impactful waves of immigration to the United States occurred as a result of the Irish Potato Famine. The famine occurred due to failure of Ireland’s potato crop in 1945 through 1949 (Mokyr 1). Although the famine lasted four years‚ its effects can still be seen in the United States. The influx of Irish immigrants served as the backbone of the industrializing United States and forever changed the nation. Despite the Irish Potato Famine’s impact on the United States‚ it could have been avoided if other nations
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Controlled Assessment: Osmosis of a Potato [pic] Osmosis: Osmosis is the movement of substances through a partially/semi permeable membrane from an area of high concentration to an area of low concentration to balance of the concentration of the two sides. Biological membranes do allow water to pass through‚ but water will have no net movement unless osmosis takes place. Preliminary Method I have chosen to investigate the factor of the weight of potato strips after set amounts of time.
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References: Local Chua (2003) stated in his “Heart to Heart Talk: Is Your Drinking Water Safe?” that Water purification is now both a science and a technology Foreign Gil and Passino (2004) purification of drinking water is a very important problem in environmental engineering Local Israel (2009) Potable or drinking water is a critical requirement of human life
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The dry cell or Leclanche cell was the first commercial battery and therefore had a big impact on society. It is the most common and the cheapest of the commercially available cell and is most widely used in torches‚ portable radios and battery-operated clocks. It is best used for low drain appliances‚ which need only small currents such as portable items (radio). It consists of a zinc outer casting‚ the anode‚ an aqueous paste of ammonium chloride and a mixture of powdered carbon and manganese
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Chapter 3 Problems 1. Dental Delights has two divisions. Division A has a profit of $200‚000 on sales of $4‚000‚000. Division B is only able to make $30‚000 on sales of $480‚000. Based on the profit margins (returns on sales)‚ which division is superior? 3-1. Solution: Dental Delights Division A Division B [pic] Division B is superior 3. Bass Chemical‚ Inc.‚ is considering expanding into a new product line. Assets to support this expansion
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Using Sucrose Solutions to Determine Osmolarity of Potato Tubers Based on Weight By Thomas Pelikan Biology 200A Section 004 Kimberly Schmidt October 2‚ 2012 Abstract: In this experiment we were trying to determine the osmolarity of potato tubers by weighing them before and after incubating them in solutions of sucrose with varying molarities. To find the osmolarity we took a potato and used a cork borer to obtain seven samples of potato tubers. We then prepared seven beakers with concentrations
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EVALUATION OF NEWLY RECOMMENDED SWEET POTATO VARIETIES UNDER COCONUT BY NELSIE MODINA FERNANDEZ Abstract This study was conducted to evaluate the growth and yield performance of different sweet potato varieties grown under coconut‚ and to determine which variety of sweet potato would perform best under coconut. Among the agronomic characteristics measured‚ only herbage yield differed significantly among sweet potato varieties and was lowest in PSB-Sp 16. Based on ocular observation‚ this might
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one of the most burning problems of nowadays. Now millions of chimneys‚ cars‚ buses‚ trucks all over the world exhaust fumes and harmful substances into the atmosphere. These poisoned substances pollute everything: air‚ land‚ water‚ birds and animals people. So‚ it is usually hard to breathe in the large cities where there are lots plants. Everything there is covered with soot and dirt. All these affect harmfully. Environmental pollution is one of the most acute problems of modern society. The Earth
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Investigating Osmosis In Potato Cells Apparatus: The apparatus used in this experiment were: 1) 5 beakers‚ 2) 3 large potatoes (same type)‚ 3) 15 pieces of potato without skin (roughly the same size)‚ 4) 10 pins‚ 5) 50ml of distilled water‚ 6) 50ml salt solution 0.50‚ 7) 50ml salt solution 1.00‚ 8) 50ml salt solution 1.50‚ 9) 50ml salt solution 2.00 10) Scales‚ 11) Knife‚ 12) chopping board‚ 13) cork borer‚ Prediction & Theory: When the potato pieces are put in to the water there
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occur by moving water through the semi-permeable membranes. If the concentration of sucrose in the solution is less than the concentration of sucrose found in the potato‚ then the potato would decrease in mass. The opposite would occur as well‚ if the concentration of sucrose in the solution is more than that of the potato‚ then the potato would expand and gain in mass. In conducting this as an
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