Description: This lab-based course is designed to allow students to work like novice scientists. Conceptually‚ students will learn about chemical change‚ how reactions are expressed‚ the mole concept‚ molarity‚ and about the laws that govern gases‚ kinetics‚ equilibria‚ acid-base chemistry‚ and electrochemistry. Methodologically‚ students will learn how to keep a professional notebook‚ perform fundamental chemical techniques such as titrations‚ evaluate their data‚ create tables and graphs‚ and communicate
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2. The American Heart Association (AHA) suggests a healthy balanced meal for diabetics. Half a plate of vegetables‚ a quarter of healthy carbs (complex)‚ and another quarter of lean protein. The National Kidney Foundation suggests the Dash diet. The diet focuses on foods rich in fruits‚ vegetables‚ low-fat dairy products‚ whole grains‚ fish‚ poultry‚ beans‚ seeds‚ and nuts. It is low in salt and sodium‚ added sugars and sweets‚ fat and red meats. American Diabetes Association suggests a diet that
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the form of heat)‚ electrical‚ mechanical‚ chemical‚ radiant‚ or kinetic.
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and its kinetic and potential energy. The kinetic energy of the canister gives you a minimum value for the chemical energy of the combustion reaction. It is a minimum value because energy is lost as heat‚ friction‚ and in other ways. As you work through the procedure‚ consider where the energy is flowing. The overall flow of energy when the canister is launched straight up follows this sequence: Chemical energy: Energy released as heat causes an abrupt pressure rise in the canister. Kinetic energy:
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energy are kinetic energy and potential energy. Kinetic energy is the energy of motion. A ball has kinetic energy when it flies through the air. The ball has the ability to do work in that it can act upon other objects with when it collides. Potential energy is stored energy that objects have because of their position. A cup on a table has potential energy: If you knock the cup off the table‚ gravity will accelerate the cup‚ and its potential energy will convert to kinetic energy. Kinetic energy is
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sphere of mass 10 kg has the same diameter as an aluminium sphere of mass is 3.5 kg. Both spheres are dropped simultaneously from a tower. When they are 10 m above the ground‚ they have the same (a) acceleration (b) momenta (c) potential energy (d) kinetic energy 5. A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g =10 m s–2) (a) 6 ×103 J (b) 6 J (c) 0.6 J (d) zero 6. Which one of the following is not
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The respiratory system of the horse is well adapted to athletic exercise‚ with unrestricted upper airway diameters‚ and a large lung capacity afforded by 18 ribs. These combine to enable air intakes of up to 1800 litres per minute in a galloping horse. Volumes of up to 300 litres of blood are pumped at high pressure through small lung capillaries surrounding 10 million air sacs to take up and deliver over 70 litres of oxygen per minute to the working muscles at the gallop. As a result‚ any restriction
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the Swinging Wonder Recently‚ an American manufacturer developed a scientific demonstrator named « the Swinging Wonder ». Intended for use in schools as an aid in understanding certain principles of Physics or in the home as an educational toy‚ this small demonstrator quickly became an object of fascination for both the science teacher and the layman. The purpose of this device is to demonstrate Sir Isaac Newton’s law of motion‚ in which action and reaction are equal and opposite.
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evaporation. Evaporation of liquids can be explained in the terms of kinetic molecular model although there are strong molecular attractive forces which hold molecules together. The molecules having sufficient kinetic energy can escape into gaseous phase. If such molecules happen to come near the surface in a sample of liquid all the molecules do not have same kinetic energy. There is a small fraction of molecules which have enough kinetic energy to overcome the attractive forces and escapes into gaseous
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n physics‚ energy is an indirectly observed quantity which comes in many forms‚ such as kinetic energy‚ potential energy‚ radiant energy‚ and many others; which are listed in this summary article. This is a major topic in science and technology and this article gives an overview of its major aspects‚ and provides links to the many specific articles about energy in its different forms and contexts. The question "what is energy?" is difficult to answer in a simple‚ intuitive way‚ although energy can
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