Essay about Lab Report

There are many reasons for identifying an unknown bacterium. The reasons range from medical purposes, such as determining if the unknown could cause ailments in living things or knowing what microorganisms are needed to make antibiotics. The experiment was done by applying methods in order to identify an unknown bacterium.

In order to accomplish this objective, weight assigned are W1= -0.1, W2=0.25 and W3=0.65. As in Table 5 and in Fig. 3, the optimal machining parameters predicted using SA are work speed (Vw= 51.15 m/min), feed rate (f = 16.30 mm/min) and depth of cut (d = 0.01 mm) for a minimum surface roughness of 0.476µm. For these parameters the roundness is found to be 0.028mm with a material removal rate of 20.34mm3/min.

When the pH is not at its optimum, the differing pH's will disrupt the bonding between the R groups of the amino acid causing its structure and the shape of the activation site to change

Table 1 Concentration of protein, DNA, and ratio of the two in heart, kidney and liver of bos taurus. Average standard deviation of protein concentration is also shown.

The number of electrons forming a charge cloud around the nucleus is (pick one of the following) greater than; equal to; smaller than the number of protons in the nucleus of the atom.

Paragraph 1 - How the Law of Conservation of Matter is supported by the experimental demonstrations: In the law of conservation particles and materials are neither created nor destroyed . It was similar towards the experimental demonstrations because nothing changed or destroyed in the processes .Kinetic and potential energy was used in the experiments.

The purpose of the lab was to determine the ratio of air to acetylene results in complete combustion of acetylene gas. The balanced chemical equation for this experiment was C2H2(g) + O2(g) --> CO2(g)+ H2O(l). Complete combustion is the reaction of an element or compound with oxygen to produce the most common oxides and energy. Complete combustion occurs when the fuel and oxygen combine in exact proportions to completely burn the fuel, which leaves a clean test tube. Incomplete combustion is the reaction of an element or compound with oxygen to produce some oxides with less oxygen than the most common oxides. Incomplete combustion occurs when there is not enough oxygen to react

The purpose of the “chi-square test” was to see if our data was in an acceptable range of a specific ratio listed above. The chi-square test took into account the expected deviations in the F2 offspring’s alleles.

The first process examined uses the Lablond Lathe machinery and requires a machined diameter of 7.7250, plus tight tolerances of + .0005 inches. A Process Capability Ratio (Cpk) analysis of the lathe’s data, results in a Cpk of .379 (exhibit A). A result of less than one indicates the machine is not capable of matching the tolerances laid out in the IMS spec. Therefore the Lablond Lathe is not suitable to handle the process it is being used for. Before a more suitable machine is selected, the Lablond Lathe should be checked for calibration, as should the measuring equipment used. If all fall within calibration specs, new

groups. It was conducted to further the research in choice overload and paralysis of the mind.

We started our measurements at point C2, we set up our total station at point C2, and the prism at 3B and B2. Then we started to measure, but due to weather reasons, we spent a lot of time on this measurement. We measured 3B first, but because of the distance between 3B and C2, we spent a lot of time on the focus, and the day was a windy wind, so the difference was 3 degrees. Measure the number of angles between C2 and 3B, and then measure the angle between C2 and B2. Then we moved the total station to the B2 point, the two prisms were changed to the C2 and A2 points.

He argues that, while many processes were developed to improve metalworking after the war, the ones that ultimately prevailed were not the ones which were most efficient. He demonstrates how several alternate techniques actually had better results more quickly that the NC (Numeric Control) machining which eventually came to dominate the industries, and in fact the NC machines were often slower for a significant period of years.

In this experiment, the procedure was similar to the procedure performed last week. While we were looking at the action potentials in earthworms, we also needed to solve for conduction velocity, determine when threshold was met, and measure the amplitude. The following pieces of equipment were used in the experiment: Recording cables, amplifier, grass stimulator, loudspeaker, Audacity software, MadSim software, earthworm ventral cord, petri dish, saline concentrations, and Microsoft Excel. After setting up the equipment in the correct order we performed a test using a old recorded action potential from a previous experiment. This is done to verify that the equipment is setup correctly to perform the next three exercises.

The accuracy of CNC machines is mainly determined by a similar positioning resolution along all three orthogonal axes and by the diameter of the rotary cutting tools. There are factors that

If you’ve worked in a machine shop at all in the last 30 years, you know that anytime a machine is set up, the operator is faced with an immeasurable number of choices. Everything about running machines is about choosing from the many ways of doing it. There is definitely “more than one way to skin a cat” when working in a machine shop. For example, think about one of the most simple machine tools, the tried and true Bridgeport knee mill. We have all used one, maybe for 5 minutes to clean an edge or for multiple days building intricate parts. Either way, you may not have noticed all the choices you had when setting up and running the machine. Just to clean up that edge there were decisions whether to use a vise or a clamp set. Or whether to use a power feed or not. Often you subconsciously decide what axis you will be cutting with, what sort of tool-holder to use, and many other physical factors. One of the hardest decisions to make in all of this is what type of cutter to use. It seems simple, many operators just grab an end mill; but to achieve a good quality cut and desired end mill life, there is much more to it. To find out just how many choices there are, a quick search for ½” square end mills at MSC brings up over 1500 choices. That’s a lot of choices! So what do most of us do? Well we grab one that looks like something that we have used before. But as we all very well know, doing things “the way we’ve always done them” is anything but the best way to work in the