CELL STRUCTURE CELL THEORY: Structural and functional unit of all living things New cells arise from already existing cells Cells contain information that instructs growth. This information can be passed onto new cells. MICROSCOPES: There are two main types of microscopes: Light and Electron Electron Micrographs- shown in colour LIGHT ELECTRON Uses beam of light Magnification = x1500 Resolution = 200 nm Wide range of specimens can be used Samples are fairly quick + easy to prepare
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determine the absorbance of different concentrations of a certain solution‚ and then how to use the information gathered and Beer‟s Law to calculate the concentration of an unknown solution. Beer‟s Law relates the length which light has to travel through the solution‚ the concentration of the solution‚ and the molar absorptivity with the absorbance of that solution. Beer‟s Law states that “there is a logarithmic dependence between the transmission of light that shines through a material and the density
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Case: Gas or Grouse? 1. Systemic issues: Questar is a company and it knows that every mining activities in Mesa will affect the ecological environment. But BLM did nothing since Questar had damaged the local environment. And we know many gas companies have special relationship with governments. Corporate issues: Questar has destroyed the environment when the mining operation was begun. Individual issues: The people who live in Pinedale Mesa believe the drilling activity bring numerous
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Regents Chemistry Quarter 1 Midterm Review 1. The percent by mass of oxygen in Na2SO4 (formula mass = 142) is closest to 1) 11% 3) 45% 2) 22% 4) 64% 2. Given the unbalanced equation: __Al(s) + __O2(g) → __Al2O3(s) 3. 4. 5. 6. 7. balance the equation using smallest whole number coefficients. The percent by mass of aluminum in Al2O3 is approximately 1) 18.9 3) 47.1 2) 35.4 4) 52.9 What is the approximate percent composition by mass of CaBr2 (formula mass = 200)
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TERM PAPER ON GUJARAT GAS COMPANY LTD HISTORY: GUJRAT GAS COMPANY IS ONE OF INDIA’S LEADING NATURAL GAS DISTRIBUTION COMPANIES. IT ESTABLISHED IN 1980 AND HEADQUARTERD IN AHMEDABAD.THE COMPANY OPERATES PRIMARILY IN GUJRAT.THE COMPANY WENT PUBLIC IN 1991. THE BG ACUIRED A MAJORITY STAKE IN THE COMPANY IN 1997. OPERATIONS: AS OF 2010 GUJARAT GAS LTD SUPPLIED PIPED GAS TO OVER 3‚00‚000 HOMES‚ COMMERCIAL AND INDUSTRIAL ESTABLISHMENTS ACROSS GUJARAT
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"THIN IDEAL" The impact of media images on men and women in America is a formation of an unrealistic illustration of the thin ideal. The media has painted a picture of "the perfect body"‚ people who choose to accept these ideals develop a fantasy and fictitious image of what the ideal body is. In our society‚ where the mass media is the single strongest transmitter of unrealistic beauty ideals‚ it is often held responsible for the high proportion of women and men who are dissatisfied with their
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Prehistoric Times - Beginning of the Christian Era (Black Magic) * 1700 BC King Hammurabi’s reign over Babylon In ancient Babylon King Hammmurabbi began to classify metals such as gold ‚ iron‚ and copper. He also gave certain materials higher value than others‚ depending on the potential of the material. Known metals were recorded and listed in conjunction with heavenly bodies. 430 BC Democritus of ancient Greece Democritus and the atom: c.420 BC In the late 5th century BC Democritus
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Q. 1. During the electrolysis of molten lead bromide‚ which of the following takes place : A : Bromine is released at the cathode. B: Lead is deposited at the anode. C : Bromine ions gain electrons. D: Lead is deposited at the cathode. Ans : - D. Q. 2. Here is an electrode reaction : Cu → Cu2+ + 2e-. [i.e. Cu- 2e- →Cu2+]. At which electrode(anode or cathode) would such a reaction take place. Is this an example of oxidation or reduction. Ans : - At anode. Oxidation. Q. 3. A solution contains
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Chemistry and Society CHM/110 Xavier Villarreal November 6‚ 2011 Chemistry is a vast quantity of a person’s everyday life. A person can find chemistry in his or her daily life in the foods that a person eats‚ air a person breathes‚ soap‚ and accurately everything a person comes in contact with. Chemistry is significant in everyday life because chemicals make up everything in life. For example‚ a person’s body‚ pet‚ a desk‚ the sun‚ food‚ and drugs a person may take‚ to name a few. A person
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Practice problems Chapter 6 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which one of the following is correct? A) ν ÷ λ = c B) ν = cλ 1) C) νλ = c D) λ = c ν E) ν + λ = c 2) The photoelectric effect is __________. A) a relativistic effect B) the ejection of electrons by a metal when struck with light of sufficient energy C) the darkening of photographic film when exposed to
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