Olympic games‚ Usain Bolt from Jamaica holds the world record for the 100-meter dash. A normal human would struggle to complete his rigorous training‚ yet Bolt trains daily‚ spending “90 minutes in the gym every day” (Citation). He focuses on speed and agility‚ core strengthening‚ and weight training during those ninety minutes. Examples of his power-filled workout include reverse crunches‚ box hops‚ cable knee drives‚ medicine ball slams‚ barbell lunges‚ sled drag‚ and more. Bolt performs each action
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EXTRACTION OF METALS SUMMARY Most metals exist in compounds in rocks in the Earth’s crust. Many of these ores contain oxides or sulphides of the metals. The compounds need to be reduced to produce the metals as elements. Metals are very useful to us because of their special properties. Reduction means removal of oxygen or gain of electrons. Carbon is a good chemical reducing agent because it readily combines with oxygen‚ but it is only useful for the metals below it in the Reactivity
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runs 161 m south‚ so that the magnitude of the ostrich’s resultant displacement is 226 m. Calculate the magnitude of the ostrich’s eastward component and its running speed to the east. 1. Kangaroos can easily jump as far as 8.0 m. If a kangaroo makes five such jumps westward‚ how many jumps must it make northward to have a northwest displacement with magnitude of 68 m? What is the angle of the resultant displacement with respect to north? 2. In 1926‚ Gertrude Ederle of the
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Matt R Results & Analysis Part 1: 1.) To determine the density and composition of a penny it must be first weighed on a scale. Find the average mass of multiple pennies from the same year. After weighing it find the volume by placing the pennies into a 50 ml beaker with 15 ml of water. Note the change in volume to obtain the volume of the pennies‚ obtain the average volume‚ and then calculate the density by dividing the mass of the penny by the volume. 2.) To keep measurements accurate and precise
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The brass alloy we are experimenting on is called Muntz Metal. Muntz metal is 60% copper‚ 40% zinc and a hint of copper [http://en.wikipedia.org/wiki/Muntz_metal] (accessed 4/10/12). Muntz metal was developed as an alternative to expensive‚ heavy copper. It is comprised of about 60% copper and about 40% zinc‚ with a small amount of iron. The finished product actually is considered a form of brass‚ but it has maintained its name of Muntz metal. [http://www.wisegeek.com/what-is-muntz-metal.htm] (Accessed
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PHYSICS INTERNAL ASSESSMENT How to measure the density of water using graphical method? Name: Chia Yee Xin Candidate Number: Session: October 2014 School: Sri KDU International School Research Question: To measure the density of water using graphical method. Introduction: Water is the most abundant compound on the Earth and it covers about 70% of the Earth’s surface. Water is a transparent fluid which forms the world’s streams‚ lakes‚ oceans and rain‚ and is the major constituent of
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Record responses in med blue bold font Student Exploration: Density Experiment: Slice and Dice Define Vocabulary Density: The degree of compactness of a substance Mass: A coherent‚ typically large body of matter with no definite shape Matter: The substance or substances of which any physical object consists or is composed Volume: The quantity of three-dimensional space occupied by a liquid‚ solid‚ or gas Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. What do
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Resources‚ Conservation and Recycling 21 (1997) 145–173 Metals recycling: economic and environmental implications Robert U. Ayres * INSEAD‚ Boule6ard de Constance‚ F-77305‚ Fontainebleau‚ France Received 17 July 1997; accepted 27 July 1997 Abstract We are in a period of economic transition. The ‘cowboy economy’ of the past is obsolescent‚ if not obsolete. Environmental services are no longer free goods‚ and this fact is driving major changes. Recycling is the wave of the (immediate) future
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formation‚ displacement‚ and sublimation. Listed are the defense mechanisms used by the ego to avoid recognizing ideas that cause anxiety‚ and can be considered‚ negative coping strategies for stress. J.K. Rowling stated‚ “According to Madam Pomfrey‚ thoughts could leave deeper scars than almost anything else.” Sigmund Freud would support this statement‚ dissecting the true impact thoughts can leave on a person using his found defense mechanisms. One Freudian defense mechanism‚ known as displacement‚ is
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Determining an enthalpy change of a displacement reaction Aim: To determine the enthalpy change for the displacement reaction between zinc powder and copper (II) sulphate solution. Zn (s) + Cu2+ (aq) → Cu2+ (s) + Zn2+ (aq) Theory: For the displacement reaction‚ an excess amount of zinc powder is added to the measured amount of aqueous copper (II) sulphate. The temperature change over a period of time has to be measured and thus‚ the enthalpy change for the reaction can be measured. The equation
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