and the electrons were the sects. a) J.J. Thomson who discovered the electron in 1897, proposed the plum pudding model of the atom in 1904 before the discovery of the atomic nucleus in order to include the electron in the atomic model. b) In Thomson’s model,…

Star Journal Year 1: Today my nebula started collapsing. A star a few light years away exploded in a supernova, which started my formation process. I’m feeling changes in my gravitational pull, I think it’s getting stronger. I’m so excited, in a few million years, I’m going to be a protostar! I can feel all of the gas and dust starting to form around me, slowly condensing. It’s making a huge spinning disk around me, and the cloud of hydrogen is getting smaller. My core isn’t hot enough to start…

products, like Tritium, that are produced from the fusion process are not high activity/long life radioactive waste which means they can be disposed of safely and not impact either people or the environment. The main product used in the fusion process is Helium, which is inert, and can do little to no damage to the environment. In the part of the building housing the fusion process the main component that could be radioactive would be the reactor itself (CCFE, n.d.). And the reactor components…

1.2 Types of welding There are so many types of welding process to weld metal or non-metals are given below. Welding is generally two types: (i) Conventional (ii) Nonconventional 1.2.1. Conventional welding Arc welding (i) Shielded metal arc welding (SMAW), (ii) Gas metal arc welding (GMAW), (iii) Flux cored arc welding (FCAW), (iv)Gas tungsten arc welding (GTAW) or tungsten inert gas (TIG) welding (v) Submerged arc welding (SAW), (vi) Plasma Arc Welding, (vii) Carbon arc welding, (viii) Atomic…

using a 3-point calibration with standard gas (GL Sciences). A gas chromatograph connected to flame ionization detector (FID) Stabilwax -DA capillary column (30 m ×0.53 mm ID, Resteck, USA) was used to measure the contents of VFAs and the alcohol. Helium was used as another carrier gas with the flow rate of 40mlmin-1. The heat-treated sludge was mixed thoroughly using the vortex [G-560 Scientific Industries, USA] prior to COD test, carbohydrate test and protein assay. The COD in the sludge was…

During the 1750 's only few of the American colonists objected to their membership torwards the British Empire. The British provided the colonist with benefits such as political stability, protection, and the freedom to trade and commerce. However, the after effects of the Seven Year 's War caused certain tensions between the colonist and the British empire that worsened the relationship between the two over the entire 1760s to the mid-1770s. At that time, it seemed to many American colonist…

analytes) from a sample relies on their differing distribution between the mobile phase and a stationary phase. The mobile phase is what carries the analyte (components being analysed) through the stationary phase and in GC, it is an inert gas, (usually helium or nitrogen). The gas must be inert so it will not react with the samples to give a false reading. The stationary phase is the substance that is fixed in place during chromatography to which the sample adsorbs. GC can have two types of…

One of the most perplexing and frustrating biological enigmas which scientists have been trying to solve for years is how animals from European robins to fruit flies to beluga whales can navigate their way across earth in the proper direction with each change of season. Decades have passed with no concrete evidence of any biological compass evidence found within any of these incredible travelers; theories have only been postulated. Recently, however, some researchers claim they’ve uncovered a…