Basics of Magnetism by Ron Kurtus (revised 29 January 2013) Magnetism is a force of attraction or replusion that acts at a distance. It is due to a magnetic field‚ which is caused by moving electrically charged particles. It is also inherent in magnetic objects such as a magnet. A magnet is an object that exhibits a strong magnetic field and will attract materials like iron to it. Magnets have two poles‚ called the north (N) and south (S) poles. Two magnets will be attacted by their opposite poles
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NOT NULL - Indicates that a column cannot store NULL value UNIQUE - Ensures that each rows for a column must have a unique value PRIMARY KEY - A combination of a NOT NULL and UNIQUE. Ensures that a column (or combination of two or more columns) have an unique identity which helps to find a particular record in a table more easily and quickly FOREIGN KEY - Ensure the referential integrity of the data in one table to match values in another table CHECK - Ensures that the value in a column meets
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THE CHEMISTRY OF LIFE (Review 1-7) I. Basic Chemistry A. Elements 1. Definition- an element is a substance composed of a single type of atom 2. Major elements of the human body 3. Trace elements of the body B. Atoms 1. Definition- the atom is the smallest part of an element which cannot be broken down further by ordinary chemical means. Atoms are composed of protons‚ neutrons and electrons. 2. Particles that make up atoms
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The Basics of NMR Chapter 1 INTRODUCTION [pic] NMR Spectroscopy Units Review [pic] NMR Nuclear magnetic resonance‚ or NMR as it is abbreviated by scientists‚ is a phenomenon which occurs when the nuclei of certain atoms are immersed in a static magnetic field and exposed to a second oscillating magnetic field. Some nuclei experience this phenomenon‚ and others do not‚ dependent upon whether they possess a property called spin. You will learn about spin
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into whether the latency‚ or delay between certain keystrokes‚ correlates with the objective measure of programming performance. Controlled experiment was conducted in UWA with a total of 34 participants to test the hypotheses. Complete records of the keys being pressed and the millisecond timing were captured by using a logging tool known as User Action Recorder (UAR). These keystroke data were then recovered into digraphs according to their types. Spearman Rank Correlation Test was performed for each
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Week One Exercise Assignment Basic Accounting Equations 1. Concepts. Jean ’s Marine Supply specializes in the sale of boating equipment and acces¬sories. Identify the Basic items that follow as an asset (A)‚ liability (L)‚ revenue (R)‚ or expense (E) from the firm ’s viewpoint. a. The inventory of boating supplies owned by the company. – Asset (A) b. Monthly rental charges paid for store space. – Expense (E) c. A loan owed to Citizens Bank. – Liability (L) d. New computer equipment
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ANSWERS TO QUESTIONS 1. Sustainable income is defined as the most likely level of income to be obtained in the future. It is the amount of regular income that a company can expect to earn from its normal operations. In order to distinguish a company’s net income from its sustainable income‚ irregular items‚ such as a once-in-a lifetime gain or discontinued operations‚ are reported separately on the income statement. 2. Items (a)‚ (d)‚ and (g) are extraordinary items; item (h) is debatable
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Lab #5: Refraction of Light Theory: Refraction can be defined as the bending of a wave when it enters a medium which causes it to have some reduced speed. In terms of light‚ refraction occurs when the ray passes through some medium which slows its speed; such as water or glass. In this instance the ray tends to bend towards the normal of the medium. The amount of bending or refraction which occurs can be calculated using Snell’s Law (). Objective: To measure the index of refraction of Lucite
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Firestopping Questions and Answers Q: What is a plastic pipe firestop? A: It is a device‚ a material or a combination of materials used to fill or seal a pipe penetration so that the fire integrity of the rated barrier (wall or floor) is maintained whenever it is penetrated by the plastic pipe. Q. How are plastic pipe firestops tested to verify their performance? A. This is done by building a section of wall‚ floor‚ or floor/ceiling assembly with the plastic pipe and firestop in place. The
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are trying to set up a dual boot between Windows XP and Windows Vista‚ which OS do you install first? Windows XP How do you start the process to reinstall an OS on a laptop computer using the backup files stored on a recovery partition? Press a key combination at the beginning of the boot. What are examples of two applications that can create virtual machines? Virtual PC and VMware If you suspect a PC is infected with a virus‚ why is it not a good idea to perform an upgrade installation of
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