The fundamentals of UV-Vis spectrophotometer make use of visible light and ultraviolet radiation to analyze a substance chemical structure. A light source is shined on a sample‚ and depending on the property of the material‚ it may absorb or transmit the energy at specific wavelengths. UV-Vis spectrophotometer is used in analytical chemistry for the quantitative determination of things such as transition metal ions. The UV-Vis spectrophotometer measures the amount of light
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harmless-looking on the kitchen counter. Yet as soon as you cut an onion‚ the tears begin to fall. What is it in onions that makes them burn your eyes? Why Ice Floats Thomas Northcut‚ Getty Images Can you imagine how different the world around you would be if ice sank? For one thing‚ lakes would freeze from the bottom. Chemistry holds the explanation for why ice floats‚ while most substances sink when they freeze. How Soap Cleans Sean Justice‚ Getty Images Soap is a chemical that mankind has been
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I would like to tell you a few words about Sweden Ice Hotel. Have you ever admired the northern lights from the seat of a snowmobile or behind a dog-sled? I suppose no one would have refused this experience. So you can get such unforgettable emotions with the Ice Hotel. Situated in Jukkasjarvi‚ in the heart of magical Swedish Lapland‚ it is surrounded by tranquil forests‚ pristine snow-covered fells and frozen lake - a true winter wonderland. Moreover‚ there are only 200 km north of the Arctic
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Assignment 1 Presentation of an ‘Ice Breaker’ activity Due date: On day of presentation Weighting: 20% Length and/or format: Approx 20 minutes Purpose: This exercise asks you to research an ice breaker game that you can implement in class. You are required to facilitate the game using your fellow class mates as participants. You need to introduce the activity‚ explain how to play it and then facilitate the game. Upon completion you must explain why you chose the activity and what it
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Isaac Solar Ice Maker Solar Icemaker Up to 1000 pounds of ice per day! Low cost and reliable source of ice for situations requiring 25 to 1000 pounds of ice per day (12-450kg). "Isaac" is the acronym for Intermittent Solar Ammonia Absorption Cycle. Ammonia absorption refrigeration technology was developed in the 19th century and is still used in industrial applications. Energy Concepts has adopted this technology to a machine which uses the sun as the only energy output. The particular advances
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Melting Ice Caps The Arctic is global warming’s canary in the coal mine. It is a highly sensitive area which is profoundly affected by the changing climate. The average temperature in the Arctic is rising twice as fast as elsewhere in the world (nrdc.org). Because of this‚ the ice cap is getting thinner‚ melting away‚ and rupturing. Here is an example of this; the largest ice block in the Arctic‚ the Ward Hunt Ice Shelf‚ had been around for 3000 years before it started cracking in 2000 (nrdc
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exceptions can kill you and climate change is one of those exceptions.” Al Gore According to the National Snow and Ice Data (NSIDC)‚ since 1979 the arctic sea ice minimum extent has shrunk by more than 50% and even greater amounts of ice have been lost in the corresponding thinning of the ice. Many scientists are now agreeing that the Arctic may be completely ice-free during the summers as soon as the end of this decade. This will undoubtedly cause the type of environmental blow-back that
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Have you ever seen dry ice‚ well let me show you. To measure the evaporation rate it is important to know that a half pound of dry ice will be placed outside and timed. The same thing will happen but in a cool room. If the dry ice is -109.3°F then it will evaporate in any condition warmer. The hypotheses is that the dry ice in the outside will evaporation faster. It is important to understand this because if you are trying to store dry ice and you put it in a freezer it will still evaporate. So in
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Ailine Veiga Question: what is the heat of fusion of ice? Hypothesis: To get the heat of fusion of ice we need to determine the Energy it takes to melt the ice and also the mass of the ice and determine the heat of fusion. To determine the mass of the ice melted (m) we start by determine the volume of the water generated when the ice melted. This is the difference between the final volume (v2) and the initial volume (v1). Using the density of water (1.0g/mL)‚ this volume can be converted into mass
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realize it is happening? That’s what I believe Robert Frost’s poem Fire and Ice is meant to express. Although the poem is short‚ it holds a very interesting question to think about. The question is which way would you rather the world come to an end. There are two choices. The first two lines in Fire and Ice express the choices‚ “Some say the world will end in fire‚ / Some say in ice.” I feel that he uses the term fire not to hold the direct meaning of a burning flame
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