Science
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4,610 Essays on Science. Documents 301 - 330
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An Investigation into the Effect of Changing the Concentration on the Rate of Reaction
An investigation into the effect of changing the concentration on the rate of reaction Aim: To investigate into the effect of changing the concentration on the rate of reaction Variables: · Keep the same volume · Keep the same length of magnesium · Change the amount of acid · Change the amount of water Method: · Set up apparatus as shown · Add 30ml of hydrochloric acid into the beaker · Measure 5cm of magnesium
Rating:Essay Length: 421 Words / 2 PagesSubmitted: April 17, 2010 -
An Investigation into the Factors Affecting the Rate of the Reaction Between Calcium Carbonate and Hydrochloric Acid
An Investigation into the Factors Affecting the Rate of the Reaction between Calcium Carbonate and Hydrochloric Acid A chemical reaction is the process by which atoms or groups of atoms are redistributed, resulting in a change in the molecular composition of substances. The reaction rate is how quickly a reaction occurs and this can be affected by four different factors: Ў¤ changing the surface area of any solids involved Ў¤ changing the concentration of reactants
Rating:Essay Length: 2,505 Words / 11 PagesSubmitted: December 10, 2009 -
An Investigation to Find Out How Much Hydrochloric Acid Is Neutralised by Various 100cm3 Antacid Solutions
An Investigation to Find Out How much Hydrochloric Acid is Neutralised by Various 100cm3 Antacid Solutions Dependent Variable Amount of Hydrochloric Acid – The dependent variable in the investigation is the amount of hydrochloric acid that is neutralised by the antacid solution. The amount of hydrochloric acid that is used will be measured in a burette which makes my results accurate. To make it a fair test the same concentration of hydrochloric acid will be
Rating:Essay Length: 500 Words / 2 PagesSubmitted: May 17, 2010 -
An Investigation to See How Much Oxygen Is Given off When Different Concentrations of Catalase Are Added with Hydrogen Peroxide.
An investigation to see how much oxygen is given off when different concentrations of catalase are added with hydrogen peroxide. Aim: To see if changing the concentration of catalase (found in celery) with hydrogen peroxide affects the amount of oxygen given of. Background Information: (Hydrogen peroxide - H2O2 1/2O2+H2O) Enzymes: Hundreds of chemical reactions happen simultaneously inside living cells and it's the job of enzymes to control and regulate the various metabolic activities. Enzymes are
Rating:Essay Length: 312 Words / 2 PagesSubmitted: June 5, 2010 -
An Outline of the General Scentific Insights That Microbial Genome Sequencing Can and Has Provided
An Outline of the General Scentific Insights that Microbial Genome Sequencing Can and Has Provided Microbial genome sequencing may be first dated back to the work of Frederick Sanger, who in 1975 developed the “chain termination method”, or Dideoxy termination method; the first discovered method of complete DNA sequencing.1,2. Since then, sequencing techniques have improved greatly in their efficiency, although it took 20 years for the first entire genome to be sequenced, that of Haemophilis
Rating:Essay Length: 2,180 Words / 9 PagesSubmitted: November 14, 2009 -
An Understanding of Roy’s Adaptation Theory
The History of the Roy Adaptation Model The Roy Adaptation Model for Nursing had it’s beginning with Sister Callista Roy entered the masters program in pediatric nursing at the University of California in Los Angeles in 1964. Dorothy E. Johnson, Roy’s advisor and seminar faculty, was speaking at the time on the need to define the goal of nursing as a way of focusing the development of knowledge for practice. During Roy’s first seminar in
Rating:Essay Length: 1,922 Words / 8 PagesSubmitted: March 19, 2010 -
Anaerobic Digestion and Biogas
ANAEROBIC DIGESTION AND BIOGAS TECHNOLOGY A contribution to Environmental Protection and the Conservation of Natural Resources 1. Fundamentals The main principle of anaerobic digestion technology is to feed biomass, including in particular waste materials and by-products (agricultural wastes; kitchen scraps; feaces; organic wastes) into a closed container, the biodigester. In the absence of oxygen, this digestion material is converted into high-value fertiliser humus, and pathogenic germs are eliminated at the same time. The bacteria involved
Rating:Essay Length: 1,183 Words / 5 PagesSubmitted: November 15, 2009 -
Analyse of Vertebrate Forelimbs
1. Gather information from secondary sources (including photos/diagrams/models) to observe, analyse and compare the structure of vertebrate forelimbs. Comparative anatomy is the study of the differences and similarities in structure between different organisms. An example of comparative anatomy is the pentadactyl limb which is the basic five-digit bone structure of many vertebrate’s forelimbs. The vertebrate forelimb (or the pentadactyl limb) comprises of the humerus (upper arm), radius and ulna (forearm), carpals (wrist), metacarpals (palm of
Rating:Essay Length: 1,267 Words / 6 PagesSubmitted: December 16, 2009 -
Analyse Os
Analyse Olympische deelnemers Teneinde een beeld te kunnen vormen over de “staat van dienst” van olympische deelnemers is een analyse gemaakt met betrekking tot de reeds geleverde prestaties van de gekwalificeerde deelnemers aan het olympisch taekwondo toernooi te Sydney 2000. Hierdoor moet duidelijk worden aan welke voorwaarden Nederlandse topsporters moeten voldoen om tot potentiлle deelnemers gekenmerkt te worden. De analyse richt zich op twee belangrijke selectiemomenten die een rol spelen in het process van selecteren
Rating:Essay Length: 1,268 Words / 6 PagesSubmitted: January 21, 2010 -
Analyse the Human Impacts Affecting the Nature and Rate of Change of Two Ecosystems at Risk
Analyse the human impacts affecting the nature and rate of change of two ecosystems at risk. All ecosystems are placed under levels of stress that must be withstood or overcome in the form of evolution in order to adapt and survive. These attributes determine the resilience and vulnerability of each and every ecosystem. These forms of stress fall under two categories; natural and human induced. In regards to natural stress, the term gradual is used
Rating:Essay Length: 1,912 Words / 8 PagesSubmitted: January 30, 2010 -
Analysis Model
Analysis Model V1.1 Requirements/Functions The software is required to render HTML documents. That is, it has to read an HTML document, translate it, and then display the translated version. The following functions are to be provided: - A command line interface that accepts the name of a file to be rendered. - The ability to read an HTML document. - The ability to identify all standard HTML tags and extensions added by Netscape. - Write
Rating:Essay Length: 1,670 Words / 7 PagesSubmitted: May 17, 2010 -
Analysis of Charles Darwin's Origin of the Species
Analysis of Charles Darwin's Origin of the Species Charles Darwin in his book, On the Origin of Species, presents us with a theory of natural selection. This theory is his attempt at an explanation on how the world and its species came to be the way that we know them now. Darwin writes on how through a process of millions of years, through the effects of man and the effects of nature, species have had
Rating:Essay Length: 2,022 Words / 9 PagesSubmitted: April 12, 2010 -
Analysis of Hair Coloring
History of Hair Dye Hair coloring is not a new practice; people have been changing their hair color since the era before Christ (1). The Romans had a preference to dark hair, and to fulfill this desire, they used boiled walnuts together with leeks to create the dye. They also used henna, sage and indigo plants to darken their hair (2). Ancient Greeks believed that blonde hair represented honor and courage and that is why
Rating:Essay Length: 1,738 Words / 7 PagesSubmitted: February 12, 2010 -
Analysis of Healthcare Delivery System
Managed Care Delivery Systems Introduction: According to Terence Shea in an article published by HR Magazine (2005), in the last fifty years, employers’ health cost have soared as coverage has expanded and medical care has been revolutionized. Since the early 1980s, there have been a number of governmental and corporate attempts to slow this dramatic rise in health care expenditures. Most health plans in the U.S. today involve some form of managed care. Nearly 90
Rating:Essay Length: 992 Words / 4 PagesSubmitted: January 9, 2010 -
Analysis of Hydrates
Analysis of Hydrates Pre -Lab Questions 1. Define each of the following terms: 1. Hydrate- A compound, typically a crystalline one, in which water molecules are chemically bound to another compound or an element. 1. Efflorescent compound- A chemical which has water associated with its molecules, and which, when exposed to air, loses this water through evaporation. 1. Deliquescent compound- The process by which a substance absorbs moisture from the atmosphere until it dissolves in
Rating:Essay Length: 659 Words / 3 PagesSubmitted: April 18, 2018 -
Analysis of Hydrocarbons
Analysis of Hydrocarbons Jessa Grace B. Castillo* and Stephanie Chua Department of Chemistry, University of Santo Tomas, Manila, Philippines ______________________________________________ Hydrocarbons are organic compounds containing only hydrogen and carbons and further divided in major types. Hydrocarbons react differently in reagents. The basis of determining an unknown hydrocarbon is due to the differences in reactions of hydrocarbons. An unknown compound is determined using tests. The unknown gives a positive result in nitration test and gives no
Rating:Essay Length: 273 Words / 2 PagesSubmitted: January 6, 2010 -
Analysis of Newspaper Research Report
Analysis of Newspaper Research Report The article, “Rise in Nursery-Product Injuries Baffles U.S. Safety Watchdog”, in bold print in a recent edition of The Wall Street Journal, captured the attention of many readers. The purpose of this paper is to discuss the statistical procedures used in this study, the findings and conclusions used to arrive at this announcement, and the appropriateness of the report. Introduction “Nursery products were involved in 66,400 injuries that sent children
Rating:Essay Length: 1,061 Words / 5 PagesSubmitted: December 23, 2009 -
Analysis of Scientific Report Dealing with Pbdes and Pcdes in the Environment
Analysis of Scientific Report Dealing with PBDEs and PCDEs in the Environment The book “Engaging Inquiry: Research and Writing in the Disciplines” was written by Judy Kirscht and Mark Schlenz to advise scholars on how to write in the following three areas: natural sciences, social sciences and humanities. Chapter 1 of the book, Inquiry and Writing in the Sciences, explains the way Kirscht and Schlenz believe we should write an observational report. To clarify, Kirscht
Rating:Essay Length: 1,253 Words / 6 PagesSubmitted: November 14, 2009 -
Analysis of Three Day Diet
Analysis of Three Day Diet My diet is about 50% carbohydrates, 10% proteins, and 40% fats. This is the reason of why my proposal is what I chose. As you can tell I have not been following my proposal, and I do not like the way my diet is. I have lost around eight pounds since I turned in my proposal. I have been working out more, because of our class time, but I have
Rating:Essay Length: 323 Words / 2 PagesSubmitted: November 18, 2009 -
Analysis of Wage Discrimination in Major League Baseball
Analysis of Wage Discrimination in Major League Baseball Introduction Baseball has become one of the most popular sports in the United States. It became a professional sport since 1960s when the increasing victory led to recruit better players despite their ethnicities. However, since then the issue of unequal salaries among players arose. Many people believe that racial inequality is present in the baseball league. Even in this highly integrated labor market, the minority (non-white) might
Rating:Essay Length: 2,783 Words / 12 PagesSubmitted: November 9, 2009 -
Analysis of Water for Total Coliform Bacteria
Analysis of Water for Total Coliform Bacteria Lab #3 Table 1: Processed Data Source 1 mL 5 mL 15 mL Rinsewater blank 0 0 0 Creek Water 1 11 26 Lake Brittain 0 3 5 Men's Toilet 0 0 0 Creek Water 2 13 12 Turtle Water 7 40 95 Women's Toilet 0 0 0 Creek Water 2 12 39 The table shows the entire class data for lab #3. Three out of eight samples
Rating:Essay Length: 897 Words / 4 PagesSubmitted: February 25, 2010 -
Analyzing Drug Components Using Thin-Layer Chromatography
Tanner Nielsen CHMY 321-011 TA: Jeffrey Richards 11 September, 2015 Lab #1 Analyzing Drug Components Using Thin-Layer Chromatography Introduction: The purpose of the experiment was to identify the components of an unknown analgesic drug tablet and identify the tablet as one of six possible commercial drugs. The six commercial drugs were Advil, Anacin, Aspirin, B.C. Tablets, Excedrin, and Tylenol. Each drug contained 1 or 3 of these substances: Aspirin, Acetaminophen, Ibuprofen, Salicylamide, and Caffeine. Thin-Layer
Rating:Essay Length: 1,078 Words / 5 PagesSubmitted: September 17, 2015 -
Analyzing of a Meal
Many people never think about exactly where the food they are buying came to be at the store or how it was grown. There are few stores that actually list where their products were grown or raised and how they were grown or raised. There are so many products in the store to choose from and each product usually has more than one different brand to choose from. Each of these different brands come
Rating:Essay Length: 1,157 Words / 5 PagesSubmitted: October 17, 2013 -
Analyzing Whistler Blackcomb Holdings Inc.
FMGT 1116 Project 1: Interpreting and Analyzing Financial Statements “Analyzing Whistler Blackcomb Holdings Inc.” Rahul Das Biswas 100217405 19/10/14 Part 1A- A Little Bit about Whistler Blackcomb The company that I will be analyzing in this report is Whistler Blackcomb Holdings Inc. Whistler Blackcomb is traded on the Toronto Stock Exchange, and is North America’s premier four-season mountain resort. The company consists of four season mountain resort businesses, of which Whistler Blackcomb Holdings Inc. owns
Rating:Essay Length: 3,969 Words / 16 PagesSubmitted: March 29, 2015 -
Anatomy
14. Describe the factors that assist the return of systemic venous blood to the heart. Veins carry blood back to the heart. In veins are found valves, thin folds of tunica interna that form flap like cusps. The valve cusps project into the lumen, pointing toward the heart. The low blood pressure in veins allows blood returning to the heart to slow and even back up; the valves aid in venous return by preventing the
Rating:Essay Length: 938 Words / 4 PagesSubmitted: January 16, 2009 -
Anatomy and Physiology of Digestion Paper
Introduction One lovely Saturday morning I sat down hungrily in Chucks to eat breakfast with my friends. After much thought, I decided to make pancakes and eggs, and to have milk to drink. By having these thoughts, the cephalic phase of digestion began. The pancakes, I thought, would cover the carbohydrate and starch groups, and the eggs and milk would cover the lipids and proteins for this meal. Once I had the food in front
Rating:Essay Length: 1,711 Words / 7 PagesSubmitted: July 28, 2017 -
Anatomy Module 4 Tst
Define the following terms: Osteoblast: cell that forms bone Osteocyte: mature cell that is surrounded by bone matrix Osteoclast: cell that contains multiple nuclei and breaks down bone Hematoma: mass of blood that is confined to a certain space Callus: mass of tissue that connects the ends of a broken bone Anatomical Position: when someone stands with their feet forward, arms hanging down at sides, and their palms forward with their thumbs out 2. A
Rating:Essay Length: 413 Words / 2 PagesSubmitted: January 14, 2016 -
Anatomy of Hearing Including Ear Structures and Brain Structures
Anatomy of Hearing including Ear Structures and Brain Structures The ear, an organ for hearing and balance, is anatomically divided into three sections: the outer ear, the middle ear, and the inner ear (Henderson). Each section contains many distinct parts that assist in the task of detecting and interpreting sound which is otherwise known as hearing (Henderson). The outer ear is composed of the auricle (pinna) and the external auditory canal (ear canal) (Sisco). The
Rating:Essay Length: 1,035 Words / 5 PagesSubmitted: February 14, 2010 -
Ancient Greek Science and Astronomy
The Ancient Greek culture has had such an impact on the world that no matter where you look you're sure to find something Greek about it. Out of all the areas that the Greek culture is famous for there are two that tend to exert themselves into our own culture even today. That would be their Science and Astronomy fields. If one were to look up in a library books about ancient Greek science and
Rating:Essay Length: 1,980 Words / 8 PagesSubmitted: April 3, 2010 -
Andrei Sakharov
Andrei Sakharov Andrei Sakharov is often called the father of the Soviet hydrogen bomb, but most people know him as one of the twentieth century’s most ardent and unrelenting champions of human rights and freedoms. It was for his work as an outspoken dissident to the Soviet regime that the Nobel Committee awarded him the Peace Prize in 1975. Sakharov was born in 1921 to a family of Moscow intelligentsia. His father was a
Rating:Essay Length: 995 Words / 4 PagesSubmitted: November 21, 2009