with a few watts of output power to very large power plant devices providing gigawatts of power. The electric generator animation below demonstrates an example on how a generator works to produce energy. Two black arrows show the direction of the coil rotation. The blue lines represent magnetic field directed from north pole to south pole. The red arrows show the instantaneous direction of the induced AC current. Please wait a few seconds while the applet is loading (during which your browser
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unfortunately my family out numbers me. First we gather about 8 tomatoes and boil them. Once they are done‚ we strain them put them in the blender along with small chopped up pieces of onions‚ a couple of pinches of cumin‚ half a clove of garlic‚ a pinch of oregano‚ and about four pinches of salt or to your taste. Once we have put all the ingredients in the blender‚ we mix everything and pour it into a pan with a drop of oil. We let it sit for a couple of minutes‚ when the sauce starts to thicken‚ we add a drop
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disease caused by any one of four closely related viruses that do not provide cross-protective immunity; a person can be infected as many as four times‚ once with each serotype. Dengue viruses are transmitted from person to person by the Aedes aegypti mosquito in the domestic environment. Periodic epidemics have occurred in the Western Hemisphere for over 200 years. In the past 20 years‚ however‚ dengue transmission and frequency of epidemics have increased greatly in most tropical countries of the American
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1 Electromagnetic Induction: Faraday’s Law OBJECTIVE: To understand how changing magnetic fields can produce electric currents. To examine Lenz’s Law and the derivative form of Faraday’s Law. EQUIPMENT: Circular Coils apparatus‚ PC sound card‚ FFTScope‚ magnet ‚ paper clip‚ cables‚ small (magnetic) compass‚ paper clip‚ multimeter w/long cable INTRODUCTION: Have you ever wondered how a telephone works? You may recall (perhaps in middle school or high school) that sound waves from your voice are converted
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enhanced greatly by winding the conductor into a coil. The effect proved to be two-way: If a conductor‚ maybe in the form of a coil was placed in a changing magnetic field‚ a current could be made to flow in it; this is called induction. So imagine a coil‚ and imagine that we apply a voltage to it. As current starts to flow‚ a magnetic field is created. But this means that our coil is in a changing magnetic field‚ and this induces a current in the coil. The induced current runs contrary to the applied
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the wire‚ wrap the wire tightly and neatly around the marker 30 times. 2. Slide the coil you made off of the marker. 3. Wrap each loose end of the wire around the coil a few times to hold it together‚ then point the wires away from the loop‚ as shown: 4. 5. What is this? What is its purpose? 4. Ask an adult to use the hobby knife to help you remove the top-half of the wire insulation on each free end of the coil. The exposed wire should be facing the same direction on both sides. Why do you think
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cell isolated from larvae or human sera. 2. Incubation very depending of phase of virus. 3. Acute-phase and convalescent phase serum samples. III. What is the epidemiology for this disease? Who gets the disease? How common is it? A. Mosquito borne viral disease 1. Originated in monkeys then being spread to humans. 2. Etiology of dengue was established by 1940s. 3. Dengue shock syndrome and Dengue hemorraghic fever (separate disease). B. Western Hemisphere‚ outbreak in Hawaii
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also known as breakbone fever‚ is a mosquito-borne tropical disease caused by the dengue virus. Dengue becomes a major international public health concern. Dengue is found in tropical and sub-tropical regions around the world‚ predominantly in urban and semi-urban area. The World Health Organization (WHO) estimates there may be 50-100 million dengue infections globally every year‚ with two-fifths of the world population‚ or 2.5 billion people‚ at risk of this mosquito-borne infectious disease. Dengue
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Zika virus is a disease spread to people mainly through a mosquito bite. The mosquito has to be infected with Aedes Species. Aedes Species is the main character that spreads the virus that causes Zika. Usually the mosquito that carries the virus is a female. There are a number of symptoms involved with the disease. For example some common symptoms are a fever‚ rash‚ joint pain and red eyes. This is a mild illness where the symptoms can last for several days to a week after the initial bite. If you
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that was used to locate the magnetic field lines around a bar magnet‚ a solenoid and then a pair of Helmholtz coils. As a result of these trials‚ our observations found evidence that magnetic field lines go from a north magnetic pole to a south magnetic pole. These results were seen in all three magnetic devices. When determining the magnitude of the electric field in the Helmholtz coils‚ the α value was experimentally determined to be 8.522×10-4 T/A and this value differed by 9.378% from the expected
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