Earth Batteries Dirt makes pretty good batteries. It seems like moist dirt packed tightly works the best. Add just enough water but not too much. I guess if the dirt dries up‚ you’ll have to water the batteries along with the rest of the plants. The soda can version works but I haven’t tested extensively. You don’t really have to use a penny‚ just has to be copper. Perhaps other common materials would work better. Each cell gives you a useless 0.5 volts. But if you link them in series you can
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Writing ionic equations for redox reactions You can split the ionic equation into two parts‚ and look at it from the point of view of the magnesium and of the copper(II) ions separately. This shows clearly that the magnesium has lost two electrons‚ and the copper(II) ions have gained them. These two equations are described as "electron-half-equations" or "half-equations" or "ionic-half-equations" or "half-reactions" - lots of variations all meaning exactly the same thing! Any redox reaction
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CATHODIC PROTECTION P E FRANCIS CONTENTS 1 2 3 INTRODUCTION............................................................................................................2 PRINCIPLES OF CATHODIC PROTECTION..........................................................3 METHODS OF APPLYING CATHODIC PROTECTION........................................5 3.1 3.2 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 IMPRESSED CURRENT..........................................................................................5 SACRIFICIAL
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Paint-it-Yourself Luar Martinez April 1‚2011 Eng. 111-HB1 K.L. Thomas Do you believe that things turn out right only if you do them yourself? If yes‚ well you’re in luck‚ because today I will show u how to paint your own car. The entire activity can take about five to six hour and requires a lot of precision; but it allows you to expand your creativity and even save a couple of bucks. Before even thinking about painting a car‚ you must first have dry and dust free area(carport). Also if your
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CHEMISTRY (Theory) Time allowed : 3 hours General Instructions: (i) All questions are compulsory. Maximum Marks : 70 (ii) Marks for each question are indicated against it. (iii) Question numbers 1 to 8 are very short-answer questions and carry 1 mark each. (iv) Question numbers 9 to 18 are short-answer questions and carry 2 marks each. (v) Question numbers 19 to 27 are also short-answer questions and carry 3 marks each. (vi) Question numbers 28 to 30 are long-answer questions and carry 5 marks
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Corparate Social Responsibility Background Lord Holme and Richard Watts from The World Business Council for Sustainable Development in its publication Making Good Business Sense defined Corporate Social Responsibilty as the continuing commitment by business to behave ethically and contribute to economic development while improving the quality of life of the workforce and their families as well as of the local community and society at large (Corporate Social Responsibilty 2004). UMW’s Corporate
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Theory What is rust? Rust is the common name of a compound‚ iron oxide. Iron oxide‚ the chemical Fe2O3‚ is common because iron combines very readily with oxygen -- so readily‚ in fact‚ that pure iron is only rarely found in nature. Iron (or steel) rusting is an example of corrosion -- an electrochemical process involving an anode (a piece of metal that readily gives up electrons)‚ an electrolyte (a liquid that helps electrons move) and a cathode (a piece of metal that readily accepts electrons)
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If you are looking for instructions about building a lemon battery to light an LED‚ see Lemon Battery at Wikibooks. The lemon battery is a simple type of electrical battery that is commonly made for school science projects because it illustrates a battery’s main components. Typically‚ a piece of zinc metal and a piece of copper metal are inserted into a lemon. Everyday objects such as galvanized nails and copper pennies can be used for the zinc and for the copper. A single lemon is usually studied
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Cyclic voltammograms for 50 moldm-3 catechol were recorded with plain GCE‚ PEDOT-GO‚ PEDOT-rGO and PEDOT-rGO incorporated with LAC at pH 7.0 and scan rate 50 mVs-1 Fig. 4.3.4. Fig 4.3.4A present CVs and the anodic peak current observes for dopamine are bare small redox peak was observed. The modification of PEDOT-GO and PEDOT-rGO were increase in increase in the redox reak compared with bare electrode. The incorporation of LAC on the PEDOT-rGO gives decrease in the oxidation and increase in the
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2.2 Peltier Thermoelectric cooler (TEC) Peltier thermoelectric heat pump is a popular thermoelectric energy conversion module that applies the Peltier effect‚ transferring heat energy from one side of the device to the other side. Peltier effect occurs when two different semiconductor materials (n-type and p-type) are joined together with electric current passing through its junction. Therefore‚ the junction could either be cooled or heated [28]. The Peltier TEC device can behave like a temperature
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