5(R2 – 3R1) 3. In a simple series circuit a battery is connected through an ammeter to an electric lamp. A voltmeter is connected parallel to the lamp. The ammeter reads 0.75 A and the voltmeter 50 V. What is the resistance of the lamp neglecting the current drawn by the voltmeter? If the current in the voltmeter is 0.001 A for each volt it indicates‚ what is the actual current in the lamp and the corrected value of the resistance? ➢ Without voltmeter current: R = V/I
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consumes accounts for nearly 25% electric energy‚ low carbon environmental voice is louder and louder. Nowadays‚ a high efficiency and energy saving LED lamp is gradually replacing traditional lighting into the horizon‚ according to the "New York Times" (The New York Times) report‚ if all of the use of LED lighting technology replace traditional lighting lamp‚ only save power consumption‚ can reduce 50% of carbon dioxide emissions in the world in a short period of 20 years. LED lighting‚ is the use of
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What was the short-term significance of Florence Nightingale in bringing about change in nursing practice in the 1860s. In the Dickens book “Martin Chuzzlewit” the character Mrs Gamp a nurse‚ was dirty‚ fat‚ and old and also a drunk‚ which was like most nurses of those days before Nightingale. One can say that because of this‚ nursing was not seen as a highly regarded profession. Source A supports the view of Mrs Gamp being a true portrayal of nurses in the 1800s. It is an article from the Telegraph
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serious environmental concern‚ it is an issue that has serious impact on the environment‚ ecology and society. Outdoor lighting is designed with a purpose. External lighting is considered as functional lighting. However‚ over-lit outdoor lamps including traffic lamps and advertisement spotlights have led to 377 complaints to various government departments in 2009 (Mingpao‚ 2010). The problem of light pollution have arouse much concerns. Are there any government policies that regulate the lighting at
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *1144188971* COMBINED SCIENCE Paper 2 (Core) 0653/21 October/November 2010 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams‚ graphs‚ tables or rough working
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Introduction The blowfly goes through a complete metabolic change in body form at each stage in their life. - Stage 1 - Egg - Stage 2 - Larvae - Stage 3 - Pupa - Stage 4 - Adult Adult -- Blowflies are a group ranging from 6 to 14 mm in length. The black Blowfly has a dark‚ olive-green body‚ black legs‚ and orange pubescence around the spiracles. All Blowflies have blunt mouthparts and do not bite. Egg -- The white or pale yellow eggs of Blowflies may occur in small batches or large
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Preludes and echoes many of its themes. Rhapsody... charts the night-time journey of a man through the streets of a city. Held in a trance by the moonlight‚ he is shown various sights by the street lamps he passes‚ and these sights evoke images‚ feelings and recollections. From the sights revealed by the lamps‚ and the responses they induce‚ a portrait of the city life is painted. The poem begins by establishing the scene. A man is wandering "Along the reaches of the street / held in a lunar synthesis"
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our lives would be very different. The light bulb is a very useful invention that people all over the world use every day. The creation of the light bulb can be traced back to the 19th century. In 1800‚ Humphrey Davy made the arc lamp (“Lighting”). But the arc lamp was very dangerous because light was made by sparks‚ increasing the chance of fire (Burnie 52). In 1860‚ Joseph Swan made an incandescent light bulb. But the light bulb had many disadvantages. The light bulb burned out in an hour and
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Ten Minutes of Specific Heat Remi Adams East Rowan High School AP Environmental Science Abstract Specific heat and climate were the primary focus of this lab. Specific heat is defined as “the measure of the ability of a substance to change temperature”. The purpose for carrying out this lab was to determine the specific heat/rates of both soil and water‚ and then comparing them. Students also were to relate specific heat to climate. Students were to determine which substance expressed
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Name: Period: Circuits-Circuit Analysis Base your answers to questions 1 through 3 on the information and diagram below. 4. A 9-volt battery is connected to a 4-ohm resistor and a 5-ohm resistor as shown in the diagram below. A 3.0-ohm resistor‚ an unknown resistor‚ R‚ and two ammeters‚ A1 and A2‚ are connected as shown with a 12-volt source. Ammeter A2 reads a current of 5.0 amperes. What is the current in the 5-ohm resistor? 1. 1.0 A 2. 1.8 A 3. 2.3 A 4. 4.0 A 1. Determine the equivalent
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