Ravindra Nandigam‚ Ph. D.‚ South Texas College Name: Course Number: Semester: Phys 1417 Physical Science II‚ Homework #5 Instructions: 1. Type your name‚ Course number (=PHYS 1417.V01)‚ and Semester (=Summer I‚ 2013). 2. Type your answers. Include questions. 3. Make sure that all parts of each question are answered. 4. Turn in. Chapter 25 Rocks and Minerals 1. List the 8 elements which make up about 98% of Earth’s entire mass. 2. The most abundant element in the Earth’s interior is __________________
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answers in the boxes. Send your completed lab report to your instructor. Dont forget to save your lab report to your computer Activity 1 Record your data from Activity 1 in the boxes below. Enter the data for the sample you used in each trial (5000 rpm‚ 10000 rpm‚ etc) in the appropriate columns and the corresponding g-force‚ number of layers‚ and position of layers position results. You will need to use the following formula to assist with your laboratory report G-force 0 00001118 x radius of centrifuge
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object or evaluation. This report aims to conclude whether there is a difference between female and male attitudes towards smoking. It is hypothesised that females will have a more positive attitude towards smoking. Questionnaires using a 5 point likert scale will be utilised to measure each participants’ attitude towards smoking through their responses. Results stated there is no significant difference between genders when scores were placed through an independent t-test. It is concluded that more
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EXPERIMENT I Photoreduction of Benzophenone Introduction The study of chemical reactions‚ isomerizations and physical behavior that may occur under the influence of visible and/or ultraviolet light is called Photochemistry. The fundamental principles for understanding photochemical transformations are that light must be absorbed by a compound in order for a photochemical reaction to take place‚ and that for each photon of light absorbed by a chemical system only one molecule is activated for
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Chemotherapeutic Agents of Control: Introduction: Chemotherapeutic agents are chemical substances used to treat various forms of infectious diseases. The chemotherapeutic agent works by stopping the bacteria from reproducing. There are two different kinds of chemotherapeutic agents. The first kind is an antibiotic‚ which slow down the growth of microorganisms. The second kind of chemotherapeutic agent is synthetic drugs. Synthetic drugs are artificially made in a laboratory. Chemotherapy
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Lab Report Microbiology Introduction Bacteria can be found almost anywhere. For human life‚ some help us‚ some hurt us‚ and others are neutral. It is now known that good bacteria‚ or normal microflora‚ can reach 1014 microbial cells. This is far more than the 1013 cells that make up the human body (Tannock‚ 1995). The total number of bacteria on Earth is estimated to be around 4-6 x 1030 (Horner-Devine‚ 2004). It is important to know the extent of bacteria‚ how they live‚ and how they are
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knowing that lactase is specific for lactose‚ lactose will separate into galactose and glucose‚ as maltose will not change (153-155). Lactase should like lactose. For unit 7.4 my hypothesis was that EDTA will remove the ions‚ and will not work. Materials/Methods For unit 7.3 the experiment needed 2 microfuge tubes one labeled "L" for lactose and the other labeled "M" for maltose. The experiment also called for a total of 3 clean plastic pipettes. With one pipette add milk up to the 0.5 line of the
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J/m² | 1 | 11.09 | 3.28 | 0.124 | 3408.92 | 2 | 11.09 | 3.28 | 0.126 | 3463.90 | B-7.2 Specimen | Joules/Fracture Strength‚ J/m² | GPPS | 3450.15 | HIPS | 8192.40 | HDPE | 5649.46 | PP | 3436.41 | 8.1 Out of the four plastic materials‚ High Impact Polystyrene (HIPS) exhibits the highest impact strength compared with the other three. This suggests that HIPS withstand impact strength best‚ followed by High density polyethylene (HDPE)‚ General Purpose polystyrene (GPPS) and Polypropylene
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Introduction The science of microbiology is all about microorganisms‚ what they do and how they work. Microorganisms are ubiquitous‚ and are a very important part of life everywhere since they have been around for billions of years. The two main themes associated with microbiology are (1) having an understanding of the nature and function of the microbial world‚ and (2) being able to apply that understanding of the microbial world so that the benefits to the Earth and humans are known(6). This lab specifically
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Arsenic A Fatal Poison Arsenic A Fatal Poison How Is This Substance Used? Arsenic is used in agriculture‚ military and medicine. It is sprayed on crops as an insecticide in many parts of Canada. The military used it as poison during‚ World War I and II‚ and many medicines are made with arsenic‚ such as arsphenamine and arsenic trioxide. How Is This Substance Used? Arsenic is used in agriculture‚ military and medicine. It is sprayed on crops as an insecticide in many parts of
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