...backpack so he could sit in the seat across from me. I apologized for not being able to hear him due to the loud music blasting through my earphones. After moving my bag, I close my eyes again while the sounds of the music fill my head and all the stress disappears. A few seconds later the train comes to a sudden stop making everyone jerk forward. I remove my earphones; everyone is questioning what is going on. The train conductor makes an announcement from the loudspeaker ensuring us that everything is fine and to remain in our seats while the train is started back up. I put my earphones back in since clearly they are just going through technical difficulties. Listening to my music once again, trying to remove all my problems, I feel a small rumble under my feet. My eyes shoot up I look around to see if anyone else felt it, no one is acting out of the ordinary so I ensure myself that it was nothing. I close my eyes, yet again, to try to enjoy my music. A few seconds later the floor really begins to rumble and shake. While people start panicking the conductor makes another announcement, Philadelphia Pennsylvania is undergoing its...
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...of two parts, a tone generator and a probe. These are sometimes referred to as a fox and hound wire tracer. With a standard jack, you connect to the cable the unit that transmits a signal, or, with an alligator clip, you connect the unit to an individual wire. The other unit is an inductive amplifier, which is a pen like probe that emits an audible tone when touched to the other end of the conductor. Tone generators are most often used to locate a specific connection in a punch-down block. Using a tone generator is extremely time-consuming and it is nearly as prone to errors as the cable installation. Time-Domain Reflectometers A TDR is the primary tool used to determine the length of a copper cable and to locate the impedance variations that are caused by opens, shorts, damaged cables, and interference with other systems. There are two basic types of TDRs available: those that display their results as a waveform on an LCD screen and those that use a numeric readout to indicate the distance to source of impedance. You can use a TDR to test any kind of cable the uses metallic conductors. A high quality TDR can detect a...
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...KISII UNIVERSITY PROJECT REPORT TOPIC: PROJECT: COURSE: COURSE CODE: NAME: JAMES KARIUKI NJIRU REG/NO: ED 15/00016/12 SCHOOL: KARI D.E.B PRIMARY SCHOOL ADDRESS: P.O BOX 4042- KISII PERIOD: JANUARY – APRIL 2015 PROJECT FOR KARI D.E.B PRIMARY SCHOOL ECDE SECTION SUBMITTED IN PARTIAL FULFILMENT OF REQUIREMENT FOR THE AWARD OF BACHELOR OF EDUCATION ARTS (ECDE) AT KISII UNIVERSITY. DECLARATION I declare that this piece of work is authentic and it has not been done before or presented to any institution for examination. No part of this project should be produced without prior permission. However, any alteration to improve its efficiency and effectiveness by another scholar is allowed. DEDICATION I wholeheartedly dedicate this piece of work to Early Childhood Development and Education (ECDE) managers and teachers. ACKNOWLEDGEMENT I wish to acknowledge the efforts of various individuals owing to the success of this project. First, I am much grateful to the Head-teacher of Kari D.E.B Primary school-Mr. Ondimu for his monetary support together with the head of ECDE Department Madam Rhoda. Others who were handy in the success of the project were Mr. Suleiman Thano (a student teacher from Kisii University) really assisted me in the organization of the project. ECDE section pupils were also of great help during...
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...EVKET WLI-90 EVTT3F EVTS BHVSD HVTEB HVS2C ALPHABETICAL INDEX Type Page Type Page Type Page 21 ............................................................ 32 22 ............................................................ 31 AFGS ...................................................... 73 BHVSD ................................................... 57 BHVSF.................................................... 56 CCL-EHV .................................................. 6 CCLS-EHV................................................ 7 EVBCF.................................................... 45 EVBETSH ............................................... 54 EVDCH ................................................... 41 EVDCS.................................................... 39 EVEDST.................................................. 63 EVEDST-90 ............................................. 65 EVEF-D................................................... 84 EVETF .................................................... 15 EVETS .................................................... 49 EVHS ...................................................... 82 EVIS........................................................ 53 EVKES.................................................... 48 EVKET .................................................... 14 EVLCF ...................................................... 4 EVPC ...................................................... 81 EVS2C ......................
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...Renee Montaque 1.2 M2 Why copper is used in electrical cables Mobiles have lots of different metals in them for example, Copper is used for electrical circuits and they are good conductors. Silver is used for switches on a circuit board and phone buttons because it's a really great conductor. Gold is used for the surface of the circuit board and a connector. Tantalum is used in electronic components and it allows scientists to make small mobiles and phones have palladium, aluminium and iron in them too. Copper combines several propeties that have traditionally made it preferred for most electrical wiring. Copper is a good electrical condctor, provides a good contact surfae, is ductile (is easily bent repeatedly without breaking) and it is not too expresnive. Copper wire is also relatively easy to manufaacture, and there is a lng history of using it. However, other materials can and are used for electrical wiring. Furthermore, in the future it is reasonable to ecpect that copper will fall out of favour as new and better means of conducting electricity are better developed perfected. Ref: http://wiki.answers.com/Q/Why is copper used for electrical wires Why is motor oil important for engine oil We put oil in our engines to serve several purposes. First, obviously, oil acts as a lubricant. If your engine is oprating correctluy, there is almost no metal to metal contact – everything is ridding on a thin film of oil. However, oil has several other...
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...solutions are very good conductors of electricity. Metals with higher numbers of delocalized electrons have higher conductivities than those with fewer delocalized electrons. For example, aluminium is more conductive than copper which is also more conductive than copper. When an electric current is applied to a conductor, the delocalized electrons assume a directed motion depending on the polarity of the potential difference. As the electrons move, they collide and bombard with atoms and molecules of the conducting material, thereby creating heat (T. B. Theraja). Materials which offer higher hindrance to the flow of electrons on application of a potential difference are called poor conductors of electricity. Examples of poor conductors are: Polyvinyl chloride (PVC), dry wood, rubber, glass and mica. Insulators are used in the coating of conductors to prevent electrical shocks .Resistance is measured in ohms denoted Ω. Depending on the degree of resistances other commonly used units are; mega-ohms (M Ω), kilo-ohms (k Ω), mill-ohms (m Ω) and micro-ohms (μ Ω) (T. B. Theraja). Resistance of a material is derived from the factors affecting it. According to the laws of resistance, resistance is directly proportional to length, l, and inversely proportional to the cross-sectional area of the conductor. It also depends on the nature of the material and the temperature of the material. Thus resistance of a conductor is given by: R= ρlA ρ is the resistivity of the conductor material, l is the...
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...Contents I. Abstract: 2 II. Question 1 3 III. Question 2 3 A. Normal Incidence 3 B. Oblique Incidence 5 1. Perpendicular Polarization 5 2. Parallel Polarization 12 IV. Question 3: 17 A. Cost of conducting Material 18 B. Mass of conducting Material 18 C. Volume of Conducting Material 19 V. Conclusion: 19 Abstract: The purpose of this project is to design a shielded room. The room should be built in a way so that high-frequency waves cannot penetrate into the room. The material that should be used are nonconducting, nonmagnetic material with a thin coating of conducting material on the outer surface. The conducting layers that can be used are made of aluminum, copper, mu-metal, or conducting polymer. Frequency=10 MHz ω=2∙π∙f=2∙π∙(10× 〖10〗^6 )=62.83×〖10〗^7 [rad⁄s] The shielded room must reduce the electric field intensity by a factor of 〖10〗^6 There are different cases other than the material we should consider, we should also consider the type of incidence the electric field is at, and for that we have a couple of different cases which include: Normal Incidence Oblique incidence (sub divided into) Parallel polarization. Perpendicular polarization Question 1 Using professional sources (the book) we obtained the conductivity, permeability, cost, and density of the following four materials Table 1: Table of values Material Conductivity [σ] Permeability [μ] Density [kg/m^3] Cost [Unit/Kg] Aluminum 3.6 × 〖10〗^7 µ0 2700 1.5 Copper 5.7 × 〖10〗^7 µ0...
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...Non-thermal E ffect of M icrowave on the Conduction C haracteristics of Na C l Solution Shaoquan Hou Deli Li (Instructor) Mengxiao Li Shanghai High School Non-thermal E ffect of M icrowave on the Conduction C haracteristics of Na C l Solution Shaoquan Hou Deli Li(Instructor) Mengxiao Li Shanghai High School A bstract: Using the household microwave oven, we studied the effects that microwave has on the conductivity of NaCl solution. We compared the currents of NaCl solution under the microwave irradiation with the one under non-microwave irradiation under the same temperature. To our surprise, the values are different. We consider this is one of the non-thermal effects of microwave on the electrolyte solution. Further experiments indicate that the current change caused by this non-thermal effect is closely related to the concentration and temperature of the solution. Through real-time observations on the current change, we eliminated that the non-thermal effect is caused by the redistribution of the positive and negative ions. Thus the experiment results suggest that the non-thermal effect of microwave is caused by the change of the surrounding environment of the ions. K eywords : Microwave, non-thermal effect of microwave, electrolyte solution The affects the microwave has on substances or organisms which cannot be explained by thermal effect is called non-thermal effect of microwave...
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...convenient cost for the 100 or 1000 of km the lines regularly installed. It is vital that appropriate environmental protection is provided. This is achieved through specifying a thermal expansion limit, corrosion resistance and apt wind resistance for the cables. Numerous varieties of cable specifications are offered to meet the demands for distinct currents and satisfy British Standards. High Voltage Cable Conductors: A Comparison Introduction As copper was the first material to be used in this capacity and aluminium is the most commonly used material used today I have decided to compare these two materials. Conductor Material Properties Materials usually used in conductors are aluminium, copper, and steel. Steel wires are joint with aluminium in the most frequent type of overhead conductor. Aluminium Conductor Steel Reinforced (ACSR). The use of copper is unusual in modern transmission lines since it weighs and generally costs considerably more than aluminium conductor of the same resistance. Copper was the metal first used for conductors during the great development of electrical engineering in the early 1880’s. However, the immediate rapid expansion of the aluminium industry soon reduced the price of aluminium. For overhead transmission lines,...
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...TABLE OF CONTENTS Chapter Title Page Page No 1 INTRODUCTION 01 1.1 INTRODUCTION ABOUT THE STUDY 02 1.2 INDUSTRY PROFILE 03 1.3 COMPANY PROFILE 05 2 RESEARCH METHODOLODY 06 2.1 OBJECTIVES OF THE STUDY 07 2.2 SCOPE OF THE STUDY 10 2.3 TOOLS FOR ANALYSIS 16 2.4 PERIOD OF THE STUDY 35 2.5 LIMITATIONS OF THE STUDY 53 3 DEPARTMENT PROFILE 57 4 SWOT ANALYSIS 59 5 FINDINGS SUGGESTIONS AND CONCLUSIONS 5.1 FINDINGS 5.2 SUGGESTIONS 5.3 CONCLUSIONS APPENDIX BIBLIOGRAPHY 1. INTRODUCTION 1. INTRODUCTION Organizations play major role all over the world. Different organizations meet people needs and provide them with product, service or both. Due to globalization the world has become a global village. This has very much helped people to get their needs. Different firm play different roles and it has its own importance. The company which I have chooses for the organization study is TRACO CABLE Company. It is a well developed company fully owned by the State Government of Kerala. TRACO CABLE Company produces different kinds of cables for different users. They produce power cables and telephone cables, which are mainly consumed by the Kerala State Electricity Board and Bharat Sanchar Nigam Limited. The products are utilized for the welfare of the public. These products are not directly consumed by the public. The...
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...of two parts, a tone generator and a probe. These are sometimes referred to as a fox and hound wire tracer. With a standard jack, you connect to the cable the unit that transmits a signal, or, with an alligator clip, you connect the unit to an individual wire. The other unit is an inductive amplifier, which is a pen like probe that emits an audible tone when touched to the other end of the conductor. Tone generators are most often used to locate a specific connection in a punch-down block. Using a tone generator is extremely time-consuming and it is nearly as prone to errors as the cable installation. Time-Domain Reflectometers A TDR is the primary tool used to determine the length of a copper cable and to locate the impedance variations that are caused by opens, shorts, damaged cables, and interference with other systems. There are two basic types of TDRs available: those that display their results as a waveform on an LCD screen and those that use a numeric readout to indicate the distance to source of impedance. You can use a TDR to test any kind of cable the uses metallic conductors. A high quality TDR can detect a large variety of cable faults,...
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...Please explain with a detailed solution. Your response- Question 3: Doubt: How concentration become 8 times if volume is half and concentration is doubled? Your response- Question 4: Doubt: Please give solution if same is in acidic medium. Your response- Question 5: Doubt: Why is SnCl4 more covalent than all others? Your response- Question 6: Doubt: Electrical neutrality should be there, so answer should be 14. Please explain me how the answer is 13? Your response- Question 7: Doubt: Why not the answer is ZnS and Ag2S? Your response- Question 8: Doubt: How option B is correct? Please give proper explanation. Your response- Question 9: Doubt: Option d is also right as LiCl is covalent in nature, hence it should be a poor conductor of electricity in molten state. Your response- Question 10: Doubt: The JEE Main have officially claimed that the answer for this question is option "B", i.e., Group 17 and period 6. Can you please re-confirm, as I need to challenge the same since I had also opted for the same answer as mention by you. Your response-...
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...DANGERS OF ELECTRICITY DANGERS OF ELECTRICITY What are the dangers of electricity? According to: Acceleratedstudynotes. (2012, 03 10). Danger of electricity. Retrieved from https://www.acceleratedstudynotes.com/2012/03/10/igcse-coordinated-science-dangers-of-electricity/ Dangers of Electricity contain a range of risks, which are Electric Shock, Psychological Damage, Physical Burns, Neurological Damage and Ventricular fibrillation resulting in death. If not properly controlled or harnessed, can result in serious danger to those who use it. The risks with electric power can be divided into two categories: direct and indirect. The direct danger is the damage that the power itself can do to the human body, such as enabling someone to breathe or regular heartbeats, or burns. The indirect dangers of electricity include the damages that can result to the human body like something caused by electric shock, an explosion, or a fire. Electricity at any voltage can be dangerous and should always be handled with caution. An electric shock can occur upon contact of a human or animal body with any source of voltage high enough to cause enough current flow through the muscles or nerves. Dangers of an over heating cable: Sometimes another danger can begin if an extreme current flows in the wires. They will heat up and the insulation can melt which will cause it to produce poisonous fumes or even catch fire. Therefore it is advice to avoid using appliances that draw too...
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...Have you ever wanted to know how it felt to be a slave? In the story, from Harriet Tubman: Conductor on the Underground Railroad by Ann Petry, it conveys the life of a slave better than The People Could Fly because it shows their troubles and good times as well as their teamwork and discouragement adequately better. In the story from Harriet Tubman: Conductor from the Underground Railroad by Ann Petry conveys the life of a slave better than The People could Fly because it shows their troubles and good times. According to the text, “She turned away from the house, frowning,”(Petry, p. 489). This shows that Tubman and her group went through times of troubles that were unexpected making them even worse to deal with. Without the food and warmth she promised she felt like she let herself and her group down. Later Tubman her group went threw good times due to help from other abolitionists. Secondly, it states in the text, “Say the...
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...Leadership is a great trait to have, but what characteristics indicate that someone is a good leader? Right before the Civil War, President Lincoln was elected for office, which made many slave owners angry because they knew Lincoln’s goal was to emancipate all slaves. This war was a long struggle but there were many strong leaders willing to fight it. When someone thinks of leadership, usually a tough, strong-opinioned and put together kind of person. While reading “Harriet Tubman: Conductor on the Underground Railroad” these traits fit Harriet Tubman perfectly. Tubman wanted to make a change to the world by trying to free slaves, which was a huge risk because if she was to get caught, she would be killed. Being a risk taker is a trait that...
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