Surface Tension Steven Brignol Dr. Payne September 15 Introduction: Water’s ability to stick to itself is surface tension. In this lab we were able to measure and detect surface tension by dropping water‚ drop by drop‚ onto a penny. The quantity of droplets that fit on the penny was impressive. Hypothesis: The detergent will thicken the water making a tighter surface tension. Prediction: If soap increased the surface tension‚ then expansion will happen. Materials: (1) Pipette (2) Water
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Abstract The purpose of this experiment was to use the muscle tension and the electrical activity in the dominant and non-dominant forearm muscle‚ the flexor digitorum superficialis‚ to analyze the determinants of muscle tension and fatigue‚ and the reasons as to why differences may occur between the dominant and non-dominant arm. The generation of tension in a muscle is determined by the major type of motor unit being recruited‚ as well as the rate in which action potentials are being fired. A subject
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The fifties and sixties of the twentieth century are two of the most influential decades of American history. With out the events of the fifties the vibrant and rebellious sixties would have never been possible. Political‚ racial‚ and social tensions are what pushed many of the events that happened in the sixties. From teenage conformity to loosing to the Russians and sputnik in the space race the events of the fifties were screaming for a drastic change in America. The political struggles of
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Surface Tension Properties of Liquids Introduction The purpose of this experiment is to measure and record the surface tension of water and other aqueous solutions using capillary rise method techniques and practicing lab safety. In this laboratory the surface tension of water depends on the concentration of the following solutes; NaCl‚ acetone‚ and sodium dodecyl sulfate (SDS). Intermolecular interactions as well as other phases (solid‚ or air) make a liquid exist. The data collected will show
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Average: | 0.032 | Table 2: Values for measuring the radius of capillary Temperature | 30 degrees Celsius | Density @ 30 degrees Celsius | 995.67 kg m-3 | Acceleration due to gravity | 9.8 m s2 | Height of water | 0.032 m | Surface tension of water@ 30 degrees Celsius | 7.118 X 10-2 N m | Radius of capillary tube | 4.5592825 X 10-4 m | Table 3: Values for the height of n-butanol solutions in capillary tube Temperature | Trial | 0.1 M | 0.2 M | 0.4 M | 0.6 M | 0.8 M | 30 degrees
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himself. The play is set in spring 1912 in the dining room of the Birlings house in Brumley‚ just before the First World War. It was first performed 1 October 1946 to an audience who had just lived through the Second World War. Priestley uses dramatic tension through the play to make it interesting and full of suspense for his audience. Mrs Birling’s interrogation begins half way through Act Two. So far in the play Inspector Goole entered the Birling Household in Act one whilst they were having a small
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Racial tension in American literature 1930’s-1960’s ‘You know if I was a negro i’d probably think the same way they do’ Anderson ‘If you were a negro nobody would give a dam what you thought’ Ward- Mississippi Burning (1988) During the 1930s-1960s America was a place of racial tension. The blacks and white were not equal. It was a time of black oppression an injustice. These themes are shown through the texts‚ ‘The Help‘ by Kathryn Stockett‚ ‘Mississippi Burning‘ directed by Allan Parker
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Class Tensions in “The Kite Runner” With receiving numerous awards on “The Kite Runner”‚ Khaled Hosseini has become an international best seller. With more than eight million copies sold world wide‚ Hosseini shares that the story was inspired by his childhood in Afghanistan. When moving to California with his family‚ Hosseini recalls the passages in the book of Amir and Baba as immigrants in the United States to be the most resembling of his life. Through the period of adjustment from living in
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cross bridge between the two filaments. Upon to formation of the actin-myosin complex‚ ADP and phosphate molecules are released from the myosin head‚ which subsequently returns to a bent‚ low-energy position‚ pulling the still attached actin filament with it. This is referred to as the power stroke‚ as this is the movement that results in the shortening of the sarcomere (Saladin 2012). When a new ATP molecule is bound to the myosin head‚ the cross bridge is compromised and the bond between the filaments
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memory reveals a tension between past and present‚ as memory spans days‚ years‚ and decades‚ resurrecting the past as an integral part of the present moment. In E.B. White’s essay “Once More to the Lake‚” a father struggles with an internal conflict between the present and the past‚ and between memory and reality. Through the use of contrasting stylistic elements‚ as well as synchronization and repetition‚ the father’s insistence that “there had been no years” (446) blurs the line between his memory and
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