**Surface Mine Blasting Office of Surface Mining**

Mining Blasting Enginee1 3 Parkway Center Bureau of Mines Surface Mine Blasting Research and recent developments in both methods

Historical background, Basic principles and mathematical ideas. Measurement, BET in modern research, Conclusions, Heat exchange at the liquid He. solid metal interface, Acoustic mismatch causes weak. Ratio cl cs 0 05 3, Photons that can cross the Kapitza resistance RK 3. boundary 1 105 Q AT, I M Khalatnikov An introduction to the theory of.

Superfluidity 1965 Benjamin, S W Van Sciver Helium Cryogenics 1986 Springer. Maximizing the surface, Sintering of silver powder. Named after Stephen Brunauer P H Emmet and, Edward Teller. Developed in 1938, They were working on ammonia catalysts. First method to measure the specific surface of, finely divided and porous solids.

Applications, Pharmaceuticals, Projectile propellants. Medical implants, Adsorption, Consequence of surface energy The energy is minimized. in the bulk when every atom molecule is surrounded by. Adsorption, Physisorption determined by Temperature. Gas pressure, Interaction between, surface and gas e g. vapor pressure, Surface area, Monolayer adsorption Langmuir isotherm.

Multilayer adsorption BET theory, Sorption Isotherms. Classification after IUPAC 1984, Types II IV and VI can be measured by BET method. interaction adsorptiv adsorbent adsorptiv adsorbate. Types III V have weak interactions between gas and adsorbent. Assumptions, 1 Homogeneous surface, 2 No lateral interactions between molecules. 3 Uppermost layer is in equilibrium with vapor phase. 4 First layer Heat of adsorption, Higher layers Heat of condensation. 5 At saturation pressure the number of layers becomes. BET theory, At equlilbrium, si Surface area covered.

Ei by i layers, ai psi 1 bi si e RT p Pressure, Ei Heat of Adsorption. a b Constants, Total surface area of the sample A the total volume adsorbed. v and the volume of gas adsorbed when the entire surface is. covered with, A si v v0 isi v m v0 A, Where v0 is the volume of gas adsorbed on 1 cm2 when it is. covered by a complete unimolecular layer, BET theory. From this BET derived the, BET equation, p0 p 1 c 1 p p0.

A more convenient form is, the following, v p0 p vm c vm c p0. E ADS ECOND, c e RT E ADS ECOND, S Brunauer et al JACS 60 309 319 1938. Volumetric measurement, v p0 p v m c v m c p0, Measurement cycle to obtain equilibrium pressure and amount of. gas adsorbed, Gas N2 O2 CO2 Krypton He methane, Other methods. Single point measurement, ratio p p0 0 03, Volume of gas adsorbed vm.

Flow deflection measurement, Gravimetric measurement. BET and CNT s, Peigney et al CARBON 39 507 514 2001. First method to measure the specific surface of finely divided and porous solids Applications Pharmaceuticals Catalysts Projectile propellants Medical implants Filters Cements Adsorption Consequence of surface energy The energy is minimized in the bulk when every atom molecule is surrounded by neighbors Adsorption Physisorption determined by Temperature

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Mining Blasting Enginee1 3 Parkway Center Bureau of Mines Surface Mine Blasting Research and recent developments in both methods

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Surface to Surface Radiation Benchmarks Randy van Eck Michiel Klep and Jos van Schijndel Eindhoven University of Technology Corresponding author P O Box 513 Eindhoven Netherlands A W M Schijndel tue nl Abstract The paper presents a student guide on how to implement surface to surface radiation within COMSOL Multiphysics 5 2 for case studies found within the built environment The paper

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Surface Downwelling Shortwave Radiation rsds Surface Upwelling Shortwave Radiation rsus Surface Downwelling Clear Sky Shortwave Radiation rsdscs Surface Upwelling Clear Sky Shortwave Radiation rsuscs Surface Downwelling Clear Sky Longwave Radiation rldscs 1 Intent of This Document and Point of Contact POC 1a This document is intended for users who wish to compare satellite based

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apps and your favorite Windows 7 programs with the security and manageability you expect from a PC About this guide We hope this guide helps you get the most out of your Surface Pro or Surface Pro 2

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Find the lateral area and surface area of each right prism 1 2 Find the lateral area and surface area of each right cylinder Give your answers in terms of 3 4 Lateral and Surface Area of a Right Prism Lateral Area The lateral area of a right prism with base perimeter P and height h is L Ph Surface Area The

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Valid Kentucky MET or West Virginia EMT card B Furnished by DM person conducting certification training 1 Coal Mine Safety Laws of Virginia 1999 Edition 2 General Coal Miner Study Guide 3 DM BCME 1 Form 4 DM BCME 3 Form 5 General Coal Miner Study Questions a Underground study questions if applicant wants GMUO underground only this includes surface area of underground mine b

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Landscape area is almost always presented in terms of planimetric area as if a square kilometer in a mountainous area represents the same amount of

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Analyse Optimum Volume and 1 6 Surface Area Estimation and other informal methods of optimizing measures such as surface area and volume oft en lead to reasonable

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10B Surface Area and Volume 10 4 Surface Area of Prisms and Cylinders Lab Model Right and Oblique Cylinders 10 5 Surface Area of Pyramids and Cones 10 6 Volume of Prisms and Cylinders 10 7 Volume of Pyramids and Cones 10 8 Spheres Lab Compare Surface Areas and Volumes Ext Spherical Geometry Spatial Reasoning KEYWORD MG7 ChProj Solid Gold

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Lesson 1 How Surface Area and Volume Change Strand Geometry Mathematical Objective s In this lesson surface area and volume will be reviewed as well as converting measurements from one unit to another Mathematics Performance Expectation s Problem Solving Decision Making and Integration 6 Use formulas for surface area and volume of three dimensional objects to solve real world problems

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50 Block 2 Surface Area And Volume Surface Area BLoCK 2 surFACe AreA And VoLuMe surFace area make a set of solids See page for details netting A cuBe

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Lesson 17 From Nets to Surface Area Student Outcomes Students use nets to determine the surface area of three dimensional figures Classwork Fluency Exercise 5 minutes Addition and Subtraction Equations Sprint Refer to the Sprints and the Sprint Delivery Script sections of the Module Overview for directions to administer a Sprint