DETERMINATION OF SOFTENING POINT STANDARD IS: 1205 – 1978. DEFINITION Softening point is the temperature at which the substance attains a particular degree of softening under specified conditions of test. APPARATUS • Standard Ring and Ball Apparatus. • Steel balls 2 No, each 9.5mm in diameter and weighing 3.5 + 0.05 grams. • Brass rings 2 No, the rings shall be tampered and shall confirm to the following Depth: 6.4 + 0.1mm Inside diameter at bottom: 15.9 + 0.1mm Inside diameter at top: 17
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Evaluation of Solid Propellant Burning Rates Solid propellant burning rate is a fundamental characteristic and the metric commonly chosen to evaluate the performance of any propellant composition. In relation to the aerospace industry, solid propellants are burned in a laboratory setting at different pressures reminiscent of those seen in real rocket motors, and the resulting of burning rates are plotted as a function of pressure. According to Biblarz and Sutton [5], burning rate and pressure are
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The average temperature for the environment covered with no microscope slides was 33.4 C, the average temperature for the environment covered by 1 slide was 33.2 C and the average temperature for the fully enclosed, taped box (environment) was 32.2 C. The collected data appears to show almost the opposite of what was predicted by the hypothesis (the hypothesis predicted that the fully enclosed environment would be hotter than the opened/uncovered environments). Evidently the hypothesis was proven
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concentration over 400ppm What will Rachel Notley and Justin Trudeu do? What does CO2 over 400ppm mean? Ppm mean parts per million, which mean in every 1 million of unit of substance, there is 1 unit of substance presents. In simple words, in I Kg of gas, there is 1 microgram of CO2. How does the value 400ppm being measured? The CO2 concentration value 400ppm, is measured in Mauna Loa observatory, Hawaii. Mauna Loa is chosen as the measuring spot as it is far from any human activities, and it is high
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Keep It Liquid Introduction: The objective of this lab was to witness the change in temperature of cyclohexane with different substances added. The process of phase change is usually being witnessed in the different weather changes we have. When snow begins to fall in the winter it falls as a liquid, starts to freeze from the atmosphere, then fully freezes when it is set on the ground from the winter temperature. It then begins to melt and turn back into a liquid as the temperature begins to heat
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that describes the phase spectrum. Starting with the zero phase wavelet that effect of increasing amounts of the linear phase shift on a zero-phase wavelet. Although it is not changing the sign of the slope in the phase spectrum the wavelet that can be shifted in the opposite time direction. Rc = V 2 ρ 2 − V 1 ρ 1 / V 2 ρ 2 + V 1 ρ 1 2.2 where V 1 , ρ 1 and V 2 , ρ 2 are the velocities and densities of the upper and Lower layers. If a 90-degree
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Grace Dammen Altitude Sickness Biology Honors 1st Quarter Project For every 1,000 feet ascended in elevation, there is a 3% oxygen decrease. Altitude sickness, formally known as Acute Mountain Sickness or high altitude pulmonary edema.occurs when there is lack of oxygen supply in the air due to high elevation. Altitude or elevation increases when sea level gets farther away
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3. INTRODUCTION Organic compounds are isolated either from natural sources or from reactions mixtures. These compounds are seldom pure and are usually contaminated with small amounts of other similar compounds, which are found to exist together or formed during the reaction. In order to characterize them, it is important to purify them. 4. PROCESSES FOR PURIFICATION 1. Crystallization 2. Sublimation 3. Distillation 4. Chromatography 5. Differential Extraction 6. Qualitative Analysis 5. 1. CRYSTALLIZATION
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De Ocampo, Yves Aaron Julian, Dela Vega, Roderick R. Jr., Elguira, Cedric Tristan D. Enriquez, Joanne B., Gabat, John Elliot Group 5, 2D Medical Technology, Faculty of Pharmacy, UST ABSTRACT Sublimation is a change directly from the solid to the gaseous state without becoming liquid. In this experiment, we used the process of sublimation to purify the impure benzoic acid. We obtained from 5.00 g to 2.30 g of the sublimate compound. After we purify the acid we collected the pure and sublimate
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In this experiment, sublimation was used to purify solid mixtures. The compound used to undergo purification is impure benzoic acid. The product obtained after the heating process is called the sublimate in the form of crystals. The weight of the impure benzoic acid gave a lot of difference from the sublimate obtained from 5.0014 g to 0.3213 g, respectively. Thus, the measured sublimate showed the low percentage recovery of the said compound. The sublimate was then subjected to melting point determination
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