Alps it was suggested that he was a Shepard or a hunter as he carried weapons with him * In samples taken of Otzi ’s hair‚ high levels of copper particles and arsenic were found. Scientists thought that he may have been involved in copper smelting possibly as part of his living. The copper axe that Otzi was found with was composed of 99.7 % pure copper. HOW DID OTZI DIE? When scientists were analysing new X-rays‚ they noticed a foreign item lodged in Otzi ’s left shoulder. Detailed investigations
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Colegio De San Juan De Letran-Calamba Bucal‚ Calamba City Industrial Materials and Processes Laboratory IE081L “Electrical Joints and Splices” Department 4: Manalo‚ Maria Isabel E. Rivera‚ Rachel Ann G. Berbano‚ Roy Emilino M. Rodriguez‚ Paul Andrew Trinos‚ Searle Submitted to: Engr. Gilda A. Aquino 1. Objective: To have knowledge and experience on how to Jointing and Splicing a Electrical Wire Gauge. To know the importance
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Strength of an electromagnet AIM The aim of this experiment is to investigate how the strength of an electromagnet is affected by the size of the current flowing through its coils. YOU WILL NEED A large (15cm long) iron nail A metre of insulated copper wire 6 metal paper clips A power supply (0-6V dc) An ammeter (0-5A) Connecting leads with 4mm plugs WHAT TO DO Strip off about 5 cm of the insulation from each end of the wire. Set up the apparatus as shown in the diagram. Switch on the power
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provided to you. Section A 1. 2. 3. 4. 5. 6. 7. 8. Write the chemical formula for the following: (a) Calcium Fluoride (b) Iron (II) Bromide Name to kinds of cells (elements) of xylem. Two wires‚ one of manganin and the other of copper have equal lengths and resistances. Which one of these wires will be thicker? What does ‘slaking of lime’ stand for? Why is there a hissing sound during this process? Write the chemical equation for the reaction involved. What is autonomic nervous
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the science lab. In science‚ we would participate in a lab. One of my favorite labs was the owl pellet dissection. Owl pellets are owl throw up. In owl pellets you can find the bones of animals the owl consumed. In this lab we were to take out the bones we found in the pellet and construct the animal we found inside. Most people‚ like me‚ had a sort of rodent‚ but some people found birds in their pellet. Another one of my favorite things we did in science was the Sharpie tie dye lab in fifth grade
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a. 1000Hz b. 800Hz 2. Resistance design criteria – refer to current and resistance drops in the line. Also known as signaling limit. Basic Resistance Design Basic resistance of a single rounded wire express as: R= ρLA For rounded copper wire: A= π4d2 The dc resistance is equated as: Rdc=
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Data and Observations: Part I Table: Metal: | Aluminum | Zinc | Iron | Copper | Mass of metal: | 27.776 g | 41.664 g | 34.720 g | 41.664 g | Volume of water in the calorimeter: | 26.0 mL | 26.0 mL | 26.0 mL | 26.0 mL | Initial temperature of water in calorimeter: | 25.3 °C | 25.3 °C | 25.3 °C | 25.3 °C | Temperature of hot water and metal in hot water bath: | 100.5 °C | 100.5 °C | 100.5 °C | 100.5 °C | Final temperature reached in the calorimeter: | 38.9 °C | 34.8 °C | 34.2 °C | 34
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Sugar (Sucrose)- C12H22O11 Vitamin C (Ascorbic Acid)- C6H8O6 Aspirin (Acetylsalicylic Acid)- C9H8O4 Common Name | Chemical Name | acetone | dimethyl ketone; 2-propanone (usually known as acetone) | acid potassium sulfate | potassium bisulfate - used in the conversion of tartrates to bitartrates in wine. | acid of sugar | oxalic acid – used in cleaning or bleaching‚ especially for the removal of rust (iron complexing agent) | ackey | nitric acid | alcali volatil | ammonium
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to be used as the essential outer material of the statue? Ancient Chinese‚ Greeks‚ and Romans found bronze to have a distinct advantage than other metals such as pure copper. As bronze being ninety percent copper and ten percent tin‚ the alloy had advantages such as: the difference in tensile strength bronze had compared to copper‚ and the low liquid melting point the alloy had in order to stay longer in this form for casting. The people during these times found many uses of this material‚ hence
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In this lab‚ we changed copper into various forms using different chemicals and chemical reactions. The purpose of this lab is to demonstrate that the product of a chemical reaction depends on what is present at the time of that reaction. This lab also displays how matter cannot be created nor destroyed in a chemical reaction. In a lab‚ you must always make safety a priority in case of an emergency. In our lab‚ we made sure to wear closed-toed shoes as well as goggles at all times. We also performed
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