In Ancient China many advancements in weaponry were made due to one of the most important inventions in China’s history‚ Gunpowder. The Ancient Chinese made gunpowder by mixing certain fuels and ores could explode if mixed in the right proportions and heated. They found this out while they were searching for the “elixir of everlasting life” on behalf of the emperor‚ which led to the invention of gunpowder. Here are a few devastating weapons that the Ancient Chinese made with gunpowder. Ancient Chinese
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than smaller ones. Since a larger tank can hold a larger volume of water‚ the conditions of the water remain more stable‚ and are less apt to be affected by unavoidable mechanical failures‚ as well as waste products of the fish (Thraves 12). If a heater were to fail‚ the larger volume of water would cool more slowly than would a smaller volume‚ thus maintaining the conditions of the tank for a much longer period. In addition‚ a larger aquarium is always more humane for a fish than a smaller one (Kolle
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‘Most accidents occur in and around the home. Discuss’ We’d all like to believe that our home is a secure‚ comfortable environment‚ but we tend not to notice that this very place holds the potential to become very dangerous. In fact‚ most accidents occur in and around our homes‚ with the consequences involving anything from minor abrasions to a fatality. Believe it or not‚ water one of our most valued necessities in life‚ can not only provide life but also take it. Young children are often the
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Write your name here Surname Other names Centre Number Candidate Number Edexcel GCSE Physics/Additional Science Unit 2: Physics for Your Future Higher Tier Thursday 24 May 2012 – Morning Time: 1 hour You must have: Calculator‚ ruler Paper Reference 5PH2H/01 Total Marks Instructions Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name‚ centre number and candidate number. Answer all questions. Answer the questions in the spaces provided
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“Without environmental sustainability‚ economic stability and social cohesion cannot be achieved.” There are 1 billion children living in poverty (1 in 2 children in the world)‚ 40 million live without adequate shelter‚ 400 million have no access to safe water. Every second 4 people die from hunger; around 27-28 percent of all children in developing countries are estimated to be underweight or stunted. Even though in 2008‚ according to UN‚ the majority of the world population is living in the
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Task E Ei A list of the routes by which infection can enter the body Breaks in the skin Respiratory system‚ Digestive tract Urinary tract Eii A description of how our own health or personal hygiene may place others risk in the workplace If you have been ill vomiting diarrhoea need to be clear for 24 hours Coughing and sneezing not washing your hands afterwards Wash yourself daily‚ keep long hair tied back Limit your jewellery as it can store bacteria Wash your hands properly after every task
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that the first and last step takes the most time. Actually‚ the last step took me the longest time. I saw a news on the website about Chipotle‚ which is spending millions dollars on the heater improvement. This change will make the process‚ which is able to reduce 0.5 second. I saw they only put the burrito in the heater for 3-4 seconds. This small change takes 0.5 second out of the whole 1 minute 45 seconds. This decision is too small to improve the process‚ and it is just a small parts of the order
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ABSTRACT This experiment was carried out to determine the relationship between the pressure and the temperature of saturated steam in equilibrium. Besides that this experiment was also done to demonstrate the vapor pressure curve. The marcet Boiler was used for this experiment. When the pressure increases‚ the temperature also increases. Therefore‚ the relationship of pressure and temperature is directly proportional. The derived formulae and the data were used to calculate the slope. The dT/dP
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are classified as either watertube or firetube boilers‚ but other designs such as cast iron‚ coil type‚ and tubeless (steel shell) boilers are also produced. Components of a boiler system The main components in a boiler system are boiler feedwater heaters‚ deaerators‚ feed pump‚ economiser‚ superheater‚ attemperator‚ steam system‚ condenser and condensate pump. In addition‚ there are sets of controls to monitor water and steam flow‚ fuel flow‚ airflow and chemical treatment additions. More broadly
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This paper presents the design‚ fabrication and thermal imaging of three microheaters (Fig. 1) and the growth and characterization of single-walled carbon nanotubes (SWNTs) (Fig. 5) on these microstructures. SWNTs have many superior properties suitable for beyond-CMOS technology scaling and high-sensitivity chemical and biological sensors. For material synthesis‚ chemical vapor deposition (CVD) is a widely used method that produces high-quality SWNTs [1][2][3]. However‚ the high CVD growth temperature
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