ELECTRICITY HOTS Questions for Practice 1. Name a substance whose resistance almost remains unchanged by increase of temperature. 2. Name two special characteristics of heater coil. 3. A wire of resistance 4 ohms is bent to form a circle. What is the resistance between two diametrically opposite ends? 4. How does the resistance of a conductor change if its temperature is increased? 5. A current of 4A flows in a wire of resistance 60 ohms. Calculate electrical energy consumed in 2 minutes. 6. V-I
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Chemistry December 14‚ 2010 Conductivity of Ionic solutions Introduction This lab report is about the conductivity of ionic solutions. In class we have been discussing wether all ionic solutions conduct equally well. If an solvent solution conducts electricity‚ then it must contain ions. So measuring the conductance of solutions can tell you whether the solutes in the solution are dissociated into ions. (Conductivity) Any type of solution‚ even ionic solutions‚ provide resistance to the flow of current
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Man on Wire is a documentary about a goal oriented‚ thrill seeker that made history and created a masterpiece on a metal wire 110 stories above the streets of New York City. Philippe Petit had a dream to walk on a wire that was strung between the World Trade Centers. To make this happen it would take many years of planning‚ practice‚ and persistence. As we follow Petit through his journey‚ it becomes evident that he may not be able to achieve his goal. Director James Marsh allows tension to rise
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What factors affect the resistance of a piece of wire? What I am going to investigate is‚ what factors affect the resistance of a piece of wire. To start this experiment I will need the following equipments: Power pack Ammeter Voltmeter 1 meter ruler (100cm) 110cm of wire Crocodile clips This shows how the equipment will be set up. A V I will measure the Voltage and also Current of the wire. Once I have recorded the results
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their lives and throw you away when they don’t need you anymore. Philippe Petit‚ the main character of the documentary film “Man on Wire”‚ directed by James Marsh‚ is a great example of such a sucker. Barry Greenhouse‚ Petit’s accomplice‚ says it during the film‚ “He sort of draws you into his world.” Philippe was a brave‚ enthusiastic and persistent high-wire artist. His raw passion to walk hundreds of feet above the ground on a tightrope helped him to make his dream come true‚ and he became
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I predict that as I increase the temperature‚ the distance moved by the meniscus will also increase. I believe this will happen as aerobic respiration is taking place. This is respiration involving the consumption of oxygen gas‚ producing carbon dioxide and water‚ as shown below. C6H12O6 + 6O2 --> 6CO2 + 6H2O + 36ATP This process allows energy to be produced in the form of ATP‚ Adenosine Triose Phosphate. This occurs by converting glucose into pyruvate via glycolysis. Pyruvate is then transported
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Copper was the first metal that is used by humans as weapons and tools. It is shinny and has a reddish brown color. It’s application toward humans has really changed the way we live. Copper is an excellent conductor of electricity‚ which is often used as electrical wires or cables in generators‚ motors and electric products. In addition‚ it is also an outstanding conductor of heat‚ which is used in radiators and heating systems. Since it does not react with water and corrode easily‚ it is widely
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LET’S START WITH COPPER CHEMISTRY REPORT 2012 INTRODUCTION: The law of conservation of mass means that the atoms of an object cannot be created or destroyed‚ but can be moved around and be changed into different particles. This law says that when a chemical reaction makes two different atoms into a new product‚ the mass will be the same. Knowing this the mass of the copper should be the same at the beginning and at the end of the experiment. In this investigation we will see
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8 1 EXPERIMENTAL DATA Table 1: Coordinate of Pressure Tapping Tapping No. 1 2 3 4 5 6 7 8 9 10 11 Note: Table 2: Pressure Readings Manometer inclination: Pressure Readings Pitot Pressure Static Pressure Atmospheric Pressure Atmospheric Temperature Stall angle: At the end of the experiment 474 mm 497 mm 500 mm 29°C (mm) 0.0 2.5 5.0 10 20 30 40 50 60 70 80 (mm) 0.000 3.268 4.443 5.853 7.172 7.502 7.254 6.617 5.704 4.580 3.279 0 0.025 0.049 0.098 0.197 0.295
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The effect of Length on the overall resistance of a circuit. Research question: How does the length of the conductive putty affect the over all resistance of a circuit? This experiment will be discussing how the length of the conductive putty wire affects the overall resistance of a circuit. The variables for this experiment are being used for a number of reasons‚ however one of the main reasons behind choosing this experiment is investing how length of an object is affected be the resistance. The
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