Category: Physics

Technological advancements scriptIntroduction:NAME ChrisWelcome to war stories. in this episode we will discuss tanks and tea bags.What you probably know about the first world war is that it was a bloody war with a lot of casualties. in fact over 41 million. What you probably didn’t know is that the war also was a time of great technological advancements. As was the case in world war two or any war, the first world war has seen some great inventions that we are still using every day. The entire country focussing on winning the war proved to be a good way […]

 The tight-binding approach to the problem ofthe electronic energy levels in solids is intuitively very charming. Atight-binding method using a few interaction parameters describes precise resultsfor the valence bands of the diamond and zincblende crystals. The tight-bindingmethod is equivalent to that of Slater and Koster. These consist phononfrequencies at high-symmetry points, bulk point defects such as vacancies andinterstitials, and surface reconstructions. The TB parametrization rehabilitatesexperimental measurements and ab initio calculations well, indicating that it defindedfaithfully the underlying physics of bonding in silicon. We used this model tothe investigate of finite temperature vibrational properties of crystallinesilicon and the electronic structure of […]

IntroductionWe tend to decide some things or believesome things because of or on bases of strong historical reasoning. However,this reasoning is shared knowledge thus it gives rise to assumptions. Uponconsidering our personal knowledge from the shared knowledge we have received,we are inclined to assume the future results and hence we take decisions consideringthese assumptions as uniformities – and to be real. An assumption can be stated as apowerful imagination, which we trust to be true. The power of assumption canmake anything possible just the way an imagination can make anything seem real.The difference between both is that one is done […]

 Question 1: Describethe differences between compressible and incompressible flows. 1.      A flow in which the density of each fluidelement remains constant is noted to be incompressible. If the fluid iscompressible, the density is a non-constant function of the pressure,temperature, phase and composition of the fluid. Another difference betweencompressible and incompressible fluids is the manner at which the fluidresponds to a force input and the way that forces are transmitted through thefluid. For a compressible fluid, force input does not result in an immediateflow. The fluid compresses near the location of the force and the densityincreases locally near the location of the […]

In physics, escape velocity is the minimumone directional speed needed for an object to escape from the gravitational forceof a massive body.The escapevelocity from Earth is about 11.186 km/s (25,020 mph) at earth’ssurface. Moreover, escape velocity is the speed at which the sum of anobject’s kinetic energy and its potential energy is equal tozero. Object which has achieved escape velocity is not on the earth’s surface,not in a closed orbit of any radius.AnalysisLetRadius of Earth=R=6. 4*mMass of Earth=M= 5.9736*kgMass of projectile=mVelocity of projectile=Gravitational constant = G = 6.67*NCentre of Earth = oPoint on the Earth’s Surface=ADistance from point O to P= xDistance from point P to Q=dx         Solutions Suppose that theplanet […]

JouriAlSharhanJanuary19, 2018 Phase1 ExerciseBicycle Wheel Wheelsare used to provide a more reliable way of transportation rather than having todrag things through rough surfaces. They reduce friction and provide leverage.(“How Do Wheels Work? | Science ofWheels and Axles.” ) Bicyclewheels are typically over 20 inches in diameter, which is taller than most carwheels. The wheels support therider’s entire weight, mainly due to the way they are formed. The wheels ofbikes are made of a strong hub, a thin rim, and approximately 24 spokes in hightension. Spokes are the connecting rods found between the bicyclehub and the rim. (“Bicycle Spokes.”). The use […]

Aim: to investigatethe relationship between the pressure with a fixed mass of air and the volumeof gas with a fixed temperature.Underlying Physics:Pressure is defined as force per unit area. When air is confined to a smallspace and the particles will bounce off the walls and off of one another. Theforce caused from these collisions is called pressure. The general equation forpressure is- P=F/AP= pressure (Pa) F= force (N) A= area (cm3)The smaller thesurface area the greater the pressure because air is made up out of lots ofsmall particles so imagine the air has been trapped in a container/cylinderwith a piston […]

ReportCaoZheng18th/Dec/2017GrapheneIntroduction Graphene, an allotrope form of carbon which consists a single layer of carbon, which atoms arranged in an hexagonal lattice. It is a basic and auxiliary component of numerous other allotropes of carbon such as graphite, charcoal, fullerenes and carbon nanotubes. Graphene can be imaged as an aromatic molecule with indefinitely size. Numerous surprising properties are found in graphene. For instance, graphene is the most strongest material among ever tested, with nearly transparent efficiently conducts heat and electricity. Graphene demonstrates a huge and nonlinear diamagnetism, which is more prominent than the diamagnetism of graphite, and can be suspended by neodymium […]

While this seems to be a crucial part of the arts, it is also applicable to many other areas in our lives, with religion and faith being one of them. When beginning to have faith in any given religion, the ideas are abstract and essentially invisible, and it is not until these ideas are explained, and sustained, that people begin to say what they believe in is real. This is similar to a theatrical experience, as audience’s disbelief is never immediately suspended, it takes time. In this sense, suspension of disbelief becomes an essential element of faith, and when faith […]

Aboodh Decomposition Method and its Applications inSolving Linear and Nonlinear Schrodinger Equations Linear and nonlinear Schrodinger equations often arise inmany branches of physics and engineering science suchas in quantum mechanics, optics and plasma physicsamong others. The study of these equations and theirsolutions has become of great interest to manyresearchers due to its various applications. To cite a few,Wazwaz 1 utilized the Adomian decomposition methodas a reliable technique for treatment of Schrodingerequations. In Wazwaz 2, the variational iteration methodwas used to determine the exact solutions for both linearand nonlinear Schrodinger equations. Also, Zhang et al3 used the He’s frequency formulation as a […]