WHICH VARIABLES AFFECT RESISTANCE‚ AND WHICH ONE HAS THE GREATEST EFFECT. BACKGROUND INFORMATION: Resistance is the force that opposes the flow of electrons in a circuit. The equation for resistance is Ω=V/A. (Ohms equals Voltage divided by amps). Resistivity is a measure of how strongly a material opposes the flow of electrical current‚ There are four main factors that affect resistance: Length – this is because the electrons would bump into more atoms‚ the longer the wire which is like using
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Arc Length The definition of radian measure s = rθ The unit circle An angle of 1 radian Proof of the theorem IT IS CONVENTIONAL to let the letter s symbolize the length of an arc‚ which is called arc length. We say in geometry that an arc "subtends" an angle θ; literally‚ "stretches under." Now the circumference of a circle is an arc length. And the ratio of the circumference to the diameter is the basis of radian measure. That ratio is the definition of π. π | = | C D | . |
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ARCELIA ARRATIA MEASUREMENT OF LENGTH‚ MASS‚ VOLUME‚ AND DENSITY PHYSICS LAB REPORT Physics is the scientific study of matter and energy and how they interact with each other. Physics utilizes the scientific formula to test hypothesis and calculate matter such as density. Tools were created to measure material in a laboratory and have been perfected to reduce error. In this experiment measurement of length‚ mass‚ volume and density will be obtained through instruments of measuring
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The edge of the cliff is 8 feet above the level of the water. The tip of his fishing rod is directly above the edge of the cliff and is 7 feet above the cliff. He lowers his fishing line so that it enters the water at the base of the cliff. The length of his fishing line‚ l‚ which is measured from the tip of his fishing rod to the place his line enters the water‚ and the angle between his line and the water‚ θ‚ are changing as the river carries his line downstream. The horizontal distance‚ r‚
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The Lengths of Leadership This Freshman Seminar displayed the power of leadership in all of its forms. There are many types of leadership skills and characteristics; however‚ they all are encompassed by a set of core values one must follow to be a leader. We explored what could be called the ten commandments of leadership during class discussion and how they applied to a series of movies including Apollo 13‚ Courage Under Fire‚ Norma Rae‚ and Cry Freedom. In each movie‚ every character showed a
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Section 1 WHAT IS HAPPENING IN THE WIRES? INTRODUCTION Electricity is usually invisible. Except for lightning and sparks‚ you never see it in daily life. However‚ light bulbs and a magnetic compass can show you when something electrical is happening. By observing their behavior and making a few assumptions‚ you can begin forming ideas about electricity. This type of thinking is called “building a model”. INVESTIGATION ONE: WHAT IS NEEDED TO LIGHT A BULB? 1.1 Activity: Lighting bulbs in a loop
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Illinois. He saw a wooden rail with nails sticking out and decided to use this to start his design of barbed wire. His wife’s garden needed protection and that started his invention process. One year later in 1874‚ the barbed wire fence was patented. Glidden became a millionaire with assets. His company‚ with partner Issac Ellwood‚ The Barb Fence Company made 10‚000 pounds of barbed wire the first year and 600‚000 pounds by 1875. When Glidden died‚ he was one of the richest people in America. Although
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Petit: Sane Wire Walker What do you think when you imagine a man walking on a wire higher than 10 stories high? A French wire walker named Philippe Petit walked over many structures from Notre Dame to Sydney‚ Australia‚ to New York. Through the things he has done‚ people may think he is crazy. However‚ Petit and I think that there is nothing crazy about what he has done. I believe the people/society thinks he is crazy. They see this man up hundreds of feet walking across a wire over famous
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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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Worldwide Wires “Revenue Recognition Woes” Introduction Worldwide Wires (“WW”) is a company that provides computer network and communications services around the globe. The company offers its services either directly to the customer or through a network of partners that are scattered around the globe. Their business model can be compared to that of a principal and an agent‚ with WW being the former and the partners being the later. The company and the partners enter into 5 year service agreements
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