three types of particles: protons‚ neutrons‚ and electron. Protons and neutrons are responsible for most of the atomic mass. Example; if a person weighed 150 lbs. approximately 149 lbs. and 15 ounces of that person would be comprised of protons and neutrons while only 1 ounce of their being would be made of electrons. Both the protons and neutrons reside within the nucleus. Protons have a positive charge‚ neutrons have no charge; they are neutral. Electrons reside in orbitals around the nucleus and have
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of Electricity ( pg 296 ) Day 1 Electrostatics - study of static electricity Neutral objects - materials that do not carry a charge Conductors allow charges (electrons) to flow through them easily. E.g. metal Therefore no matter how hard that you rub a metal tap no static charge will build up because the electrons that you are giving the tap just keep on moving up the tap and down the water line until they reach a ground. Insulators do not allow charges to flow through them. The charge
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------------------------------------------------- Electric generator In electricity generation‚ an electric generator is a device that converts mechanical energy to electrical energy. A generator forces electric charge (usually carried by electrons) to flow through an external electrical circuit. It is analogous to a water pump‚ which causes water to flow (but does not create water). The source of mechanical energy may be a reciprocating or turbine steam engine‚ water falling through a turbine
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following as true or false and briefly justify your answers. a. Plant cells without chloroplasts can capture the energy of sunlight. i. False: Chloroplasts are essential to capture sunlight energy. b. Chloroplasts can be seen through a light microscope. i. True: Chloroplasts are large enough to be seen by a LM. 11. List one location in the human body where cells with cilia are found. a. Trachea. 12. Consider a cell with cilia beating on its surface. Identify one other organelle that would
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Lab 3 : Techniques in Microscopy Title : Preparation of light microscope observe cell organisms. Objective : To observe and investigate the cell structure under the light microscope. Introduction A microscope is an instrument used to magnify and resolve a specimen. It is important to know several important features of microscopy which involves magnification‚ resolution and contrast. Magnification is the enlargement of a specimen while resolution is the ability to distinguish detail or the
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1. In the plasma membrane‚ the phospholipid heads A) are hydrophobic and face outward towards the aqueous solution on both sides of the membrane B) are hydrophilic and face inward‚ shielded from water C) are hydrophilic and face outward towards the aqueous solution on both sides of the membrane D) are hydrophobic and face inward‚ shielded from water Points Earned: 0.5/0.5 Correct Answer(s): C 2. The function of chloroplasts is A) lipid synthesis. B) intracellular digestion
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003149 The scanning electron microscope (SEM) employs electron bombardment to image very small specimens. Electron microscopes are used to image specimens that range from 1 nm to 100 µm in size. What is the equivalent in inches? .000000039in to .000003937 in . Show your calculations. 1nm=.000000039in‚ 100nm *.000000039=.000003937in Procedure 1. Parts of the Compound Light Microscope: Refer to a microscope as this section is read. Label the microscope diagram that
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BTN 211 TOTORIAL 1 Chapter 1 1. The History and Scope of Microbiology Which of the following distinguish the field of microbiology from other fields of biology? a. the size of the organism studied b. the techniques used to study organisms regardless of their size c. both the size of the organism studied and the techniques employed in the study of organisms d. neither the size of the organism studied nor the techniques employed in the study of organisms regardless of their size Who of
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two separate points. * An increase in magnification does NOT necessarily mean an improvement in resolution. Ex. A light microscope has a max resolution of 200nm meaning that if two points are closer than 200nm they can’t be distinguished as separate no matter how large the magnification. The electron microscope When a metal becomes very hot‚ some of its electrons gain so much energy that they escape from their orbits. They behave like electromagnetic radiation. They are good forms of radiation
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• Nanomaterial synthesized • <d> 100 to 300 nm in width • Particles are rod shaped. • Homogenous. • Particles length > 1µ Characterization TGA- Of Sample Characterization: Differential Scanning Calorimetry Differential Scanning Calorimetry was carried out on the sample. The following was observed: • Dip in the 50 to 200 range for the dehydration process. This confirms the initial TGA plot • Change at the higher temperatures due to transformation of FePO4
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