Purpose: The purpose of the lab was to investigate and demonstrate hydrogen bonding and London dispersion bonding in water and rubbing alcohol. Hypothesis: I believe water will have the greater surface tension because rubbing alcohol’s density is lower than water’s. Materials: * Water * Isopropyl alcohol (rubbing alcohol) * Pennies * Paper clips * Flasks * Cups or jars * Wax paper * Eyedropper Procedures: Part 1: Surface tension and vortex: * Fill
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BIOLOGY IA A Factor That Will Affect Enzyme Activity The Question Effects on Enzyme activity: investigating the effects of mixing Hydrogen Peroxide with Catalase extracted from potatoes at different temperatures‚ and then comparing the results with the same method‚ except to replace the Potato juice with MnO2 Hypothesis Since enzymes are a type of protein‚ they will be destroyed at high temperatures and activity rates will go down at low temperatures. Also‚ if done at low temperature
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I have many reasons to explain my choice. First‚ I wish to come back my childhood to remember my happy and impartial time. After many competition in school‚ university and now‚ society I realize that childhood is the most beautiful time and place. I want to forget all stressfulness‚ competition and response in life. To do that‚ we need a place that has no noise‚ no boss‚ no business‚ no salary and so on. And only childhood give us peaceful‚ it reminds us your games with friends‚ our parents’ sacrifice
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MGT 370 Test 3 Question 1. 1. The risk resulting from possible fluctuations in currency exchange rates is called: (Points : 1) hedging. transaction exposure. the direct quote. floating. None of the above Question 2. 2. In an options market hedge there is the option to sell or purchase certain currencies at a certain exchange rate either on or before a certain date. The agreed-upon exchange rate is called the: (Points : 1) international
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Lab report nº4 The aim of this experiment was to observe the change of enzyme reaction with different concentration of solution. For this experiment we used potato enzymes (catalase) and hydrogen peroxide in concentrations of 100%‚ 80%‚ 60%‚ 40%‚ and 20% According to P.George: “When catalase is added to hydrogen peroxide‚ there is an initial rapid evolution of oxygen which lasts for about two minutes‚ depending on the peroxide concentration. After this‚ oxygen is given off at a steady rate which
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There are many incentives to move away from vivo testing. One of the main motivations to use alternative methods is ethical: toxicity tests in all fields are associated with high levels of suffering (Burden‚ Sewell‚ and Chapman 1-8). Not only are there ethical drives‚ but there are also scientific drives to ultimately eliminate animal testing (Burden‚ Sewell‚ and Chapman 1-8). One scientific drive is the question that must be answered: is it acceptable for a human being to be exposed to it‚ not just
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"If I Could Tell You" Analysis In "If I Could Tell You" W.H. Auden uses personification‚ repetition and imagery in order to prove the point; you must live your life like you do not have time left. Auden gives a vast setting over all. There are two main characters; Auden and time. The dialogue is in first person and he is speaking to some one he cares about. Auden uses personification to give life to time. This shows how time is the keeper of our destiny. He personifies time because he does not
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and not as primitive and barbaric as they are portrayed. 2. How did the Viking raid? ---------A Viking raid nearly always came as a total surprise. The Vikings were expert navigators and knew the coasts of Europe like the back of their hand. They decided on a target and planned the attack in advance. Having the fastest ships of the day they would arrive seemingly out of nowhere close to the target and storm ashore ready to attack. 3. List the countries/regions the Vikings had contact with.------The
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1. How many points have you earned this semester? What was your class average? During this semester‚ I have earned 545 points. My class average is 96%. 2. How would you judge your “attendance” in this class? (how often did you log into Blackboard and/or check your email)? In this class‚ I believe my attendance was very excellent. Over the course of this semester I logged into Blackboard almost every day to check the announcements and assignments listings for this class. As well as my email‚ I check
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Professor Blitshteyn February 27‚ 2013 This is How You Lose Her by Junot Díaz Nilda Junot Díaz expresses his feelings through his literary work‚ This is How You Lose Her. The reactions through the female characters he has describe in his life (fragment finish your thought. The reactions of who? In his life what?). Nilda is a promiscuous girl who was the main character’s brother’s girlfriend who represents a part of the main character’s life. Nilda represents how both men and women can be on the
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