Separating a Mixture Aim: To separate the components of a mixture of sand and salt. To carry out a gravimetric analysis to calculate the percentage of both components. Equipment: * Electronic Scale | * Evaporating Basin | * Beaker | * Bunsen Burner | * Glass Stirring Rod | * Filter Funnel | * Wire Gauze Mat | * Filter Paper | * Heat Resistant Mat | * Conical Flask | * Safety Glasses | * Tripod | * Matches | Tongs | Risk Assessment:
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Student ID No: ___________________ Pages: 9 Questions: 5 EXAMINATIONS FOR DEGREES AND DIPLOMAS October-November 2008 Mechanics of Solids First and only paper Time Allowed: THREE (3) hours Instructions: Answer all questions. -2- Question 1 Figure 1 Two circular A-36 steel1 rods are connected as shown in Figure 1. The rod CD has a diameter of 30mm. Both members are pin connected together at C (see figure detail). You are asked to determine: a b Identify what kind of structural
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For D I.A = 180(n-2)n 144n = 180n – 3 D = n2 (n-3) D = 702 144 = 180(n-2)n -36 n = -360 D= 102(10-3) D = 35 144n = 180 (n-2) n = 10 2D = 10(7) Answer: D = 35 #21. The ratio of areas between two similar triangles is 1:4. If one side of the smaller triangle is 2 units‚ find the measure of the corresponding side
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Prof. Ioan Kosztin Lecture #23 Solid State Physics • Bonding in solids (metals‚ isolators‚ semiconductors) • Classical free electron theory of metals • Quantum theory of metals • Band theory of solids • Semiconductors • Lasers Classification of solids • Phases of matter: • solid (well defined shape and volume) • liquid (only well defined volume) • gas (no defined shape or volume) • plasma (an overall neutral collection of charged and neutral particles) • Solids • crystalline (atoms form a regular
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BASIC SEPARATION TECHNIQUES Contemporary modifications of filtration and dialysis use a matrix-based fibrous material that provides a mechanism of separation in many homogeneous immunoassays. These materials may be coated with specific antibody-ligand to foster selection of specific materials or species. Certain labels use magnetic particles in conjunction with strong magnets to effect separation. Basic universally used separation mechanisms‚ outside of those incorporated in immunoassay‚
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The Solid State General characteristics of solid state: Definite mass‚ volume and shape Short intermolecular distances Strong intermolecular forces Fixed lattice positions of the constituent particles Incompressibility and rigidity Classification of the solid state: Crystalline Amorphous (sometimes called pseudo solids or super-cooled liquids) Differences between the crystalline and amorphous solids Crystalline Have definite characteristic geometrical shape Melt at a sharp and characteristic temperature
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Impacts of solid waste on health The group at risk from the unscientific disposal of solid waste include – the population in areas where there is no proper waste disposal method‚ especially the pre-school children; waste workers; and workers in facilities producing toxic and infectious material. Other high-risk group include population living close to a waste dump and those‚ whose water supply has become contaminated either due to waste dumping or leakage from landfill sites. Uncollected solid waste
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Chapter Objectives Understand how to measure the stress and strain through experiments Correlate the behavior of some engineering materials to the stress-strain diagram. Copyright © 2011 Pearson Education South Asia Pte Ltd In-class Activities 1. 2. 3. 4. 5. 6. 7. Reading Quiz Applications Stress-Strain diagram Strength parameters Poisson’s ratio Shear Stress-strain diagram Concept Quiz Copyright © 2011 Pearson Education South Asia Pte Ltd TENSION AND COMPRESSION TEST Copyright
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Unit Project Documenting the Scientific Method Separating Mixtures Project Separating Mixtures: How can you separate salt water to make pure and drinkable fresh water? Design and build a device to separate a mixture of salt water into its components. For example‚ what device could you build to get the most drinkable water from salt water if you were on a stranded island in the middle of the ocean? Gather data on the amount of water collected and the purity of the water‚ which can
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* Cube In geometry‚ a cube is a three-dimensional solid object bounded by six square faces‚ facets or sides‚ with three meeting at each vertex. As the volume of a cube is the third power of its sides ‚ third powers are called cubes‚ by analogy with squares and second powers. A cube has the largest volume among cuboids (rectangular boxes) with a given surface area. Also‚ a cube has the largest volume among cuboids with the same total linear size (length+width+height). * Parts:
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