Chem 21 Fall 2009 Experiment 9 — Recrystallization _____________________________________________________________________________ Pre-lab preparation. (1) Read the supplemental material from Zubrick‚ The Organic Chem Lab Survival Manual. (2) Draw the structure of acetanilide and report relevant physical data. Be sure to cite the source of the data. You should be able to figure out what’s relevant by reading the procedure. (3) Find and report the boiling points of the solvents you will be using
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Crater Design Experiment Aim: To see how the height in which the ball is dropped from affects the depth of the crater. Hypothesis: I predict that as the height in which the ball is dropped from increases‚ so does the depth of the crater (the data will be directly proportional). The scientific knowledge which supports this is that the golf ball has a gravitational potential energy which increases as the ball is dropped from higher heights. When the height increases the ball gains more gravitational
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Conflict of professional interest frequently arise in the working environment of an engineer. Discussion the statement and propose the appropriate solutions for overcoming the problems. Conflict is so common in today’s world that is full with sophistication and complexity. All of us are facing with some kind of conflicts in our life. We are frequently encountering conflict with our family members‚ friends‚ colleagues or even our bosses. Everybody‚ individuals‚ societies or countries are looking into
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The floating egg experiment – How much salt is needed to make an egg float? Aim: To investigate the effects of salt on the density of water (and therefore the ability to float an object in said water) and to find the amount of salt needed to float one regular egg in a glass of water. Research: Internet research shows that adding salt to water increases the density‚ and in turn makes it easier for objects to float. 4-10 teaspoons of salt in 1 glass of water is said to be enough to make one egg
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Design of Psychological Experiment The Positive Influence of Yoga exercises on work performance in data entry professions Hypothesis Yoga exercises positively influence work performance in data entry professions. We expect that after yoga exercise participants should be able to file data faster and with higher accuracy. Method Independent Variable In this study‚ the independent variable is receiving or not receiving yoga exercise. Dependant Variable The dependant
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Experiment 1 : Young Modulus Title :Bending of beam and coefficient of elasticity. Objective : To study the relationship between load‚ span‚ width‚ height and deflection of a beam‚ places on two bearers and affected by a concentrated load at the centre. :To ascertain the coefficient of elasticity for aluminium‚ brass and steel. Results : Measurement of test specimen (a) For beam material – Steel | Length‚ L (mm) | Thickness‚ h (mm) | Width‚ b (mm) | 1st reading | 650
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Chloride Equipment: Method: 1. Firstly‚ safety measures were taken by putting on laboratory coats‚ wearing safety goggles and tying long hair back. This was to protect clothing‚ eyes and to avoid burning as the experiment included dealing with open flames. 2. The equipment needed (as shown and labelled in picture A) was collected. 3. Using a measuring cylinder for each‚ to be exact with measurements‚ we measured out 10cm³ of HCl and 10cm³ of NaOH. We used
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1. What police procedures are used during arrests‚ and how do these procedures lead people to feel confused‚ fearful‚ and dehumanized? The police used the art of surprise coupled with a lack of information during arrests. The shock of the abruptness of the arrests‚ public embarrassment‚ as well as being arrested at random times (especially in broad daylight) could all be labeled as contributing factors that would lead the people to feel confused‚ fearful and dehumanized. The behavior of the “prison
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The Rocky Shore Experiment Research Question: How does type of substrate affect the variation of species and vegetation as you move away from the seashore at a Rocky Shore? Hypothesis: As we get further away from the seashore‚ there would be a decrease in the number of species and vegetation found. Also‚ the type of substrate will have a major affect on the biodiversity. Background Information: A rocky shore is an intertidal area of seacoasts where solid rock predominates. Rocky shores are
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District 9 and Racism The aliens encountered in District 9 are treated with the same level of distain and indifference usually reserved for refugees and ethnic minorities. District 9 concerns itself with after the first encounter and the struggle of coexistence. The film is set in South-Africa and bears similarities to the apartheid system including those of the District 6 initiative. In District 9 black and white characters come together to hate on the “prawn‚” the aliens in this story‚ who then
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