Practical: The Effect of Concentration on Reaction Rate Aim: To use a simple reaction between sodium thiosulphate and hydrochloric acid to discover concentration this determines how fast chemical reactions occur. Independent Variable: Concentration of hydrochloric acid (%) Dependent Variable: Time taken for chemical reaction to take place (sec) Hypothesis: My prediction is that the increased concentration of the thiosulfate will in turn lead to an increase in the rate of reaction. This
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ball is thrown upward at time t=0 from the ground with an initial velocity of 18 m/s (~ 40 mph). Assume that g = 10 m/s2. Time to reach apex 18/10 = 1.8 Time x 2 = 3.6 Great height reached by ball – (Velocity)(time)+(-5)(time^2) 18x1.8+(-5)(1.8^2)=16.2 A model rocket accelerates upward from the ground with a constant acceleration‚ reaching a height of 63 m in 8 s. * Speed at height 63 - 2x63/8 = answer What is the acceleration= answer/8 * If you were to drop a rock from a tall building
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initial rate of reaction. I will measure the effect of the enzyme in 5 different concentrations against the controlled variable of the reactant. The enzyme which will be used is different concentrations of potato and the reactant used will be Hydrogen Peroxide. Hydrogen Peroxide which will be the buffer solution is a PH of 7.2. My hypothesis for the experiment is that as the concentration of the enzyme is increased the rate of reaction will be increased‚ producing oxygen at a faster rate. The results
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The Hippie Movement was the most well known and influential movement of the 60’s.The countercultural movement originated as a youth movement in college campuses around the US‚ eventually spreading into the UK and Canada. Not only was it a political movement‚ it was also a lifestyle. The Hippies had an array of concerns but the main tenet was about being happy. Most rejected large institutions‚ the middle class‚ and conformed society. Their attitudes toward life contained little thought or concern
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Women’s suffrage was a difficult topic in the late 1800’s early 1900’s because women wanted to have a voice in their community while men thought that women were weak and should be silenced. Woman fought for their rights‚ impacting everyone globally and showing men that they had a strong opinion and wouldn’t be silenced even if the consequences meant getting arrested or being deported. Many people were against women’s suffrage because they believed that women should be the ones who should stay at
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¨Until blacks and whites see each other as brother and sister‚ we will not have parity. It´s very clear.¨ (Maya Angelou). The Scottsboro trials took place 1931-1937 because nine black teenagers that were on a train from Chattanooga to Memphis seeking work‚ had been accused of rape by two white women that were also on the train that day. In the PBS video that we watched in class about the Scottsboro Trials there was much racism against blacks used during their trials that made an impact on history. In
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World there are several things are abnormal and are frowned upon here on Earth‚ while these things are abnormal here in the novel these things are completely normal and that is just the way that things are done. One such example is shocking babies to train them‚ while on Earth this idea is taboo and highly frowned upon in the novel this is normal and the way that babies learn about how to do things. A second thing that is strange in A Brave New World would be the sexaphones‚ a musical instrument that
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deviation =10.59 3. If the variance is 846‚ what is the standard deviation? Solution: standard deviation = square root of variance = sqrt(846) = 29.086 4. If we have the following data 34‚ 38‚ 22‚ 21‚ 29‚ 37‚ 40‚ 41‚ 22‚ 20‚ 49‚ 47‚ 20‚ 31‚ 34‚ 66 Draw a stem and leaf. Discuss the shape of the distribution. Solution: 2 3 4 5 6 | | | | | 219200 48714 0197 6 This distribution is right skewed (positively skewed) because the “tail” extends to the right. 5. What type of relationship is shown by this
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research Do women’s ideas of ‘normal’ birth match those held by professionals? Abstract Aim: To explore the definitions of normal birth held by women who have not given birth‚ what influences that perspective‚ and compare it with those of health professionals. Background: Available evidence provides conflicting definitions of normal childbirth. The majority of available evidence encapsulates the views of the health professionals themselves or women who have experienced childbirth. Little evidence
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thought the United States’s future faced limited opportunity. It was the longest and darkest economic depression in American history. Then signs of recovery began to show in the early 1930s. The American economy lost more than $30 billion on October 24‚ 1929 also known as Black Tuesday. All major European countries were near bankruptcy after WW1 ended but United States and Japan were financially in good shape. The United States was making more product and made less demand causing the Stock Market
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