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Case 15: Teletech Corporation, 2005

Case Study 3: Estimating the Cost of Capital 1. Currently Teletech Corporation (TC) uses a single hurdle rate for both their Telecommunications Services (TS) and Products and Services (P&S) divisions. This hurdle rate obtained by an estimate of TC Weighted Average Cost of Capital (WACC), which is calculated at 9.3%. When analyzing critically at this…

The Effect of Media on Suicide Rate

In recent days, suicides were one of the major reasons of death among people all over the world. According to suicide organization website, 32637 people died in suicide in 2005, and the suicidal rates’ still increasing. It can be questioned that the reason for people to become suicidal may be related on how the features…

Band Rate List

By storing the Band Rate List in a computer system it can be used to attach ‘payments due’ automatically to each video when a member returns it late. The system can also be efficiently updated. The use of a computer system would also enable Jean to generate a daily report for each shop detailing unreturned…



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Calcium carbonate and Hydrochloric Acid

1. Spatula: We used the spatula to take out the calcium carbonate from the jar because it was the only equipment small enough to fit through the jar. Using another piece of equipment, for example a spoon, would be too large to fit through. 1. Weighing Boat: We placed the calcium carbonate in the weighing…

Persulphate and Potassium Iodide

The rate of which the reaction happened can be found out by using the simple formulae: Speed = Distance Time Distance is what we call the persulphate because we are measuring the amount of persulphate needed to react. The amount of persulphate will always be the same at the end so it doesn’t matter how…

Charging a capacitor at a constant rate

Aim: To investigate how the charge on a capacitor is related to the p. d. applied across it by charging the capacitor at a constant rate. Apparatus: o Capacitor (electrolytic type) 500 ? F o Microammeter 100 ? A o Clip component holder o Stop-watch o CRO o Connecting leads Theory: From definition, the capacitor…

The strength of Ammonia Double

In this investigation I am trying to find out if doubling the strength of ammonia doubles the rate of its diffusion. There are a few factors that may have an effect on the results of this investigation. For example, the size of the test tube, the distances between each piece of litmus paper and the…

Carbonate and hydrochloric acid

If you have a two fixed masses of hydrochloric acid, which have both been crushed up, the one with the smaller particles will have a higher rate of reaction, due to the fact that there is a higher surface area exposed to the hydrochloric acid. A good example to compare this to would be slicing…

The concentration of hydrochloric Acid

There are many factors that have an affect on the rate of a chemical reaction. The speed of reaction means how fast the reactants change into the desired product. The consequence of this is that more of the products are made in a certain period of time if it has a high rate of reaction….

Hydrochloric acid

Prediction I predict that the more marble chips there are, the faster the rate of reaction, because there is more marble for the hydrochloric acid to react with, I predict this because in previous experiments when working with the same equipment I found that if you put a lot of marble in the acid, the…

Calcium carbonate and hydrochloric acid

Accuracy & Methods of Improvement Although it was generally an accurate and fair experiment there were bound to be some inaccuracies and errors. One that was difficult to completely stamp out was where the crocodile clip was placed. For example, at a length of 90cm if the end of the clip was fixed exactly on…

Hydrogen peroxide decomposition

Make sure that the temperature and the amount of the catalyst remain the same throughout the experiment.2. Presentation: Results: Table 1: Time taken for 40mL of gas to be collected when changing the concentration of hydrogen peroxide. H2O2 (mL i?? 0. 05mL) H2O (mL i?? 0. 05mL) Time (s i?? 0. 5s) 1/Time (s-1 i??…

Hydrochloric acid and magnesium

The temperature raised considerably on the other 4 due to the quickness of the reaction. This heat would quicken the reaction due to the fact that the molecules would be vibrating and therefore colliding more often (as explained before).  Sometimes the magnesium floated on the top of the acid. This was not a problem in…

Rate of reaction Vs enzyme concentration

Increasing the concentration means there are more collisions and hence more successful collisions (though it useful to note the ratio of successful collisions to total collisions doesn’t increase). Consequently the rate of reaction increases as more reactant is being used up and more product is being created, for a reaction to take place two reactant…

The enzyme potato catalase

Analysis Instead of filtering out poor data for my results I have decided to select the best result to concentrate on. I removed quite a few results. The reason’s for removing results was either because of missing data, anomalous data (not following the trend of others that I believed to be correct), and unusual entries…

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