Method of Communication and Different Uses of Communication With the development of civilization and written languages came the need for more frequent and reliable methods of communication allowing messages to reach longer distances. This was essential to the control of trade and other affairs between nations and empires. Early man used cave walls as the media on which messages could be transcribed‚ this was common for many years‚ until the Egyptians discovered a special kind of rush (Papyrus)
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and Listening Comprehension Writing techniques for diary entries and formal letters. Wide range of topics covered for reaction questions Exam questions and techniques Sample answers for written section Tips for French OralsPHYSICS(H) Electricity Magnetism Heat Temperature Nuclear Physics Option 1 Particle Physics Exam questions and techniquesCHEMISTRY (H) Inorganic Chemistry Reactions Organic Chemistry Mechanisms Preparations Calculations involved in organic chemistry. Organic Chemistry Reactions
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Michael Faraday was the third son of a London blacksmith. He became a self- taught scientist whose greatest discoveries concerned electricity. In 1831‚ Faraday proved that magnets can be used to produce an electric current. This discovery enabled him to build an electric generator. It was a forerunner of the giant dynamos that keep the modern world supplied with power. Faraday was born on September 22‚ 1791‚ in Newington‚ England. When he was five‚ his family moved to London
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CHE 151-50 Fall 2013 Lab report Isolating the Components of a Three Component Mixture The purpose of this experiment was to separate the component of three mixtures sand‚ sodium chloride and calcium carbonate then calculate the percentage by mass of each component recovered from the mixture. The other purpose of this experiment was to show us the students the concepts associated with physical and chemical properties of substances. Me and my lab partner‚ obtained a mixture of a un known
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president‚ and a good lot of people should never be put in any type of leadership role. A president should be compassionate‚ intellectual‚ and conviction. A man who I believe has all of these qualities is president Theodore Roosevelt‚ throw in animal magnetism‚ a sharp wit‚ and a sparkling personality and you have one of the best presidents our country has ever seen. Beneath all the "man’s man" energy that surrounded him‚ Roosevelt was undeniably a compassionate and caring man. His compassion lead
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NOVA: How the Brain Works The description pretty much describes this video well. In essence‚ it’s a look into the complexity of the human brain. Trying to understand how we perceived the world around us and showing some of the experiments that try to explain how the process works. If you want to spend an hour with quirky but interesting approach to the topics of how illusions work‚ how our brains are affected by electro-magnetic impulses and what is the current status of artificial intelligence
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CHAPTER 1 ELECTRICAL FORMULAS OHM’S LAW/POWER FORMULAS R x I2 E x I P R P E E2 RxI R P I P x R E I P I E R E R P I2 E2 P P = Power = Watts R = Resistance = Ohms I = Current = Amperes E = Force = Volts 1-1 OHM’S LAW DIAGRAM AND FORMULAS E I E = I x R I = E ÷ R R = E ÷ I R Voltage = Current x Resistance Current = Voltage ÷ Resistance Resistance = Voltage ÷ Current POWER DIAGRAM AND FORMULAS P E I = P ÷ E E = P ÷ I P = I x E I Current = Power ÷ Voltage
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SAFETY PRECAUTIONS IN USING ELECTRICITY:- 1. Avoid water at all times when working with electricity. Never touch or try repairing any electrical equipment or circuits with wet hands. It increases the conductivity of electric current. 2. Never use equipment with frayed cords‚ damaged insulation or broken plugs. 3. If you are working on any receptacle at your home then always turn off the mains. It is also a good idea to put up a sign on the service panel so that nobody turns the main switch ON
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Physics is a natural science that involves the study of matter and its motion through spacetime‚ as well as all related concepts‚ including energy and force. More broadly‚ it is the general analysis of nature‚ conducted in order to understand how the universe behaves. Physics is one of the oldest academic disciplines‚ perhaps the oldest through its inclusion of astronomy. Over the last two millennia‚ physics had been considered synonymous with philosophy‚ chemistry‚ and certain branches of mathematics and biology
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Physics Part-II‚ Textbook for Class XI‚ Published by NCERT Class XII (Theory) One Paper Unit I Unit II Unit III Unit IV Unit V Unit VI Unit VII Unit VIII Unit IX Unit X Time: 3 Hours Electrostatics Current Electricity Magnetic effect of current & Magnetism Electromagnetic Induction and Alternating current Electromagnetic Waves Optics Dual Nature of Matter Atoms and Nuclei Electronic Devices Communication Systems Total Total Periods : 180 70 Marks 08 07 08 08 03 14 04 06 07 05 70 Unit I: Electrostatics
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