Biology 10 Vinegar Eel Lab Adam Dorner 1) The most toxic metals were silver‚ lead and iron‚ all killing the eels in under four minutes‚ with silver taking only 1 minute and 40 seconds to kill the eels‚ and only 13 seconds to make the eels stop forward motion. Strontium wasn’t effective as after 5 minutes of exposure to it‚ the eels hadn’t died or stopped forward motion. 2) a) The accepted toxicity varies from metal to metal. The accepted toxic level of lead is 0.0012 parts per million‚ however
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Separation by difference in particle size: Sieving: - Is a way pf separating mixtures of solids‚ or solids and liquids with different sized particles - The mixture is poured through a sieve and the particles smaller than the sieve pass through while the larger particles are trapped by the sieve - The are commonly used for cooking - E.g. a mixture of rice and water is poured through a sieve to capture rice and remove the water Filtration - Is a technique commonly used for mixtures of solids and liquid
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NATIONAL DIPLOMA IN ENGINEERING UNIT 10 – PROPERTIES AND APPLICATIONS OF ENGINEERING MATERIALS ASSIGNMENT 1: Structures and Properties of Engineering Materials. Special attention should be paid to the Grading Criteria‚ as this will influence the way you answer each of the tasks. For each question all tasks need to be answered correctly to achieve the relevant criteria. Question 1: (P1) With the aid of clear‚ annotated diagrams‚ describe the structure associated with the following engineering
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In the past pilots were not allowed to take any form of anti-depressant. This rule was created for the safety of the passengers. Some side effects of anti-depressants would inhibit a pilot’s ability to perform their job. Insomnia‚ Diarrhea‚ dizziness‚ fatigue‚ drowsiness‚ tremors‚ increased perspiration‚ abdominal pain‚ vision changes‚ and hot flashes‚ are just several of the many possible side effects of an anti-depressant. Regulators were most concerned about the dizziness‚ drowsiness‚ fatigue
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A BRIEF HISTORY OF THE DEVELOPMENT OF PERIODIC TABLE Although Dmitri Mendeleev is often considered the "father" of the periodic table‚ the work of many scientists contributed to its present form. In the Beginning A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements. Although elements such as gold‚ silver‚ tin‚ copper‚ lead and mercury have been known since antiquity‚ the first scientific discovery of an element occurred in 1649 when
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Binary Compounds w/ Fixed Charge Given The Formula‚ Write The Name Binary Compounds w/ Fixed Charge Given The Name‚ Write The Formula Binary Compounds w/ Variable Charge: Stock System Given The Name‚ Write The Formula Binary Compounds w/ Variable Charge: Stock System Given The Formula‚ Write TheName 1) MgO 2) LiBr 3) Ca3N2 4) Al2S3 5) KI 6) SrCl2 7) Na2S 8) RaBr2 9) MgS 10) AlN 11) Cs2S 12) KCl 13) Sr3P2 14) BaI2 15) NaF 16) CaBr2 17) BeO 18) SrS 19) BF3 20) AlP 21) Rb2O 22) CaI2
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4.1 & 4.2: General properties of aqueous solutions and Precipitation Reactions: 1. (Brown 4.11) When asked what causes electrolyte solutions to conduct electricity‚ a student responds that it is due to the movement of electrons through the solution. Is the student correct? If not‚ what is the correct response? 2. (Brown 4.15) Specify what ions are present in solution upon dissolving each of the following in water: a. ZnCl2 c. (NH4)2SO4 b. HNO3 d. Ca(OH)2 3. (Brown 4.16 ) Specify
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and any foreign nations operating on Australian lands are to abide by the term and regulations. (c) Argentina’s‚ Chilli’s‚ and United Kingdom’s claims are all in the same area and are about the same size. Key Ag - Silver Au - Gold Co - Cobalt Cu - copper Cr - Chromium Fe - Iron Mb - Molybdenum Mn - Manganese Ni - Nickel Pb - Lead Ti - Titanium U - Uranium Zn - Zinc (d)The ban on mineral exploitation states that mining in Antarctica
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Prelab 5B Macrocyclic Synthesis OBJECTIVE: The objective this week is to produce Tetraphenylporphyrin and its metal complex. This will be carried out by condensation of 4 equivalents of Benzaldehyde and pyyrole in the presence of propanoic acid. The product will undergo UV/Visible Spectrum tests to determine its lambda max. The lambda max will show us the relationship between a conjugated system and the visible spectrum. PROCEDURE: Step 1: preparation of meso-tetraphenylporphyrin (TPP)
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Final year design report Word count:1672 Research & Development The theme of my final year project is “Line of the body”. Once‚ I saw Comme des Garcons 2012 RTW F/W in a fashion magazine. Their 2012 series that has a creative and stereoscopic cutting which lure my attention. It prompted me to think how can a design stand out human body shape. Firstly‚ I started to do some research in the Internet about humans’ body shape. Then I developed my theme idea mainly from the research on human
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