Homework #2 1. How many electrons would a typical neon element have? How many electrons does a typical lithium element have? Use that information to qualitatively describe the difference between the emission spectrum of neon and lithium. 10‚ 3‚ the greater the number of electrons the greater the number of emission lines on the spectrum 2. The dominant element present in the star’s spectrum to the right: Hydrogen 3. Is a toaster oven filament an example of an emission‚ absorption
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BATTERIES What is a battery? A battery is a container consisting of one or more cells carrying an electric charge and used as a source of power. SECONDARY BATTERIES * rechargeable * high cost (short-term) low cost (long-term) * used in objects with high energy requirements: e.g. mobile phones‚ power tools * require special handling‚ containment & disposal * limited interchangeability * long life time * produce smaller amount of waste (flat discharge curve)
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Lithium Man 7 looks like a AAA battery and weighs 7 amu. He is silver colored with a red and yellow cape that has the number 3 on it. His best friend is Lithium Man 6‚ who looks exactly like him but a little bit thinner. They both live on 152nd street in Lithos City. Lithium Man 7 lives in house 2‚447. Lithium Man 6 lives in house 1‚817. Lithium Man 6 and 7 are both .534 meters tall. Lithium Man 6 and 7 are 199 years old. They can’t be in the water very long or they will dissolve into lithium hydroxide
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Make a Battery from Potato Introduction: Batteries generate electricity through a chemical reaction between two different electrodes and one electrolyte. Use of Copper and Zinc electrodes and Sulfuric acid as electrolyte is a proven method for this process. We are wondering if we can use any other liquid as electrolyte? This gave us the idea of using a potato as electrolyte. After all a fresh potato has a lot of juice that may serve our purpose as electrolyte. Problem: Can Potato be used
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Potato Batteries: Veggie power! Data and Analysis Background The battery was invented around 1800 by Alessandro Volta in Italy. It has become an indispensable part of modern life. Why are batteries so useful? Because they convert chemical energy into electrical energy. You can use this electrical energy to light a flashlight‚ to start a car‚ or to listen to your favorite music. We made a simple battery out of a potato by placing in it a zinc strip and a copper strip. At the zinc strip‚ the
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Potato Battery Lois Fruen and Chelen Johnson Topic Construction of a battery Time 45 minutes to 1 hour Safety ! Please click on the safety icon to view the safety precautions. Adult supervision is necessary for the soldering of the alligator clips to the wire and when taking apart the battery. Dispose of the potatoes
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24 IEEE JOURNAL ON EMERGING AND SELECTED TOPICS IN CIRCUITS AND SYSTEMS‚ VOL. 2‚ NO. 1‚ MARCH 2012 Design Optimization and Implementation for RF Energy Harvesting Circuits Prusayon Nintanavongsa‚ Student Member‚ IEEE‚ Ufuk Muncuk‚ David Richard Lewis‚ and Kaushik Roy Chowdhury‚ Member‚ IEEE Abstract—A new design for an energy harvesting device is proposed in this paper‚ which enables scavenging energy from radiofrequency (RF) electromagnetic waves. Compared to common alternative energy sources
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SMART MATERIALS 1. Introduction The primary characteristic of a ‘‘smart material’’ is that it has the ability to respond to external stimuli in a technically useful and technically controlled way. The words ‘‘technically useful’’ and ‘‘technically controlled’’ are emphasized since all materials respond to external stimuli of some sort or other (as a simple example‚ all materials respond to temperature by changing their volume)‚ however‚ to be considered a ‘‘smart material’’ the response must
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Project Title: Fruits and vegetables have voltage? Problem & Purpose: The purpose of the experiment is to understand how battery works and find out which fruit and vegetables that we eat can be used as an alternative way for a battery source. I become interested on seeing how batteries where used to power up my flash light and toys.
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Batteries‚ Resistance and Current “Battery-Resistor”: Check “show battery” and “show cores”‚ watch what happens‚ adjust some variables 1. Why do electrons (blue dots) move? Draw a diagram of the battery‚ label the flow of electrons. The flow of current (+) is opposite; draw this and note if toward or away from + terminal of the battery. The blue dots indicating the electrons move because there is a voltage across the battery in which the electrons flow away from the positive terminal
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