Science
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4,609 Essays on Science. Documents 3,241 - 3,270
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Psycology
Method Subjects: The two subjects for our experiment were first year male students from commerce program attending University of Toronto at Mississauga. Both subjects were nineteen years of age, and of South Asian decent. Apparatus: The experiment was conducted on a Macintosh computer using a program called “Problem Solving”. Ten words were from food category, whereas, other ten words were from random categories. Four lists of five 5-letter words were created (appendix A). The maximum
Rating:Essay Length: 626 Words / 3 PagesSubmitted: January 20, 2010 -
Puberity
ЎЬ Different types of cells are formed ЎЬ In month one, embryo is Ёщ inch long and very light ЎЬ In month two, embryo is Ёц inch long ЎЬ In month three, fetus is 1 and Ёц inches long ЎЬ Nervous system is made ЎЬ Formation of arms, legs, and fingers ЎЬ Formation of heart and face ЎЬ Shape of body is formatted ЎЬ In month 4, the fetus is 3 inches and weighs one
Rating:Essay Length: 348 Words / 2 PagesSubmitted: December 1, 2009 -
Public Health and Economy
Physical Medicine PHYSICAL MEDICINE PHYSICAL MEDICINE also called PHYSIATRY, PHYSICAL THERAPY, OR REHABILITATION MEDICINE, medical specialty concerned with the treatment of chronic disabilities and with the restoration of normal functioning to the disabled through physical modes of treatment, such as exercise. This specialized medical service is generally aimed at rehabilitating persons disabled by pain or ailments affecting the motor functions of the body. Physical medicine is one means employed to assist these patients to return
Rating:Essay Length: 3,507 Words / 15 PagesSubmitted: March 25, 2010 -
Public Key Encryption
________________ Public key encryption is derived from asymmetric encryption. Asymmetric encryption is defined as the following: “form of encryption where keys come in pairs. What one key encrypts, only the other can decrypt. Frequently (but not necessarily), the keys are interchangeable, in the sense that if key A encrypts a message, then B can decrypt it, and if key B encrypts a message, then key A can decrypt it.” (Public-Key Cryptography) while public key encryption
Rating:Essay Length: 1,067 Words / 5 PagesSubmitted: January 23, 2018 -
Pulleys Lab
Daniel Nam March/5/2017 BLK: 3 Pulleys Lab Question How do Pulleys effect the input/output of a system? What is the ideal mechanical advantage of a system? Concept In an ideal system of pulleys, all the energy is transferred from the input to the output without any losses to friction and other forces. Theoretically the efficiency of a system should always be 100% but in real life applications it will always be less than 100% due
Rating:Essay Length: 730 Words / 3 PagesSubmitted: October 29, 2017 -
Pump Performance Laboratory
1 INTRODUCTION 1.1 Background And Motivation There is a vast engineering application of turbomachinery ranging from aircraft engines to steam turbines. Turbomachinery refers to a group of machines which rotate, such as fans, turbines, and pumps. These machines are divided into two groups: (1) those that extract energy (turbines) and those that add energy to the fluid (pumps). Turbomachinery is a common application in engineering where fluid machinery design is of interest, where the pump
Rating:Essay Length: 3,599 Words / 15 PagesSubmitted: March 9, 2010 -
Purification of an Ester
Introduction ESTERS are compounds derived from the reaction of a organic acid with an alcohol. Acid + Phenol/alcohol --> ester + water R--C=O + R'--OH ----> R--C=O + H2O | | C-OH C-O-R' Esters are the compounds that give fruits their characteristic flavours and odours. ie. methyl salycilate is "Oil of Wintergreen". http://www.petrik.com/PUBLIC/library/misc/glossary_of_org_chem.htm#ESTERS Aim To synthesise the ester 3-methylbutyl ethanoate( isopentyl acetate) and to identify the product by its boiling point. Method The ester was
Rating:Essay Length: 510 Words / 3 PagesSubmitted: February 17, 2010 -
Purification of Green Fluorescent Protein
Title: Purification of Green Fluorescent Protein Introduction: Transformation is used to introduce a gene coding for a foreign protein into bacteria. Hydrophobic Interaction Chromatography (HIC) is used to purify the foreign protein. Protein gel electrophoresis is used to check and analyze the pure protein. Research scientists use Green Fluorescent Protein (GFP) as a master or tag to learn about the biology of individual cells and multicultural organisms. This lab introduces a rapid method to purify
Rating:Essay Length: 1,903 Words / 8 PagesSubmitted: March 7, 2010 -
Purifying Acetanilide by Recrystallization
Purifying Acetanilide by Recrystallization Four test tubes of 13x100 were obtained and labeled “Acetone”, “Water”, “Ethanol”, and “Petroleum Ether.” Approximately 100 mg of Acetanilide and 2.0 ml of appropriate solvent were added in each test tube. The test tubes were stirred thoroughly. After stirring, it was observed that in which solvent acetanilide is insoluble at room temperature. The insoluble test tubes were heated to boiling using the sand bath and were cooled to room temperature.
Rating:Essay Length: 272 Words / 2 PagesSubmitted: January 7, 2010 -
Putting Aside Pesticides
Putting Aside Pesticides There are 2.5 billion pounds of pesticides being applied to agricultural products each year in the United States. This is ten times more than was applied forty years ago. It is still unknown as to what type of exact effects these chemicals may have on individuals. Some farmers that have been using pesticides in their fields and developed leukemia are finding that the cause of their disease is from inhaling pesticides. These
Rating:Essay Length: 528 Words / 3 PagesSubmitted: March 11, 2010 -
Putting Theory into Practice
Running Head: PUTTING THEORY INTO PRACTICE Putting Theory into Practice: Utilization of Henderson’s Nursing Theory in Everyday Nursing Practice Health care around the world and especially in the Western world, has undergone extreme changes over the past few decades, however, the basic principles of nursing such as caring for the sick and elderly have remained the same. Many of those principles come from the teaching of Virginia Henderson. Her interactional theory of holistic care has
Rating:Essay Length: 2,791 Words / 12 PagesSubmitted: June 9, 2010 -
Q&a Dangerous Fats Lurk in Seemingly Healthy Snacks
1. What is another name for "trans fatty acids"? Trans fatty acids are also known as hydrogenated vegetable oil. 2. Why do manufacturers use trans fatty acids? Trans fats make pastries flaky and cookies fresh tasting 3. What are some sources of trans fatty acids (i.e., foods that contain them)? Prepared foods including granola bars, microwave popcorn, crackers and cookies contain trans fatty acids 4. Do most products currently list the amount of trans fatty
Rating:Essay Length: 566 Words / 3 PagesSubmitted: March 4, 2010 -
Q. Critically Evaluate the Use Of: the Leisure Ability Model and the Health Promotion/protection Model.
Therapeutic Recreation Assignment Shane O'Rourke Year 4 Rec Man 20006284 Q. Critically evaluate the use of: The Leisure Ability Model and the Health Promotion/Protection Model. Justify the use of one of these models for an individual with Spinal Chord Injuries. Before discussing both models we must understand what therapeutic recreation (t.r) is. Morrow (1980) defined t.r as “a process wherein recreation experiences are used to bring about a change the behaviour of those individuals with
Rating:Essay Length: 3,206 Words / 13 PagesSubmitted: November 13, 2009 -
Quagmire
“Paper 2” Quagmire Sometime this summer or maybe late fall, news programs will be filled with images of catastrophic wildfires ravaging forests in the American West. If the trend continues from the last five fire seasons, homes will burn to the ground causing hundreds of millions of dollars in property damage, millions of acres of public lands will be stripped of their value, and thousands of part-time fire fighters will unnecessarily risk their lives,
Rating:Essay Length: 1,194 Words / 5 PagesSubmitted: March 2, 2010 -
Qualitative Analysis Discussion
DISCUSSION: Qualitative analysis is used to determine the presence of cations or anions present within a sample and their impurities. Information known, such as chemical and physical properties, about cations and anions can be used to determine what steps should be used to separate the sample into one, specific ion. Qualitative analysis involves forming and decomposing complex ions. Qualitative tests are very sensitive, allowing to detect a very small amount present in sample. Due to
Rating:Essay Length: 869 Words / 4 PagesSubmitted: November 11, 2009 -
Qualitative Research Critique
QUALITATIVE RESEARCH CRITIQUE Qualitative Research Methods Research Article Critique By: Eman Harb November 14, 2018 Supervised by: Prof. Lubna Abushaikha Introduction The purpose of this assignment is to critically assess a study by Barimaniin, et al 2015, which aimed to investigate mothers’ perceived satisfaction with AC, PC and CHC, the researchers used a cross sectional and mixed method approach to guide their study, the study results show that all links in the chain of care
Rating:Essay Length: 1,063 Words / 5 PagesSubmitted: November 17, 2018 -
Quality Assurance
One of the major health care challenges, both in the hospitals or nursing homes have always remained falls among elderly patients, especially in patients with dementia or Alzheimer’s. Some of them are preventable, some are not. Nursing homes and hospitals are spending a huge amount of money on prevention or post fall care every year. Fall is one of the quality indicators assessment used by the Department of Public Health to evaluate nursing homes.
Rating:Essay Length: 325 Words / 2 PagesSubmitted: November 10, 2009 -
Quality Issues in Project Management
QUALITY ISSUES IN PROJECT MANAGEMENT 1. Introduction There are a number of issues surrounding the general area of “quality” in project management. You will need to be aware of some of the requirements of PRINCE (or PRINCE2) as well as the more general aspects of the ISO 9000 and 14000 series. 2. Quality requirements as part of PRINCE PRINCE2 (Projects in Controlled Environments) was revised from PRINCE in 1996 and is the accepted standard for
Rating:Essay Length: 875 Words / 4 PagesSubmitted: December 10, 2009 -
Quantitative Analysis: % Copper in an Ore
Quantitative Analysis: % Copper in an Ore May 3, 2006 Abstract: In this experiment we were given an unknown sample of ore. Using the spectrophotometric analysis and the electrogravimetric analysis, we found the unknown percentage of copper in the unknown sample of ore was to be 17.6% by mass. Introduction: Chemical analysis takes place under two different scenarios. In one case, you need to find out the chemical identity of some material. The first kind
Rating:Essay Length: 513 Words / 3 PagesSubmitted: May 31, 2010 -
Quantum Computers
It was around 25 years ago, at the time Intel was developing its first microprocessor, when Gordon E. Moore prognosticate that every 18 months the number of transistor per microprocessor would double and therefore the cost per each function would drop by half in the same period of time (Moore’s Law). Till nowadays, Moore’s law has proved to be very accurate. Actually it is accepted that the improvement rate defined by his law will continue
Rating:Essay Length: 1,217 Words / 5 PagesSubmitted: June 12, 2010 -
Quantum Computing - Yes, No, or Both?
Quantum Computing ЎV Yes, no, or both? In the technology world today, humans are so infatuated about having the latest computer out. What they consider to be a high tech machine is speed. To accomplish this it has to do with the size of transistors on a microprocessor. More than 40 years ago, Gordon Moore, Ў§one of the founders of IntelЎЁ made a Ў§prediction that the complexity of integrated circuits would double every two years.ЎЁ
Rating:Essay Length: 536 Words / 3 PagesSubmitted: December 2, 2009 -
Quantum Mechanics
Quantum Mechanics is the science of subatomic particles and their behavior patterns that are observed in nature. As the foundation of scientific knowledge approached the start of the twentieth century, problems began to arise over the fact that classic physical ideas were not capable of explaining the observed behavior of subatomic particles. In 1913, the Danish physicist Neils Bohr, proposed a successful quantum model of the atom that began the process of a more defined
Rating:Essay Length: 775 Words / 4 PagesSubmitted: December 9, 2009 -
Quantum Mechanics
In the article, “Reaching for the Sun,” the main point is that a spectroscope has helped scientist discover many elements throughout our atmosphere. Joseph von Frauenhofer was a glass cutter apprentice that mastered making glass after his apprenticeship. He enhanced the quality of glass and ended up manufacturing the best optical equipment in the world. In 1802, Frauenhofer discovered when sunlight passed through a prism, a colored spectrum of light occurred. Gustav Kirchhoff and Robert
Rating:Essay Length: 306 Words / 2 PagesSubmitted: January 20, 2010 -
Quantum Physics for Dummies
Imagine this: In a steel box is a cat, as well as a poison with a 50% chance to kill the cat within the hour. One hour later, without opening the box, you must tell whether the cat is alive or dead. The correct answer is… both. This experiment is a simplified version of the Thought experiment of Shrӧdinger’s Cat, and a good introduction of one of the first fundamentals of quantum mechanics, Superposition. Superposition
Rating:Essay Length: 663 Words / 3 PagesSubmitted: September 26, 2016 -
Quantum Vs. Classical Mechanics
Classical and Quantum mechanics are the two main fields of mechanics in physics. Classical mechanics came a few hundred years before Quantum mechanics. Subsequently it is less accurate and less reliable then the more recent mechanic field of Quantum mechanics. Despite being outdated, Classical mechanics can still be used for many everyday problems with bigger and slower moving objects. However, when dealing with extremely fast moving or small subatomic particles a Classical approach will not
Rating:Essay Length: 573 Words / 3 PagesSubmitted: May 18, 2010 -
Quenching of Fluorescence
Quenching of Fluorescence: Use of the Stern-Volmer Equation Introduction Excitation of some chemical compounds when radiated with visible or UV light results in electronic transitions to higher energy levels. The extent to which light of various wavelengths absorbed constitutes the absorption spectrum of the compound. The spacing between levels in the two electronic states can be measured by either absorption or emission spectroscopy. Emission occurs following an absorption event if the upper state is not
Rating:Essay Length: 569 Words / 3 PagesSubmitted: December 8, 2009 -
Questions
QUESTIONS 1. Solubility of a solid depends on which of the following factors? I. The kind of solid II. II. Pressure III. Temperature IV. IV. The kind of solvent A) I-III B) II-III C) III-IV D) I-II-III E) I-III-IV 2. Which of the following effects increase the rate of dissolving of sugar in water? I. To grind the sugar II. To apply pressure on water III. To stir sugar IV. To heat water A) Only
Rating:Essay Length: 883 Words / 4 PagesSubmitted: May 22, 2010 -
R.C Time Constant
Abstract This experiment was split up into two separate investigations. The aim of the first investigation was to calculate the time interval for a capacitor to be discharged to 37% of its original value through a resistor. This result is known as the time constant of the decay, given the Greek letter (t). From my results I plotted a graph of ‘Exponential decay of voltage against time’, the value I obtained in this investigation
Rating:Essay Length: 1,966 Words / 8 PagesSubmitted: March 26, 2010 -
Rabbit Tobacco
My grandmother grew up in Americus, GA, a rural town over 100 miles south of Atlanta. Her parents were of Cherokee descent, so I asked her about any herbal remedies passed down to her. She told me of several, but the one that she remembered with the most clarity was rabbit tobacco. Rabbit tobacco is also known as lasting, everlasting, sweet balsam, white balsam, feather-weed, and sweet cudweed. Its scientific name is Gaphalium obtusifolium. These
Rating:Essay Length: 426 Words / 2 PagesSubmitted: June 7, 2010 -
Rabies
Though rabies has been documented since before the birth of Christ, the recent deaths from rabies of four people in the United States, who had received transplanted organs from a man infected but not actively suffering from the disease, show that the rabies continues to be a virulent and silent killer of people. Scientists speculate that rabies first appeared in Africa or Asia as five other viruses related to rabies are isolated there. As early
Rating:Essay Length: 756 Words / 4 PagesSubmitted: December 24, 2009