In the next steps the density of water between 30-40 °C, 40-50 °C and 50-60 °C was measured. Then our results ρ vs T and also density vs temperature values given in the Steam Tables were plotted on the same graph in order to compare. In the second part the density of water was measured by density bottle. The densities obtained from the experiment are 995, 992.5, 991, 990 kg/m3 for the first part and
Some of the factors are thermometer was calibrated to determine its precision. The actual melting points of water, phenylacetic acid, o-anisic acid, and benzilic acid to their observed melting points were determined by calibrated thermometer. Then the solubility tests were run in order to determine the appropriate solvent for the unknown solute (Table 1). After determination of a solute, a vacuum filtration technique was used to determine the pure form of compound. The melting point of the purified sample was determined and compared to the melting points of other known compounds.
Calculations can be found in the Appendices. These valued were used to calculate the percentages needed to determine the water and phosphorus content which can be found in the Appendices as well. Table 1 shows the overall data obtained in the experiment. Conclusion Based from the calculations done the percent moisture was found to be 2.45 ± 0.008%. %P(as received)= 5.8 ± 0.008% and %P(dry) = 5.95 ± 0.008%.
Ohms are measured in Ω, or omega. Voltage is measured in volts, or v. Current is measured in amps, or I. Resistance is measured in ohms, or r. For pipes, voltage would be like the water pressure, current would be like the flow rate, and the resistance would be like the pipe size. The equation to measure voltage is V=IR.A variant of this, Ohm’s law, for measuring resistance, has this
The pocket penetrometer is intended as a lightweight tool for use in the field to examine visual classification of soils. It indicates compressive strength, consistency and penetration resistance. However, the readings attained do not replace test results from a laboratory since a insignificant area of penetration test might give misleading results. (Gerald F. Gifford, Robert H. Faust, George B. Coltharp, 1977) Soil becomes compacted as soil particles are forced to pack more closely together. Mainly through mechanical compression, and this leads to a decrease or total elimination of air pores.
After a period of immersion, the mass of the wet specimens in air was measured. The water absorption of the specimen is calculated from the equation below: Water absorption (%), WA = ((b_2-b_1))/b_2 x 100% Where, b_1= Mass of the oven-dried specimen (g) b_2= Mass of the wet specimen in air (g) IV. RESULS AND DISCUSSION After period of curing is reach, the specimens are taken out for conducted several test. Mortar
About 5 gm of sample was slowly passed along the wall of the funnel till the tip of the pile formed and touches the bottom of the funnel. A circle was designed around the sample base and the radius of the powder cone was measured. Angle of repose was determined from the average radius using the following formula14, 15 θ = tan-1 (h/r) Where, θ = angle of repose h = height of the pile r = average radius of the powder cone. 6.4.2. Bulk Density: Apparent bulk density was determined by placing pellets into measuring cylinder and
PRACTICAL 4 Materials and Methods Measurement of DNA concentration The most common technique to measure DNA concentration is measurement of absorbance. We had used 1:20 dilution of the DNA sample and the reading was expected to be in the range of 0.1-1.5 OD260. 5µl of DNA and 95µl of PBS buffer were mixed together and inserted into a clean cuvette. Then it was put inside the spectrophotometer. The measurement was taken at 230nm, 260nm and 280nm.
The resistance was measured by using Scientific Programmable 4½ digit Digital Multimeter (SM5015). Once steady state was achieved, recovery of sensor was recorded by exposing the sensor to air. This was done by opening both the valves V1 and V2 of the chamber simultaneously. At the same time, the vacuum pump was switched on. Valve V1 allowed fresh air to enter into the chamber while valve V2 allowed the gas to exit the chamber.