Zinc‚ copper‚ and lead are three of the most common heavy metals released from road travel‚ accounting for at least 90 of the total metals in road runoff. Lead concentrations‚ however‚ consistently have been decreasing since leaded gasoline was discontinued. Smaller amounts of many other metals‚ such as nickel and cadmium‚ are also found in road runoff and exhaust. About half of the zinc and copper contribution to the environment from urbanization is from automobiles. Brakes release copper‚ while
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Title : WORK INSTRUCTION OF VALVE REPAIR AND REFURBISH FOR BTE 16” CLASS 1500-SF CILIPADI VALVE Prepared by: Reviewed by: Approved by: Reviewed by: (SSB 1) Reviewed by: (SSB 2) Sign: Name: Position/Indicator: Date: Repair and Refurbish of Pipeline Valves 1 Scope This recommended practice (RP)provides guidelines for the repair and refurbish of steel ball‚ check‚ gate‚ and plug valves normally use in pipeline applications
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loops and the current intensity‚ affect the strength of the magnetic field of an electromagnet. Materials: Power pack‚ 4 connecting wires‚ switch‚ ammeter‚ paperclips‚ iron nail‚ copper wire. PART A: TESTING THE NUMBER OF LOOPS Procedure: 1. Create an electromagnet made of an iron nail with 5 loops of copper wire around it. 2. Draw a circuit diagram including the components in the materials list above‚ except the paperclips. 3. Build the circuit you drew in step 2‚ making sure all
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diameters and lengths of the two metal cylinders and the copper wire (ii) Determination of mass of same (iii) Computation of densities of the cylinders and comparison with the acceptable values. Materials used Equiptment 1. Triple- beam balance 2. Vernier Caliper 3. Micrometer 4. Electronic balance (to measure mass of copper wire) 5. A ruler (inches and centimeters) 6. Graduated Cylinder 7. A roll of copper wire. 8. Wire Cutter 9. Irregular object (lead‚
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coating a metal object with a thin layer of another metal by means of electrolysis. 2) What is Copper Plating? Copper plating is a coating of copper metal on another material‚ often other metals. Plating is designed to increase durability‚ strength‚ or visual appeal‚ and copper plating specifically is often used to improve heat and electrical conductivity. 3) What are the uses of electro-plating/copper plating? Electroplating is used to give metal objects a better appearance or to protect them
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1) TO STUDY THE VARIATION OF RESISTANCE WITH THE NATURE OF MATERIAL For this Nichrome and copper wires of same length (1m) and area of cross section(0.5mm) are taken. One of them (say nichrome) is connected in the circuit and the rheostat is adjusted to get a voltage(V) in the circuit. The corresponding ammeter reading(I) is noted and the ratio V/I=R is calculated. The procedure is repeated for different values of voltage
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Chalcopyrite was the mineral upon which Bronze Age civilizations were built. Within the last century‚ it also became the mineral foundation for our modern electrical age. Our primary source of copper‚ chalcopyrite’s name comes from the Greek words ‘chalkos’ and ‘pyrites’‚ which respectively mean ‘copper’ and ‘striking fire’. With its metallic luster and bright golden color‚ chalcopyrite can fool people into thinking it is gold. It is one of two minerals‚ the other being pyrite‚ that are commonly
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Compound Katie Sanders Science Block 3 February 29‚ 2012 Title: Analysis of a Hydrated Crystalline Compound Purpose: The purpose of our experiment was to determine the amount of water in copper sulfate pentahydrate expressed as a percent. Hypothesis: I think that bluestone crystals are 20% water‚ because it’s called pentahydrate (penta means five) and 1/5 of 100 (since it’s expressed as a percent) is 20‚ so I think bluestone crystals
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chemical change? Answer: The potassium nitrate and the ammounuiam hydroxide had a chemical change. It started bubbling and getting really foggy. The calcium nitrate and ammonuiam hydroxide did nothing. It’s all clear still‚ but no chemical change. The copper nitrate and ammonuiam hydroxide turned a bluish color so that had a chemical change. (5 points) Score 2. For each metal that participated in a chemical change‚ write the type of metal it is‚ based on your examination of the periodic table. Answer:
Free Chemistry Chemical element Zinc
Finding the percentage of copper in brass alloy. Introduction This is an investigation to find out how much copper is in a brass alloy. The brass alloy we are experimenting on is called Muntz Metal. Muntz metal is 60% copper‚ 40% zinc and a hint of copper [http://en.wikipedia.org/wiki/Muntz_metal] (accessed 4/10/12). Muntz metal was developed as an alternative to expensive‚ heavy copper. It is comprised of about 60% copper and about 40% zinc‚ with a small amount of iron. The finished product actually
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