Investigating How the Length of a Wire Affects Its Resistance

Investigating How the Length of a Wire Affects Its Resistance
Investigating How the Length of a Wire Affects Its Resistance

In this investigation I will investigate how changing the length ofwire affects its resistance.Apparatus
Lengths of nickel chrome wire
Voltmeter x 1
Ammeter x 1
Electrical wires x 8
Variable resistor x 1
Power pack x 1
Beaker of water x 1

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Investigating the Rate of Reaction Between Magnesium Ribbon and Hydrochloric Acid

Investigating the Rate of Reaction Between Magnesium Ribbon and Hydrochloric Acid
To find out the rate in which magnesium ribbon dissolves in different molars of hydrochloric acid, and which factors affect the rate of reaction. Prediction: The ?Collision Theory? says that particles can only react if they collide with enough energy for the reaction to take place. As well as the collision theory there are also other factors that will effect how quickly and effectively the reactions take place. The four factors that effect the rate of a chemical reaction are: temperature, concentration OF acid, surface area OF the reactant and use OF A catalyst. Temperature -???? The higher the temperature of the solution, the faster the rate of reaction, and vice versa. This is because as the solution heats up the particles gain energy and begin to move faster and with more energy. This causes more successful collisions per minute and consequently a faster rate of reaction. We carried out an experiment in lesson, which involved placing marble pieces in hydrochloric acid. We altered the temperature of the acid and recorded the speed in which the marble dissolved in the different temperatures. After repeating the experiment several times, we found that the higher the temperature of the acid the faster the marble reacted and consequently dissolved. This is, as I said above, because the acid particles have more energy to move around and they collide with more energy, increasing the rate of reaction.

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The Collapse of Communism in Eastern Europe

The Collapse of Communism in Eastern Europe
This essay will give a brief introduction to communism. It will then
discuss the various factors which combined to bring about the collapse of
Communism in Eastern Europe. It will examine each of these factors and
evaluate the effect of each. Finally it will attempt to assertain whether
Rogers? opinion (see above quotation) on Communism is true, that is,
whether communism was truly doomed to fail from the start, or whether its
collapse was a result of external influences.

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Free Essays on The Crucible: Ann Hutchinson

Free Essays on The Crucible: Ann Hutchinson
The American weakness in times of trouble is the instinctive act of finding a scapegoat. Stemming from the Calvinistic religious beliefs of the Puritans who immigrated to America, anything that strays from the predestined lives of these puritanical people is the result of sin. The ideas of ?original sin? and ?predestination? are at the heart of Calvinism. Thus, the Calvinist Puritans have their lives planned out for them by God before birth and anything that disrupts that plan must be eradicated. It was on the basis of this stringent religious way of life that the witch-hunts on 1692 came about. The accusation of people, beginning in Salem, Massachusetts and quickly spreading throughout the Puritan community began because the Puritans needed a scapegoat for their problems. The Puritans accused people of being a witch for actions that were hardly considered illegal and usually had to do with a threat posed to the church. Webster?s Dictionary defines a ?witch? as 1. A woman practicing the black arts; 2. A charming or alluring woman; 3. An ugly old woman; 4. One supposed to possess supernatural powers with the devil or a familiar. The last definition being the only applicable definition here is hardly pertinent. The phenomenon of the witch-hunts in Puritan New England rose out of flawed theory, sexism, and fear as seen in John Winthrop?s account of the trial of Anne Hutchinson, the actual transcript of the trial of Anne Hutchinson, and Arthur Miller?s The Crucible.

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Production of Zinc Sulphate

Production of Zinc Sulphate
Aim: My aim for this investigation is to make Zinc Sulphate and find the percentage yield. I am going to produce 14g of Zinc Sulphate. Hypothesis: I predict that when we mix Zinc oxide (Zno) with sulphuric acid (H2so4), I will get an end product which is a cleanly white solution. The solution is Zinc Sulphate (Znso4) and water (H2o). I also predict that there are other chemicals which can also be mixed with Sulphuric acid to produce Zinc Sulphate. The chemicals are Zinc hydroxide (ZnoH) and Zinc carbonate (Znco3). I think the Zinc Sulphate produced with these different chemicals will have different reaction rates. I also think that Zinc Oxide is the compound which will produce 14g Zinc Sulphate.

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Egg Albumen Experiment

Egg Albumen Experiment
The purpose of this investigation is to establish which is the lowest concentration of Copper (II) Sulphate solution that will denature a sample of egg albumen (egg white) at room temperature. The base of the reaction is the globular protein (albumen) being denatured by a heavy metal (Copper (II)), the copper (II) reacts with the NH3 group causing it to denature, this means the proteins? secondary and tertiary structures are being altered and refolding into different shapes, this resulting in a change from the substance being clear to turning opaque

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LSD

	 LSD
For thousands of years people have spoke of all types of visions. Whether the visions were from religious groups, Indian tribes, or self proclaimed prophets; all types of people have seen things. This was more than likely occurring with the help of different types of hallucinogens. Hallucinogens have been around since the beginning of time. Some mushrooms, cactus flowers, and even different types of mold are all able to produce hallucinogenic effects. However, it was only within the last century that man actually started to produce his own. lsd, or lysergic acid diethylamide-25, is a relatively new substance in society. All known effects show lsd, or acid, as the harmful drug most people know it as. There are people who believe acid has positive effects, but they are by far the minority. lsd is an interesting drug due to its strange past and the hallucinogenic effects, and it still remains quite popular in society today.

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6-Week Training Program

6-Week Training Program
To maintain or improve skill and fitness, training needs to takeplace. Training can be in many different forms and applied in manyways. The main aspects of training are:
The principles
The methods, application and effects
Training sessions

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The Rise and Fall in Oil Prices

The Rise and Fall in Oil Prices
Market Equilibrium Price and Quantity Equilibrium price is a price that is stable, no other forces act on it, where the planned purchases are exactly equally to the planned sales. If the price is higher than this point, some goods not sold, then there is an excess supply. market equilibrium To counter this prices will be cut to increase demand and the market will move back towards the equilibrium position. The net effect of all changes is for the market to move back towards the equilibrium position. Shift in Supply and Demand Supply is output that companies produce to try and match demand for that product. Supply will shift up or down depending on the market conditions. As prices increase supply will increase as companies try to make a larger profit, in most cases. Demand is the want for a product by a consumer. Change in demand can be positive or negative. A shift in demand will be a result of another factor external or internal which will result in demand levels increasing or decreasing

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The Old South in Colonial America

The Old South in Colonial America
The task system also showed assimilation into the British world, African words and customs survived long in South Carolina than the Chesapeake Newly imported slaves spoke Gullah a 2nd language pidgin language. Gullah bagan with phrases common to many West Africans language. Gradually English words were added and became the natural language of later generations.

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