Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
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dysfunction_ All motor dysfunction means is abnormality in the use of the motor system‚ or where a muscle or nerve cannot control motion. Paresthesia_ this is know as the sensation of tickling‚ tingling‚ pricking‚ or burning of someone’s skin with no long term affect. The most common sensation is known as “pins and needles”. Cyanotic- This means there is a bluish color to a persons skin because of lack of oxygen saturation. Hypoventilation- This is known as respiratory depression. This is when ventilation
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Evidence of Photosynthesis Photosynthesis is the process during which a plant’s chlorophyll traps light energy and sugars (glucose) are produced. In plants‚ photosynthesis occurs only in cells with chloroplasts. Water (H2O)‚ carbon dioxide (CO2) and light energy are required. The light energy is absorbed by the green pigment‚ chlorophyll‚ and is converted into chemical energy‚ which causes the water drawn from the soil to split into molecules of hydrogen and oxygen. The hydrogen combines with
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________ Name: Loren B. Matulac Date : November 09‚ 2013 Yr. & Section: IV- Perseverance Teacher: Mrs. Pacita J. Yapsangco “Magnetic Field of a Coil” Experiment 2.5 I. Objectives: To produce a strong magnetic field just by looping the wire into coils II. Materials: 6 V or 9 V batteries 50 cm of bare 12- gauge copper wire Stiff cardboard and scissors Wooden dowel (about 15 cm long x 4 cm
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tested in this study? (i.e.‚ What is the question that researchers are trying to answer across the two experiment?) (2 pts) The general hypothesis tested in this study concerns the effectiveness of classical moral storytelling as a promoter of virtues in 3- to -7- year-old children. Specifically‚ researchers aimed at determining how this type of fiction might educate children on honesty‚ as well as warn them about the consequences of lying. For this reason‚ they conducted two experiments. In the
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Introduction1 2. Description of Digital Evidence2 3. Principles of Cyber Forensics3 4. Examination of Digital Evidence4 4.1 Preserving the evidence5 4.2 Locating the evidence6 4.3 Selecting the evidence 7 4.4 Analysing the evidence 8 4.5 Validating the evidence 9 4.6 Presenting the evidence 12 5. The Importance of Crime Reconstruction Hypotheses and Alternate Hypotheses 14 6. Conclusion 15 References 16 1. Introduction With the rapid development
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counsel has all but eliminated confessions as routine investigative tool; (2) the staggering increase in crime rate in the United States; (3) the fact that all illicit-drug seizures must be sent a forensic laboratory for confirmatory chemical analysis before the case can be adjudicated in court; (4) the advent of DNA profiling. 2. Describe the criteria for admissibility of scientific evidence as laid out in Frye v. United States. The court ruled that in order to be admitted as evidence at trail
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Theme : Electrical Sector and Chemical Engineer a) “The Chemical Engineer – His Role in Electrical Manufacturing” by N.R. Maleady The article is about the role of chemical engineer in manufacturing transformers in the electrical manufacturing sector. The important components of the transformer are copper wire‚ cellulosic insulation‚ insulating varnish and dielectric liquid. Wire enamel or resin is the insulting structure for copper wire. The resin can either applied as a solution or in solventless
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Hazardous chemical waste in the Liverpool area The aim of my research action plan is to address how people disposed of their hazardous chemical waste from households and schools within the Liverpool area. What is hazardous chemical waste? Chemical waste is a waste that is made from harmful chemicals such as: * Paint/ artist paint/ paint thinner * Motor oil * BBQ gas cylinders * Insect sprays * Rat poisons * Garden chemicals- fertilisers ‚ insecticides * Car wax
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Chemical Periodicity ------------------------------------------------- ABSTRACT The experiment chemical periodicity shows the properties and reactions belonging to group IA‚ IIA‚ and IVA. Proper procedures and observations were done to determine the solubility‚ physical state‚ color‚ and appearance of the compounds namely Li2CO3‚ Na2CO3‚ K2CO3‚ CaCO3‚ and BaCO3. The results shows that Li2CO3‚ Na2CO3‚ K2CO3 were soluble in water‚ while MgCO3‚ CaCO3‚and BaCO3 were not soluble. All of these compounds
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