INTRODUCTION: This is a standard circuit which can be used to adjust the brightness of mains lights and the speed of AC motors. It uses a triac‚ diac and has a radio-frequency interference (RFI) noise suppression circuit built into it as well. The circuit controls the average power to a load through the triac by phase control. The AC supply is applied to the load for only a controlled fraction of each cycle. The triac is held in an OFF condition for a portion of its cycle then is triggered ON at
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The Effects Modern Technology has on Teen Communication Look around at the present American teen culture and you will observe that technology has altered society in almost every aspect. Modern technology has engrossed our society so greatly that a day without our standard use of technology is an atypical day. The youth of today have grown up around the growing rates of social networking‚ cell phones‚ and virtual communication. As a result‚ Generation Y is facing a lack of physical communication
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Title: Investigate the breakdown of starch at different temperature AIM This experiment has been done to investigate the action of the enzyme amylase on the breakdown of starch. MATERIALS These were the materials used: four starch/ agar plates‚ a marker pen‚ 1mm graph paper ruler‚ 8mm cork borer‚ forceps and template for cutting holes‚ 1% Amylase‚ water‚ incubator set at 5‚ 20‚ 40 and 60 degree Celsius. METHOD This was the experimental procedure carried out: the materials above were collected
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To begin the analysis‚ the properties of the air at the base of the tower were examined. The wet and dry bulb temperatures of the air at the inlet were used to find the humidity‚ humid volume‚ and enthalpy of dry air. For example‚ in the first trial the dry bulb temperature was 22.5⁰C and the wet bulb was 16.5⁰C‚ and the properties found from the psychrometric chart are listed below. H_bottom=0.0095 kg/(kg dry air) V_bottom=0.85 m^3/(kg dry air) h_bottom=47 kg/(kg dry air) Then‚ the cross-sectional
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“You cook like an angel”. Here is the compliment which Chef Ramsay‚ who is one of the most famous chefs in the world‚ gave to Christine Ha. She is the first blind contestant in the history of Master Chef US. Moreover‚ she has won the title Master Chef. Christine Ha has touched many hearts all over the world with her talent‚ passion and perseverance. Christine Ha was born in 1980 in Houston‚ Texas. She was diagnosed as neuromyelitis optica‚ which made her completely blind by 2007. She is not only
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Volume (mL) | Temperature (˚C) | 163.6 | | 22.0 | 213.5 | 0.5 | 22.2 | 263.3 | 1.0 | 22.3 | 313.2 | 1.5 | 22.4 | 363.0 | 2.0 | 22.6 | 364.0 | 3.0 | 22.6 | 364.1 | 4.0 | 22.6 | 364.2 | 5.0 | 22.6 | C. Empirical Relationship of Pressure and Temperature Procedure: 1) Prepare an empty 100mL flask and enclose it with a rubber stopper. 2) Place the flask in a 200mL beaker half-filled with water. 3) Set up the LabQuest instrument‚ connecting the pressure and temperature probes. 4)
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insects‚ fish and worm. These animals rely on the outside environment for their body heat as they do not generate heat internally like a mammal or bird. Ectotherms have a variety of adaptations‚ many of them behavioural‚ to regulate their body temperature and keep it within the range in which they can be active; 10-30oC The Tiliqua or more commonly known as the blue-tongue lizard or just Blue tongue is the largest member of the skink family in Australia. There are six species of blue-tongued lizards
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In each increasing drop height‚ the amount of m that the ball has bounced‚ decreased according to the drop height. As shown on the first height(1m). The ball bounces back 0.65m pointing out there is only a 0.35m gap between the drop height and bounce height. But in the second height (1.5m)‚ then bounce height is 0.867m
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wonderful destination that everyone should come once time in their life " Ha Long " . Ha Long is one of seven nature wonders of the world. Visiting Ha Long bay‚ you can experience the diversity of natural views‚ from sandy beaches to thousand year old rocky mountains. Why should you choose Ha Long bay to visit ? The word Ha Long in Vietnamese means the dragon descends into the sea and he legend says that the island of Ha Long was created by a great dragon who lived in the mountain‚ it sounds very
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Lab Report: How Temperature affects Reaction Rate Aim: The Aim is to investigate how temperature can affect Reaction Rate. The experiment will be performed by heating equally sized and weighted lime stones with equal amounts and concentration of Hydrochloric acid at different temperatures. The temperatures will be 35˚C and 40˚C. We will measure the reaction rates by observing gas release of the reaction between lime stones and Hydrochloric acid. The amount of gas release at different
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