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Contemporary history

Physics Lab

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Lab ?Conservation of Mechanical Energy Purpose: The purpose of this lab was to investigate the conservation of mechanical energy using a roller coaster to show that energy is constant/conserved but can change forms. Materials: CPO roller coaster track, physics stand, timer, photo gate, stainless steel marble, meter stick, lab paper, pencil, triple beam balance. Procedure: 1. Gather materials listed above. 2. Find the mass of the marble. 3. Assemble the rollercoaster. 4. Use the meter stick to measure the height from the top of the lab bench to the center of the marble at a number of positions on the roller coaster track, corresponding to the chart on the lab sheet. 5. Record this height on the data table. 6. Plug in and power on the photo gate. Set timer to ?interval?.

Haitian/Latin American rebellions

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In Latin America, the hacienda created a complex social order in society. Since most of the land was controlled by haciendas, it also employed most of the population. Each hacienda is distinct, ranging from hundreds of thousands to hundreds of people working/living here. Together, the residents of these haciendas create a village, as some people may be priests, teachers, clerks, accountants, storekeepers, hired shepherds and cattlemen, and families who rent land. Most of the workers however are African slaves or natives, enslaved by those who came from Europe, establishing a lower class.

Organics definitions

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Organic definitions Homolytic fission ? when a bond breaks by splitting the shared pair of electrons between the two products. It produces two free radicals, each with an unpaired electron Heterolytic fission ? when a bond breaks with both the shared electrons going to one of the products. It produces two oppositely charged ions. Elimination ? when a small molecule is removed from a larger molecule, leading to the formation of an unsaturated product Addition reaction ? when two reactants combined to form a single product. This type of reaction is characteristic of unsaturated compounds containing double or triple bonds

Variation

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Variation A mutation can be defined as a change in the type of the amount of DNA, which arises from: Mistakes in the copying of DNA during, or just before, cell division occurs ? for example, the wrong bases become paired up Damage to the DNA ? some environmental conditions can alter the sequencing of DNA (radioactive materials ? mutagens, such as carcinogens, which cause cancer) Uneven distribution of chromosomes during the division of cells and then fertilisation following on from this and, therefore, carrying the trait or the defect forward

Teen Leadership Speech

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Yo soy ?Gerardo? Soy gracioso y deportista. Me gusta nadar en el verano. Seg?n mi profesores inteligente, pero a veces, yo soy muy perezoso. Me gusta mucho jugar videojuegos y ver la tele. No me gusta nada ni trabajar, ni ir a la escuela. Tambi?n, me gusta practicar baloncesto Yo soy un chico talentoso. No soy art?stico. Yo soy yo.
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Great Depression Children's Story

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G?day. My name is Samuel Ellan Daniels. But you can just call me Sam. I?m going to take you back and show you a look inside my childhood. I was born in 1919, and times were much different then. We didn?t have phones or ipods back then. I was born into a colored family, and as a baby, I remember my parents talking about the KKK. They were a group of people who hated blacks like me. Apparently we were ?different?. My parents always worried about them, and each night before bed we thanked God for keeping us safe. Apparently the year before I was born, a huge war just got over. Everyone was happy, and had jobs. Even my colored parents both got jobs working for Ford. It was pretty special, and I was proud of them. Imagine both your parents working for Microsoft. Yea, it was neat.

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