How does a catalyst in the form of a metal ion affect the rate of reaction in an iodide clock reaction with potassium peroxydisulphate ions? Background When peroxydisulfate ions (S2O82-) react with iodide ions (I-) in the presence of a starch indicator‚ they produce a dark blue solution. Reaction (1) S2O82- + 3I- I3- + 2 SO42- (peroxydisulfate ion) (iodide ion) (iodine ion) (sulfate ion) To determine the rate law for this reaction a series of changes
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My Invention would be a way to keep children and surfers completely safe in water activities in the pool and the ocean. My product name is the magic bubble. What the target market is parents and experienced surfers. The product also has much potential to be marketed not only in the US but throughout the entire world. The Magic Bubble is built within a wet suit that is linked to a tube with string that can pulled at anytime that fills the back of the suit with a pocket of air that would potentially
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Analysis The 13 Clocks is a fairy tale told by a twentieth century author. Its themes are clearly statements about the moral concerns of the time and perhaps are intended more for adults than for children‚ even though James Thurber used the form of a child’s story. One of the story’s meanings is that a true life is in a way being like a child. Adults responded to Thurber’s message: The book sold well‚ going into nine printings. Thurber had earlier written fairy tales for children as well as
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"Propeller Clock" Mechanically Scanned LED Clock Seven light emitting diodes spin‚ giving the illusion of numbers in the air An Overview: Top View Side View How this clock works: A motor spins the "propeller"‚ and a small microprocessor keeps track of time and changes the pattern on seven LEDs with exact timing to simulate a 7 by 30 array of LEDs. It is an illusion‚ but it works nicely. To build this clock‚ few things are needed‚ including: 1. Skill with motors and mechanical
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How a Pendulum Works Isaac Olson Mitch Koebnick‚ Kyle Orr 13 September 2013 A Period Purpose There are three purposes of this experiment. The first purpose is to determine the relationship of the period and the amplitude of the pendulum. The second purpose is to determine the relationship of the period and the mass of the pendulum. The final‚ but most certainly not the least‚ purpose of this experiment is to determine the relationship of the period and the length of the pendulum. Procedure
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is to study the period of the pendulum with different masses. Secondly to also study the relationship in the different lengths of the string and how it affects the period. Thirdly to find the different (time) periods in the changes in the arc size. Theory If the pendulum is set ‚ the force of the motion is used to swing back and forth . where the t period is the time the pendulum takes to complete a cycle of oscillation. As t-1/f the complete distance of the pendulum and its mass is finished ‚ the
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The Pit and the Pendulum There are some stories‚ where the objects that are described or portrayed play a more important part of the story than what we believed. In The Pit and the Pendulum‚ a short story written by Edgar Allan Poe there is certain symbolism that adds meaning to the story. The narrator is telling the story from a dungeon in Toledo‚ Spain as a prisoner during the Spanish Inquisition. In the story‚ there are certain objects that have important symbolism for the drama‚ since they lead
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PROPELLER CLOCK OBJECTIVE :- In this project‚ our aim is to use PIC or 8051 microcontroller to control a row of LEDs to function it as a clock. ABSTRACT :- The Propeller Clock is an electronic device which has a series of LEDs on board that rotate with the help of a motor to give an illusion of a watching a clock ( Digital or Analogue ). This requires a DC motor which rotates the PCB connected to it with sufficient speed so as to create the illusion. The LEDs are connected to a microcontroller
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Design of an LQG controller for two inverted pendulums Objective: The objective of this paper is to design linear quadratic controllers for a system with two inverted pendulums on 2-d Plane. To this goal‚ it has to be determined which control strategy delivers better performance with respect to pendulum’s angle and the cart’s position. The inverted pendulums represents a challenging control problem‚ since it continually moves toward
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The Pit and the Pendulum by Edgar Allen Poe‚ and The Lowest Animal by Mark Twain have many differences but one central theme. They both express the belief that the human race can be destructive. Both stories have very different settings. Poe’s story The Pit and the Pendulum takes place in a completely pitch black room. From lines 102 - 103 the narrator says‚ “the blackness of eternal night encompassed me”(pg.252). The narrator wakes up and tries to navigate and almost falls in a pit. He was put
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