Dark energy

Energy transfer in a refrigeration system. Coefficient of performance of a refrigerator is the ratio of: The method of plotting P-h cycle diagram: 1. By noting the following procedures, the P-h cycle diagram can be plotted: (i) Condensing pressure…

Also, with the increase of temperatures, there was an observation of increasing kinetic energy, vibrations within Iron(III) phosphate that led the distance between tetrahedral Fe-O to contract. When the temperature reaches 980K, the researchers could conclude that 980K is the temperature that results in the transition of Iron(III) phosphate…

Sultra the Vixen is a combination curling iron, hot air brush and dryer all in one sleek and beautiful volumizing package. While some other hot air brushes need to be used on slightly damp hair, or require product on dry hair, the Vixen uses hot air to heat the ceramic barrel. This creates a combination of hot air brush and curling iron that can be used on dry or damp hair. Instead of spending over an hour sectioning, blow drying, and curling your hair, you can achieve a beautiful blowout look…

INTRODUCTION: Exercise 3.1 - Osmosis: Toward the start of lab, we found out about diffusion which can happen as active transport or passive transport. Diffusion is known as delivering a net development of solute particles from locales of higher focus to districts of lower concentration. Active transport is the development of an atom over the plasma layer. Active transport is when atoms move against their focus slopes. We discovered that dynamic transport requires vitality, and the motivation…

The SEM produces a largely magnified image by using electrons instead of light to form an image. A beam of electrons is produced at the top of the microscope by an electron gun. It consists of an electron gun to produce high energy electron beam. A magnetic condensing lens is used to condense the electron beam and a scanning coil is arranged in-between magnetic condensing lens and the sample. The electron detector (Scintillator) is used to collect the secondary electrons and can be converted…

3.2 N2O decomposition over Cs-doped Cu50Ce50Ox catalysts Fig.8. Conversion of N2O over different Cs-doped Cu50Ce50Ox catalysts Conditions: 2600 ppm N2O, balance He, 0.3 Mpa, GHSV-19,000 h-1. Fig.9. The T50 and T100 of different Cs-doped Cu50Ce50Ox catalysts The activities of the catalysts with different Cs content for N2O decomposition are shown in Fig.8, and the T50 and T100 (the temperature at which 50% and 100% conversion of N2O decomposition is achieved) are shown in Fig.9. It’s found…

2.2. Instrumentation The residual concentration of metal ion in the filtrate were analyzed by GBC, Sensaa Series Atomic Absorption Spectrometry (computerized AAS) with air-acetylene flame under the optimum instrumental conditions as shown in (Table 1). The solution pH was measured using digital pH meter (Hanna instrument model HI 8519, Italy). Fourier transform infrared (FT-IR) spectra were measured on Nicolet is 10 FTIR spectrometer in the range of (4000 to 400 cm-1). Scanning electron…

Mathematical model Heat and mass transfer properties of counter flow wet cooling tower are obtained through the balance of mass and energy equations. The assumptions made for deriving the governing equations are listed below [14, 15]: • Heat and mass transfer take place only normal to the flow direction. • Heat transfer to the environment through the walls are negligible. • Heat transfer from cooling-tower fan is negligible. • Specific heats of water and dry air are constant. • Heat and mass…

electricity from one end to another. It hinders the free flow of electrons from atom to atom and molecule to molecule. This is because the electrons are tightly bond to the atoms leaving no space for there to be any free electrons to transmit electrical energy. Examples of insulators are glass, rubber, wood and paper. Conductor is an object or type of material that can transmit heat, sound, light or electricity. It does this by allowing electrons to flow freely from particle to particle. This is…

Abstract The paper present the investigation on the effect of temperature, time and current density on surface roughness in electropolishing process on 316L stainless steel. The cathode material under study was 316L stainless steel. The electrolyte was composed of sulfuric acid, phosphoric acid, and DI water. Full factorial design method was used. ANNOVA technique has been used to assess the quantitative influence of the different process factors of the EP. The surface roughness will be…