Purpose: To find out if the Unknown substances are bases or acids. Materials: goggles aprons paper for data table graduated cylinder unknown I substance beakers/test tubes stirring rod litmus paper pH indicator paper pH color chart phenolphthalein scoopula eye-dropper digital pH meter magnesium ribbon calculator unknown II substance forceps sodium bicarbonate Procedures: Test the pH of the Unknown substances with litmus paper and pH indicator paper and match to color chart
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Crash and the causes of the Great Depression in the USA The Wall Street Crash and the causes of the Great Depression in the USA This chapter has three aims: to give an account of the Wall Street Crash; to examine the causes of the Great Depression; and to consider the effects of the Crash. It considers the events leading to the Crash and examines how healthy the US economy actually was before it by looking at some of the underlying causes of the Great Depression. Finally‚ it discusses the relationship
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What is Depression? Most adults and many children and adolescents have a few bad days here and there‚ sometimes three or four in a row. When this happens‚ your mood is bad‚ you feel like jumping on people for nothing. You sleep‚ but you do not rest. You eat‚ but you are not hungry. Your life is one big chore. Everything that was fun is work and what usually is work is like walking with lead boots. Often you have stomach aches‚ headaches‚ aching‚ dizziness and other symptoms‚ but the doctors can
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The acid-fast stain is performed on samples to demonstrate the characteristic of acid fastness in certain bacteria. Acid fastness is a characteristic that is shared by just a few organisms‚ so staining to determine if organisms possess this trait is useful in microbial identification schemes. The Ziehl-Neelsen method has endured as a reliable and effective way to demonstrate the acid-fast bacteria. Materials: 18-20 nutrient hour agar slant culture of Staphyloccus aureus 4 day old nutrient
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Teenagers deal with more problems than people may think. One teenager‚ as described by an article‚ dealing with depression was sixteen and is named Jennifer. Jennifer is older now but the memories of her depression will stick with her the rest of her life. The cause of depression can be many different things that are going on in their lives. In Jennifer’s case it was the way that she looked‚ so she took diet pills. Something inside of her was missing‚ so Jennifer took diet pills to fix the emptiness
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Minerals-to-Metals Research Initiative‚ Department of Chemical Engineering‚ University of Cape Town‚ Private Bag‚ Rondebosch‚ 7701‚ South Africa a r t i c l e i n f o Available online 17 June 2010 Keywords: Acid mine drainage Prediction test Sulfide tailings a b s t r a c t Acid mine drainage (AMD) is formed by the microbially catalysed oxidation of sulfide minerals on exposure to moisture and air. It results in the ongoing contamination of water streams with acidity‚ sulfate and metal
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Causes of Depression Depression is a psychological disorder when the human being has negative thoughts and behaviors due to low mood caused by stress‚ overwork‚ or any other events. Among doctors depression is seen as an illness or disorder. When depression occurs‚ one might also have headache‚ slow speech‚ feel pain through entire body‚ digestion problems‚ and problems with sex. Depression happens to people of any age; every person experiences it differently. An old-age person with depression may feel
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UNIT 5 Study Guide: The Great Depression and the Americas Overview: The Great Depression had a monumental effect on American society‚ and its effects are still felt today. Franklin Roosevelt‚ the architect of the New Deal‚ is considered by many to be one of America’s greatest presidents‚ and he was the model for activist presidents who desired to utilize the power of the federal government to assist those in need. The origins of the Great Depression can be found in economic problems in America in
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Exercise 10 Acid/Base Balance NAME 1. Match each of the definitions in Column A with the appropriate description in Column B. Column A Column B F 1. pH E 2. acid D 3. base A 4. acidosis B 5. alkalosis C 6. carbon dioxide a. condition in which the human body’s pH levels fall below 7.35 b. condition in which the human body’s pH levels rise above 7.45 c. mixes with water in the blood to form carbonic acid d. substance
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Infant Depression The evolution of the concept of depression in infancy (0-3 years) is relatively new and follows a path similar to the history of depression in adolescence‚ then in childhood‚ and in preschool years. Doctors predict that 1 in every 40 infants is suffering from depression. Depression is the most frequent psychiatric disorder and has long-term‚ compromising effects on the mother-infant relationship and the child’s development. The infant continuously faces a climate of negative
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