the first modern thermometer‚ the mercury thermometer with a standardized scale‚ was invented by Daniel Gabriel Fahrenhei[->0]t in 1714. The Celsius temperature scale is also referred to as the "centigrade" scale. Centigrade means "consisting of or divided into 100 degrees". In 1742‚ the Celsius scale was invented by Swedish Astronomer Anders Celsius[->1]. Lord Kelvin[->2] took the whole process one step further with his invention of the Kelvin Scale in 1848. The Kelvin Scale measures the
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greenhouse effect. This keeps the planet warmer than it would be without an atmosphere. Apart from water‚ the most abundant greenhouse gas‚ by volume‚ is carbon dioxide. Carbon dioxide gases and other greenhouse gases help to keep the Earth 33 degrees Celsius warmer that it would otherwise be without an atmosphere. How does air pressure change with altitude? 1. The gravitational attraction(*) between the earth and air molecules is greater for those molecules nearer to earth than those further away
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temperature (22 degrees Celsius). 5. Into a graduated cylinder‚ we carefully poured 10mL of Acetone from the buret‚ 10mL of HCL‚ and 20mL of distilled water. Once we had those three in the gradated cylinder we put 10mL of iodine in a test tube and we placed both in the 500 mL beaker with thermometers in each solution to ensure that they were all the same temperature when we added the iodine. As soon as all the solutions reached the desired temperature (22 degrees Celsius) we poured the iodine
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Abstract: The goal of this experiment was to synthesize aspirin. In this experiment aspirin‚ also known as acetylsalicylic acid‚ was synthesized from salicylic acid and acetic anhydride. In the reaction the hydroxyl group on the benzene ring in salicylic acid reacted with acetic anhydride to form an ester functional group. This method of forming acetylsalicylic acid is an esterification reaction. Since this esterification reaction is not spontaneous‚ sulfuric acid was used as a catalyst to initiate
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pre-exponential factor‚ k o ‚ the activation energy‚ E‚ and the reaction rate constants‚ k‚ of the saponification process of ethyl acetate using sodium hydroxide (NaOH) at 5 temperature between 15 and 25 degrees Celsius. Two trails were performed at temperatures 16‚ 18‚ 20‚ 22‚ and 24 degrees Celsius. The main equipment of the project were the jacketed beaker batch reactor and the LabPro conductivity probe. The solution’s conductivity throughout the reaction was collected and plotted in a linearized plot
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BIOLOGY HOMEWORK TASK HYPOTHERMIA Hypothermia is a condition in which the body’s core temperature drops below that required for normal bodily functions. This is generally considered to 35 degrees Celsius. Body temperature is usually maintained to a constant level of 36.5 – 37.5 degrees Celsius through biological homeostasis which he have been learning about in class throughout this term! If a person is exposed to the cold for a prolonged period of a time and their bodily mechanisms are unable
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difference in boiling points. The boiling point of hexane is 69 degrees Celsius and the boiling point of toluene is 110 degrees Celsius. Three fractions were collected for both simple and fractional distillation. The first fraction was hexane since it had the lower boiling point. The second fraction was a mixture of toluene and hexane. The third fraction was toluene since it had the high boiling point of 110 degrees Celsius. Gas chromatography was also preformed on each of the fractions from simple
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This occurs when the external temperature is very hot‚ either from physical exertion or over exposure to natural heat. Summer in Antarctica reaches temperatures of up to 15 degrees Celsius‚ however most of the time remains below 0 degrees Celsius. As the heat increases‚ the metabolic rate of the individual also increases‚ meaning the body will need more energy‚ ie. food‚ and liquid to maintain this faster rate of metabolism. This explains why during the summer
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The objective of this experiment was to learn the process of recrystallization and how this process removes the impurities from a pure solid compound. The methods used to achieve this objective were also hot vacuum filtration in order to remove suspended solid impurities‚ and isolating the pure acetanilide. In the next lab‚ percent recovered was obtained through weighing the acetanilide sample as well as comparing its melting point range. In this experiment‚ the sample‚ acetanilide was weighted
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Winter temperature average around 0 degrees Celsius and in the summer the average is around 35 degrees Celsius. | Birds and insects | Tundra | Precipitation averages from 20 to 60 cm annually in arctic tundra and up to or more than 100 cm annually in alpine tundra. Winters are long and cold and averages somewhere around -30 degrees Celsius summers are short with low temperatures normally less than 10 degrees Celsius. | Large grazing musk oxen‚ caribou and reindeer are migratory
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