We placed the zinc inside the beaker and slowly poured the hydrochloric acid into the beaker. As soon as the acid entered the beaker, there was a sizzling sound and bubbles started to form as we add more of the substance in. When the bubbles were forming, we could see a steam of gas coming out of the beaker. After 10 minutes, we noticed bits of zinc were floating on top of the hydrochloric acid and lining the beaker. I lifted the beaker and felt the bottom and it felt warm, which meant the reaction was still happening. After 20 minutes, we added water into the zinc and hydrochloric acid to stop the reaction and we observed a slight cloudy colour (still clear) forming as we slowly pour the water in the beaker.…
Procedure: Using distilled water, premeasured containers and objects determine displacement of fluids and density of objects. Use ice and heat measure temperatures in Celsius, Fahrenheit and Kelvin.…
Experiment 1: Bromination of Acetanilide1 Precautions: Ethanol is flammable Sodium hypochlorite is an oxidizing agent and releases toxic fumes (handle in fume hood) Acetic acid is corrosive, harmful if inhaled, flammable and can cause burns (handle in fume hood) Gloves are recommended to avoid chemical contact with skin Reaction Scheme: Conversion of acetanilide to p-bromoacetanilide…
The second event was an email I got from a teacher concerning my web site Math Open Reference. She wrote (I paraphrase): "Thank you so much! Now I have something to do with those laptops they gave me!". You can visualize the scene: a school decided to move technology into the classroom so it gave the teacher the computers. Again I wondered if this school really knew why they wanted the technology. In what…
2). Make a table to record all of your data. Start measuring the diameter and circumferences of all your circular objects.…
Cannons explode in the background as men around you fall down. Everything is madness. You look into the eyes of your cousin from up North before he shoots you. Why is this happening? The Civil War, fought by the Union (the “North”) and the Confederate States of America (“the South”) took place between 1861 and 1865. Several slave states that declared secession formed the Confederacy. The issue of the war was slavery. The South depended on it and the North wanted to abolish it. So what caused this war? This paper will argue economics was the most important factor in starting the war. However Social and Political differences played a big role.…
The next morning, my mom and I drove to the wonderful Kansas City Convention Center. I smelt the luscious cool air. When we walked in, I felt the papery texture on the agt banner. We saw a bunch of people waiting for their audition. I had to sign a bunch of wavers to make sure that it was…
In “Resistance to Civil Government” Thoreau embodies the idea individual responsibility by refusing to pay taxes. Therefore, he is breaking the law but, he took this course of action due to the law violating his personal beliefs. This sets up the basis for his piece: people are morally obligated to break laws that violate their personal beliefs. He believes individuals should always rely on their own reasoning, due to the lack of morality in the highly corrupt government. The government is bound to make unjust laws because it is ruled by majority vote, not by reasoned or moral decisions. Thoreau's hope is that free-thinking individuals will take responsibility and defy government when it is making incorrect legislation.…
1. Use a ruler to draw a straight line on one side of a sheet of paper near the center, then draw a perpendicular line through the center of the first line.…
Introduction The Quantum Theory was the second of two theories which drastically changed the way we look at our physical world today, the first being Einstein's Theory of Relativity. Although both theories revolutionized the world of physics, the Quantum Theory required a period of over three decades to develop, while the Special Theory of Relativity was created in a single year. The development of the Quantum Theory began in 1887 when a German physicist, Heinrich Hertz, was testing Maxwell's Theory of Electromagnetic Waves. Hertz discovered that ultraviolet light discharged certain electrically charged metallic plates, a phenomenon that could not be explained by Maxwell's Wave Theory.…
The interferometer is the most accurate measuring device known to man. It was created by Albert A. Michelson. The operation of the interferometer described briefly is a light beam that is separated by a beam splitter. The two beams then travel equal distances at 90° of each other where they are reflected off two mirrors back through the beam splitter. They are then superimposed on to a screen. The screen will display an interference pattern of fringes. The interferometer is extremely sensitive to vibrations and should be isolated from them…
In the seventeenth century two rival theories of the nature of light were proposed, the wave theory and the corpuscular theory.…
Refraction refers to the bending of the transmitted light at the interface between two transparent materials. The angle of refraction depends on the angle of incidence and the relative speeds of the light in the two different media and can be found from the relationship…
When you use an optical instrument, whether it be something very simple like a magnifying glass, or more complicated like a telescope or microscope, you're usually trying to make things look bigger so you can more easily see fine details. One thing to remember about this is that if you want to make things look bigger, you're always going to use converging mirrors or lenses. Diverging mirrors or lenses always give smaller images.…
It all started on a brisk winter’s day. The tree tops were blowing gently in the wind and I sat outside on the porch with a friend of mine watching the trees and very faintly hearing dogs barking in the distance like they knew something was going to happen. I had been feeling slightly off all day, I wasn’t able to pin point the exact reason why, just felt a little off, so I just shrugged it off and didn’t think too deeply into it. My friend seemed to have noticed it too but didn’t make a big deal out of it. She was babbling endlessly about her relationship issues with her boyfriend and I looked at her as if I was listening, but really I wasn’t. After all, I had my own relationship issues that I was obsessing about. When she finally stopped talking to take a breath, I sipped my hot chocolate and said to her, “Wouldn’t it be something if humans were capable of time travel?” She said, “No! That’s way too scary, and very weird.” At that moment I looked up in the sky and saw a shooting star, and said, “Make a wish! Quick! I said, “I wish I was able to travel back in time.” The next thing I knew I was sitting outside on a beaten up old porch, wearing the same clothes, the same dark, brisk winter night, and still seeing the trees blowing in the gentle breeze. Something seemed different, I didn’t hear the dogs barking anymore but I thought nothing of it. I put my hot chocolate down and went in the house and everything was completely different. The house seemed older, and there were portraits on the wall of people I have never seen before. I called out my friends name and she did not answer. So I called her name louder, and still no answer. All of a sudden I hear a man’s voice in an accent that wasn’t even familiar to me, maybe Russian, say, “There you are!” I have been looking everywhere for you! Where have you been?” I thought to myself, who the heck is this? Then very excitedly he said, “Did you do the research that I asked you to do like 2…