time 300‚ and 600 seconds were used to find the slope and equation of the graph. The graph had a negative slope and the equation of the line was y= -0.0028x - 0.8692. Theory The theory behind this experiment is to investigate the natural convection from a sphere‚ using lumped system analysis. A lumped system analysis is used to determine the convective heat transfer of lumped objects‚ having negligible internal resistance as compared to the external flow resistance‚ the temperature is assumed
Premium Convection Heat transfer Heat
Meteorological Phenomena 1) The dipping duck 2) Galileo’s thermometer 3 Light engine 4) Willy-willy 5) Dust Storm 6) Cloud Colour 7) Global dimming 8) Temperature Inversions 9) Sun Halo 10) Water Evaporates below Boiling Point 11) Why sky is blue below 30km & black above 12) Why is temperature max reached after noon 13) Fog (glasses question) 14) Ozone hole in spring 15) What makes mountains in distance appear blue 16) Temperature range with latitude 17) When there is dew‚ there
Premium Fog Water vapor Precipitation
each atom act as weights and the bonding electrons as springs in an oscillator model. Non-bonding electrons may also be present‚ however in an ideal solid these electrons are not involved in carrying current. By extension‚ S1 contains no electronic conduction bands. The non-bonding electrons may be involved in Van der Waals (or contact) interactions between atoms. Given these restraint‚ it is clear that S1 is a non-metal. Ideal solids do not exist. However‚ graphite provides a close approximation
Premium Temperature Energy Heat
Minerals Eight most abundant elements in the Earth’s Crust: Abundance % by weight – Most common Ionic Form Most Common Coordination Numbers Relative Ionic Size Oxygen (O) 46.6 % O-2 - - - 1.40 Silicon (Si) 27.7 % Si+4 Si (4) 0.26 Aluminum (Al) 8.1 % Al+3 Al (4‚ or 6) 0.39 Iron (Fe) 5.0 % Fe+2 Fe (6) 0.63 Calcium (Ca) 3.6 % Ca+2 Ca (8) 1.00 Sodium (Na) 2.8 % Na+1 Na (8) 0.99 Potassium (K) 2.6 % K+1 K (8‚ 12) 1.37 Magnesium (Mg) 2.1 % Mg+2 - - - 0.72 Distinction between crystalline and non-crystalline
Premium Volcano Lava Basalt
NETWORK NANAref is able to support your business operations around the world. The company provides a reliable and efficient supply of high quality products along with top notch customer support. Using our global knowledge and expertise‚ we are able to follow your business around the world. Plants NANAref operates 18 production facilities in 16 countries and manufactures a range of over 1‚000 reference formulas with constant quality thanks to an integrated industrial capability based on benchmarking
Premium Management Marketing Strategic management
1. INTRODUCTION The sun is the largest source of renewable energy and this energy is abundantly available in all parts of the earth. It is in fact one of the best alternatives to the non-renewable sources of energy. Solar energy has been used since prehistoric times‚ but in a most primitive manner. Before 1970‚ some research and development was carried out in a few countries to exploit solar energy more efficiently‚ but most of this work remained mainly academic . After the dramatic rise in oil
Premium Energy development Water Nuclear power
intuitive feel for discretization before going on to write code. Two applications are described. The first is a twodimensional conduction problem that is introduced to show how Solver can be used to solve systems of finite difference equations. The second demonstrates the solution of the incompressible NavierStokes equations using the staggered grid formulation. The conduction problem is one that is easily incorporated into an undergraduate heat transfer class‚ while the flow problem is appropriate
Premium Fluid dynamics Fluid mechanics
Heat and mass transfer through a Porous medium in a concentric annulus with Radiation effect 1 2 N.B.V.Rama deva prasad‚ Assistant professor in Mathematics‚ Sri Balaji P.G.College‚ Anantapur‚ Dr.P.Raveendra Nath‚ Assistant professor‚ Department of Mathematics‚ Sri Krishnadevaraya University College of Engineering and Technology‚ S.K. University‚ Anantapur - 515 003‚. Abstract We discuss the free and forced convection flow through a porous medium in a coaxial cylindrical duct where the boundaries
Premium Fluid dynamics Heat transfer Heat
lemonnier@cea.fr herve.lemonnier.sci.free.fr/TPF/TPF.htm ECP‚ 2011-2012 HEAT TRANSFER MECHANISMS • Condensation heat transfer: – drop condensation – film condensation • Boiling heat transfer: – Pool boiling‚ natural convection‚ ´bullition en vase e – Convective boiling‚ forced convection‚ • Only for pure fluids. For mixtures see specific studies. Usually in a mixture‚ h xi hi and possibly hi . • Many definitions of heat transfer coefficient‚ q ‚ h[W/m /K] = ∆T 2 hL Nu = ‚ k k(T ?) Condensation
Free Heat transfer Heat
Answers Chapter 1 1 a) 8 m/s 2 a) 10 500 m (10.5 km) b) 105 000 m (105 km) c) 630 000 m (630 km) 4000 s (Snails can actually move faster than this! At a more realistic 4 mm/s (0.004 m/s) it would only take the snail 400 s or 6 minutes 40 seconds.) 4 a) graph D b) graph C c) graph A d) graph B a) 8m distance = = 32 m/s 0.25s time The car is moving at constant velocity (speed). 5 IGCSE Physics Answers – Section A 3 6 gradient
Premium Energy Force Kinetic energy