Cause and effect

Cause and effect
Jim Patrick, the foreman and partial owner of dhip Construction and Remodeling, is an ideal subject in a case study on cause and effect relationships. In November of 2004, Jim was contracted to construct a two-level roof-top deck and convert a window to a door at Zhanna and Andrew?s house in Baltimore. At the onset of the project, Jim estimated that the job would be complete within approximately three weeks. After the first week, Andrew began referring Jim to friends who needed the services of a contractor because of the apparent workmanship of the job and the fact that his project was moving at an excellent pace. Nearly immediately thereafter, Jim was hardly ever present at the jobsite, and by the beginning of April, the project was still not complete. Jim had an endless onslaught of excuses for the delays, but because Zhanna and Andrew knew that Jim was mostly working on the houses of Andrew?s friends, they knew that he was not being truthful. When Zhanna and Andrew eventually managed to motivate Jim to work on their project, his work was no longer of the same caliber they had come to expect. Many of the project details went overlooked or were rushed to completion.

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The Causes and the Protest of 1968

The Causes and the Protest of 1968
In the 1960s, the great decade of social change, the civil rights movement alongside student movements worked together to bring about a momentous change in society. In 1968, the New Left continued to take on thousands of members as it developed a more radical approach in its opposition to racism and the Vietnam War. Practically synonymous with the New Left, Student?s for a Democratic Society (sds) argued that militant tactics showed young people that actions could make a difference. sds stated: ?we can make a difference, we can hope to change the system, and also that life within the radical movement can be liberated, fulfilling, and meaningful.? Student unrest passed from ?protest to confrontation to resistance and to outright obstruction; even more startling, the university as a general institution, itself, was now regarded as the enemy, the target for disruption.?

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Town Meetings

Town Meetings
I grew up going to town meetings with Grandma Sue. Every Thursday Grandma would drag me along with her to the meetings. Afterwards, she would always buy me ice cream at Karl?s Ice Cream. I loved our time at the ice cream shop, but hated the meetings. But by the time I was old enough to make my own decisions, I couldn?t bring myself to tell Grandma that I didn?t want to go to the meetings. So I just went along with her.

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The Effect of Light Intensity on the Rate of Photosynthesis in an Aquatic Plant

The Effect of Light Intensity on the Rate of Photosynthesis in an Aquatic Plant
The input variable I will be investigating is light, as light is just one of the 4 factors required in the green-plant process of photosynthesis. Photosynthesis is the process by which green-plants use sunlight, carbon dioxide, water & chlorophyll to produce their own food source. This process is also affected by the temperature surrounding the plant (the species of plant we experimented with, pond weed, photosynthesised best at around 20 degrees centigrade.) Light, temperature & CO2 are known as limiting factors, and each is as important as the next in photosynthesis. Light is the factor that is linked with chlorophyll, a green pigment stored in chloroplasts found in the palisade cells, in the upper layer of leaves. The light is absorbed by the chloroplasts to produce the chlorophyll. The chemical & word equation for photosynthesis is stated below: Sunlight Carbon dioxide + water -???????> Glucose + oxygen Chlorophyll S 6CO2 + 6H20 -???????> C6H12O6 + 6O2 C Light in photosynthesis Photosynthesis cannot take place without light, as light is one of the factors by which the green plant photosynthesises (makes its own food source) Light provides the plant with energy to make the chlorophyll which in turn absorbs the light. From this it can be said that the more light a plant is provided with (the more of a limiting factor is takes in) then the higher the rate at which the pond weed, or any plant, will give off a product of photosynthesis i.e. glucose or oxygen.

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Factors that Affect the Rate of Photosynthesis

Factors that Affect the Rate of Photosynthesis
Outline: A piece of pondweed will be cut and placed into a beaker containing water and sodium hydrogen carbonate. A lamp will be shined on to the pondweed and the amount of bubbles released from the plant will be counted. The lamp will be adjusted to different distances from the plant to try and obtain different results. Photosynthesis Equation: 6CO2 + 6H2O light energy & chlorophyll C6H12O6 + 6O2 Variables: Experimental Variable- Light intensity is to be the variable explored in this investigation. Increasing or decreasing the distance from the light source to the plant can vary light intensity. Fixed Variables- Light Wavelength (color)- Light energy is absorbed by pigments in the leaf such as chlorophyll. Chlorophyll easily absorbs blue light, in the 400-450 nm range, and also easily absorbs red light in the 650-700 nm range. Chlorophyll does not absorb green light or yellow light effectively but tends to reflect them, decreasing the amount of light absorbed and decreasing the rate of photosynthesis

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An Atomic Orbital

An Atomic Orbital
When the a planet moves around the sun, you can plot a definite path for it which is called an orbit. A simple view of the atom looks similar and you may have pictured the electrons as orbiting around the nucleus. The truth is different, and electrons in fact inhabit regions of space known as orbitals. Orbits and orbitals sound similar, but they have quite different meanings. It is essential that you understand the difference between them. The impossibility of drawing orbits for electrons To plot a path for something you need to know exactly where the object is and be able to work out exactly where it?s going to be an instant later. You can?t do this for electrons. The Heisenberg Uncertainty Principle (not required at A?level) says - loosely ? that you can?t know with certainty both where an electron is and where it?s going next. That makes it impossible to plot an orbit for an electron around a nucleus. Is this a big problem? No. If something is impossible, you have to accept it and find a way around it. Hydrogen?s electron ? the 1s orbital

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The Importance of the Human Resource Function

The Importance of the Human Resource Function
Human resource is the backbone of any business. It deals with the most important resource in the business ? people. For any business to achieve its objectives they must plan their resources and one of their key resources is people. They need to get the right people and develop them well in order to meet the organisation?s aims successfully. As an organisation grows and expands, the human resource department will know that the organisation needs to recruit more staff and they plan carefully. Recruiting staff in an organisation is very expensive and costly, so the human resource function helps the organisation to get recruitment right. The main elements of Human resource are:

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Effect of Temperature on The Rate of Photosynthesis of Elodea

Effect of Temperature on The Rate of Photosynthesis of Elodea
Hypothesis I believe that as the temperature rises, the rate of photosynthesis will also increase. That is until the plant reaches its optimum temperature and then the rate of photosynthesis will decrease. Photosynthesis is the process necessary for plants as this is how they obtain their food. The formula for this process is- 6CO2 + 6H2O Ã C6H1206 + 602. The rate of photosynthesis are affected by these factors: concentration of carbon dioxide, light intensity and temperature.If one of these factors increase, the rate of photosynthesis will increase but only to a certain point. The rate of photosynthesis could still increase but not because of an increase in that same factor. Another factor has to increase for the rate to increase. The factor that restricts the other two factors from increasing the rate of photosynthesis is called the limiting factor. For glucose to be made in photosynthesis, water is split into hydrogen and oxygen molecules by the energy absorbed from the sun. The hydrogen then has to combine with the carbon dioxide to produce glucose. If this was left on its own, the hydrogen would eventually combine with the carbon dioxide but it would take a long time. That is why a catalyst is needed to quicken the process. Enzymes are the catalyst used for the anabolic reaction. Enzymes work by colliding with the hydrogen and carbon dioxide.

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The Effect of Force and Mass on Acceleration

The Effect of Force and Mass on Acceleration
In this experiment I aim to find out how the force and mass affect acceleration. I shall do this by setting up an experiment involving a ticker tape timer and trolley, to keep the experiment as fair as possible I will only change one variable at a time. For the first part I will only vary the force (see fig. 1) in difference weights of 1N, 2N, 3N and 4N. In order to keep the friction acting on the trolley constant I will make the ramp which the trolley is on at the exact angle so it would keep moving at constant speed if I pushed it, this simulates no friction. Also I will keep the mass of the trolley constant by weighing it on a top pan balance. Finally the ticker timer was kept at constant time intervals. Aswell as varying the force I decided to vary the mass of the trolley in masses of an extra; 100g, 200g, 300g and 400g. However as in the first part I have to keep the other variables constant, the force pulling on the trolley must stay at 1N and in the same way as before also the friction and time intervals. Another thing that I would usually take into consideration is that the experiment should be repeated to give better results, however this is not important because the ticker timer and trolley give very accurate results.

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A Comparison of Two Seaside Towns

A Comparison of Two Seaside Towns
Seaside resorts are towns that have been recognized along the coastlines. Seaside resorts offer a wide range of entertainment facilities in addition to their wide sandy beaches and sunny weather. Although many people live in these areas, they attract tourists from nearby regions as well. There are several popular seaside resorts in Britain, many of which are located close to large cities. Some of these resorts are Blackpool, Brighton and Great Yarmouth. There is a large variety of leisure services provided by these resorts. The main reason however, continues to be the natural features of the coast. Therefore the main activities expected in such areas include sun bathing, swimming, surfing, boating, rock climbing and quite a few other beach sports and activities. Human additions have also been made to these existing facilities in order to enhance them.

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