Urban heat island

here first and second term in the equation (3) represents coulomb potential whereas last term is exchange-correlation potential. The exchange and correlation effects were taken in to account by using PBE-sol exchange correlation technique for treatment of electronic interactions in ZnGa2S4 and CdGa2S4 crystal compounds. The aim behind adoption of PBE-sol exchange correlation technique is that it recoups the prime gradient expansion for exchange and jallium surface potential are exactly…

experiment, the rate of vaporization does not matter. The objective of this experiment is to determine the experimental heat of vaporization and compare it to the accepted heat of vaporization of water (40.7 kj/mol). The molar heat of vaporization is the amount of energy required to vaporize one mole of a liquid at one atm and the symbol ∆ Hvap is used. The process by which the molar heat of vaporization is calculated is though the slope of a graph. The volume of…

the membrane, flashing and insulation material, sealant and roofing accessories. Roofing accessories such as adhesives and primers are mostly used along overlapping edges to form an unbreakable joint between the sheets. The other alternative is using heat welding to transform all the assorted pieces into a large single roofing cover. Before any cost estimates are made for installing a TPO roofing system, it is important to first inspect the site. The cost of labor may vary depending on the work…

Intervention Project: Healthy Eating and Exercising The behavior that I would like to change is eating healthier and exercising. For the past two years I have lived a sedentary life. I used to exercise four times a week for at least an hour. I have gained over 30 pounds in the past 2 ½ years. Right before I gained this weight, I was informed by my primary care physician that I was 20 pounds overweight for my height. It was not as if I wanted to gain weight, but my morale to exercise was gone…

Introduction The refrigerator is a common household appliance that is an essential food storage technique in developed countries; it is made up of compartments which are thermally insulated and also has a heat pump which can be mechanical, electronic or chemical. The heat pump is a device which transfers heat from the interior of the fridge to an external environment, this means that the fridge is cooled to a temperature which is below the ambient temperature of the room that it is in. the…

current travels along through the filament, the free electrons are constantly collding into the molecules that make up the filament. The energy of each collision causes the atoms to heat up, which is due to the electrons being excited. A thinner conductor is less resistant to the movement of electrons and would therefore heat up more quickly versus a thicker conductor. As previously stated, when these excited electrons fall back to their normal levels, the electrons release the extra energy in…

Solution growth deposition This technique consists essentially of inserting the substrate into a solution containing hydrolysable metal compounds and pulling it out at a constant speed into an atmosphere containing water vapour. In this atmosphere, hydrolysis and condensation takes place. Finally the films are hardened by a high temperature cycle to form transparent metal oxides. Any hydrolysable compound including halides or nitrates but preferably metallo-organics are suitable…

Theory: Boyle’s Law states that when temperature (T) is kept constant, pressure (P) and volume (V) have an inversely proportional relationship. Boyle’s constant (B) can be expressed by V=B/Pwhere volume is (in this lab) cm^3 and pressure is in atm. Charles’ Law states that when pressure is held constant, temperature and volume are directly proportional. Charles’ constant (C ) can be expressed by V=CTwhere volume is in cm^3 and temperature is in Kelvin. Gay-Lussac’s Law states that when…

Bernoulli’s law is derived from the energy conservation between “kinetic energy and static energy associated with pressure” of an ideal fluid (Encyclopaedia Britannica, n.d.). An ideal fluid is a fluid with a steady flow, incompressible, does not generate heat and has no angular momentum (Brown, S n.d). W…

Thermal effect results from the change in the heat capacity of the gases in the combustion chamber. It is worth mentioning that EGR contains water and CO2 which have higher specific heat capacity than air. The change in absorbing heat is proportional to the added mass, to the heat capacity at constant pressure and to the difference in temperature between the EGR and the combustion temperature. ΔQ=Δm*Cp*(Tcom-Tegr) The change in specific heat capacity results from charge dilution and represents…