Energy and Place
ReflectionWhat did you learn about the nature of science by researching, designing, conducting, analyzing and writing about your own investigation? How has this shaped your perspective about science and scientists?
I'm a fan of visual arts so the creating of the poster itself wasn't too difficult. My only issue with my design was the fact that I use an excessive amount of Black. Another thing I would have done differently would be making sure that everything lined up and the center was right on center. The lab completed before this project was how to shield alpha, beta, and gamma particles. So going into this poster project with background knowledge helped me with confidence. I don 't think this has shaped me by any means (this project at least) However, I have been realizing myself not making a conclusion unless I have at least read about it and test it before I make my conclusion. . In my infogrphic over there I was hoping to help people understand Radioactive waves. That there isn't just one type of radiation. If my audience was already aware of that, then I would hope they took away how to shield themselves from potentially harmful rays. Project Reflection Alka Seltzer LabPre Lab Questions 1). The Molar Mass of Sodium bicarbonate (NaHCO3) is 83.96. The Molar Mass of Citric Acid (C6H8O7) is 191.99. The Molar Mass of Aspirin (C9H8O4) is 180.05. 2) In one tablet there are 1000 mg of Citric Acid, 325 mg of Aspirin, and 1916 mg of Sodium bicarbonate. 1000 mg Ca * 1 g Ca/ 1000 mg Ca *1 mol Ca/191.99 g Ca = .0052 moles of Ca 325 mg Asp * 1 g Asp/ 1000 mg Asp * 1 mol Asp/ 180.05 g Asp = .0018 moles of Asp 1916 mg Sb * 1 g Sb/ 1000 mg Sb * 1 mol Sb/ 83.96 g Sb = .0228 moles of Sb 3) 0.325 g C9H8O4 * 1 mol C9H8O4/ 180.05 g C9H8O4 * 1 mol H+/ 1 mol C9H8O4 = .018 mol H+ 1 g C6H8O7 * 1 mol C6H8O7/ 191.99 C6H8O7 * 3 mol H+/ 1 mol C6H8O7 = .0156 mol H+ Together the amount of acetylsalicylic acid and citric acid are 0.0336 4) 1.916g NaHCO3*1mol NaHCO3/83.96 g NaHCO3*1mol HCO3/1mol NaHCO3=.0228 mol HCO-3 5) The limiting reactant would be the bicarbonate, because there is lesser amount of the bicarbonate than the acetylsalicylic acid and the citric acid. |
Hydrate labPre lab Questions
Methods
Post Lab Questions
0.005 mol MgSO4/ 0.02 mol H2O = .25 Formula Units MgSO4 * 4 = 1 formula unit 0.02 mol H2O/ 0.02 mol H2O = 1 Molecule H2O * 4 = 4 molecules Formula = MgSO4 * 4 H2O 2.) (1 g MgSO4 * 7 H2O)/ (1) * (1 mol MgSO4 * 7 H2O)/ (246.51 g MgSO4 * 7 H2O) * (1 mol MgSO4)/ (1 mol MgSO4 * 7 H2O) * (120.366 g MgSO4)/ (1 mol MgSO4) = .49 g MgSO4 3.) Percent Error = (Experimental Value – Theoretical Value)/Theoretical Value * 100 Percent Error = (.64 - .49)/.49 * 100 = 30.6% 4.) An error could have occurred when I was moving the hot crucible, I was afraid of it and dropped a little. The crucible wasn’t damaged. 5.) If given the chance to redo this lab I would have been more careful with my measurements. |
LetterDecember 10, 2014
Dear Director of Engineering Department: Every type of dance has its risks. “Previous studies have reported injury incidence rates of 67% to 95% among professional ballet dancers and 17% to 24% in modern dancers” (Kadel, Nancy J. Foot and Ankle Injuries in Dance. 2006); I have been dancing for a little over 13 years so know how injuries can really set you back. Last year I was finally put on pointe shoes. I noticed that the shape of my feet is different compared to others. If pointe shoes are painful and have long term effects for “normal” feet then, I will experience a more disastrous outcome. I researched a lot about pointe shoes to see what I could do to help protect my feet, back, knees, and ankles from injuries. The outcome of landing a grand jete, sissonne, soubresaut, etc. wrong could be disastrous; The shock of the landing would be absorbed into your feet and maybe even through the whole body resulting in knee, ankle or back unilinement. I propose that there should be inserts specially made for pointe shoes: One that supports, isolates, protects, and possibly even extend the life of an average pointe shoe. I suggest the inserts to be made of Sorbothane. Sorbothane is a shock absorbing, highly damped, visco-elastic polymer. The visco-elastic trait allows the polymer ,Sorbothane, to shape to your foot and provide support and comfort in the right places. Viscoelasticity is a property materials that display both elastic and viscous characteristics when stress is applied. The application of stress for a short time will cause temporary deformation. Thus, retaining the shape of your foot as long as you wear them to insure comfort. I believe that this will not only be more comfortable but, having the sorbothane inserts could reduce the chances of bunions or other bone issues and can it prevent the chances of rubbing thus, resulting in less blisters, ingrown toe nails and maybe even extend the life of the pointe shoes. The reason I say that the pointe shoes could be used for a longer than before is because there would be less “wear and tear”. I really appreciate you taking time out of your busy day to read this proposal. I would greatly appreciate if you were to share your thoughts on my letter. Sincerely, Rowan Megann Woodford |
Hello I am Rowan Woodford, a passionate dancer. I know how uncomfortable dance shoes can be, especially pointe shoes. If pointe aren’t measured specially for the dance, the dancer will experience disastrous results. The outcome of landing a grande jeté , sissonne, soubresaut, etc. wrong could send an adverse shock up through the body. The shock would be absorbed into your feet and maybe even through the whole body resulting in knee, ankle or back unalignment. “Previous studies have reported injury incidence rates of 67% to 95% among professional ballet dancers and 17% to 24% in modern dancers” (Kadel, Nancy J. Foot and Ankle Injuries in Dance. 2006.) To insure comfort and safety I propose that the Pointe shoe should be lined with a Shock absorbing, highly damped and visco-elastic polymer; such as Sorbothane. The characteristics of this polymer is exactly what dancers need to stay safe and keep the ballet looking effortless while defying the laws of physics.
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