Main Show Tank Calculation: The main tank has a radius of 70 feet. What is the volume of the quarter-sphered sized tank? Round your answer to the nearest whole number. You must explain your answer using words, and you must show all work and calculations to receive credit. To find the volume of the quarter shaped tank you would have to use the volume of the sphere using the equation V=4/3(3.14)r^3.
In addition, phenolphthalein was added as an indicator. The aliquots were titrated against sodium hydroxide (NaOH) solution until end point was reached, after which volume of NaOH consumed was recorded. The value of the rate constant, k, obtained was 0.0002 s-1. The experiment was then repeated with 40/60 V/V isopropanol/water mixture and a larger value of k = 0.0007 s-1 was obtained. We concluded that the rate of hydrolysis of (CH3)3CCl is directly proportional to water content in the solvent mixture.
You asked the following question: “I have a 20 story building that has two zones for the standpipe system. If a standpipe system is designed per 7.2.2, does this mean it has two standpipe zones and if so, does the section 7.9 apply and more specifically 220.127.116.11 where it indicates that I need a high level water storage with additional pumping equipment?” In response to your question we have reviewed NFPA 14, 2007 edition that you indicated as the applicable standard. Our informal interpretation is that an auxiliary means for a water supply to the upper zone would apply when the demand exceeds the pumping capacity of the fire department pumper. Section 7.9.4 indicates for systems with two or more zones in which potions of the second and higher zones cannot be supplied using the residual pressure required by Section 7.8 by means of fire
To better understand the proper water flow requirements for an NFPA 25 fire protection systems (FPS) that is installed within a general purpose assembly e.g. auditorium we have to look at NFPA 14. It was first created and issued in 1912 and provided the layout, design and water flow requirements of the three different standpipe systems (Klaus, 2014). They are Class I, II and III. According to Mettauer (2007), a Class I standpipe system provides a 2 ½ inch hose connection for trained personnel or the fire department to use when responding to a fire emergency.
As there was no exact value given, I took the average between the most mentioned intervals. Length of time reaction occurs before measuring Each reaction was allowed 1 minute of reaction time before being placed into cuvettes. (UV-Visible Spectroscopy) Volume of reactants The initial volumes of each reactant was kept constant at 20 cm3 through every manipulation, in order to decrease uncertainty and chances of error. Equipment used Same Spectrophotometer will be used. Method/Procedure: Equipment and Reagent
The crude enzyme was precipitated at 70% saturation of ammonium sulfate, and the protein was collected by centrifugation (10,000×g for 10 min). It was suspended in minimal volume of double-distilled water. The precipitate was dialyzed and used for enzyme purification using column chromatography. The dialyzed sample was loaded on DEAE-cellulose column, which was equilibrated previously with the buffer A (50 mM sodium phosphate buffer, pH 7.4). The column was washed with the five bed volumes of buffer A, and the enzyme was eluted with buffer A
Apparatus- Chromatography column: C18 (10 microns particle size), with Guard column Flow rate: 1.2ml/min Pressure: 30-40kgf Wavelength: 326nm Mobile phase: methanol : water (95:5 v/v) Internal standard: retinyl acetate Injection volume: 20µl Procedure for Retinol extraction from serum samples- 1) 100 µl of serum sample and 100 µl of Retinyl acetate were added into 12 X 100mm glass test tubes. Vortex-mixed for 30 seconds. Then, kept them at 4 C for 5 mins. 2) 1mL of hexane was added and vortex-mixed intermittently for 60 sec. 3) Centrifuged at 2500 rpm for 12 mins.
Water desalination is the way to provide clean and fresh water to use it in either drinking or agriculture. It can be done by using various technologies that are able to extract the unwanted minerals from the seawater to make it clean. A. History of water desalination The process of water desalination has a long and rich history. According to A Short History (2015, p.1), in the ancient Greece, Aristotle and a group of intellectuals marked the beginning of the desalination process.
Then to 25% and to 12.5% and finally to 6.25% To test its impact on the integrity of the membrane Dependent Variable Change in absorbance Absorbance was measured using colorimeter by taking a sample of ethanol To measure the absorbance of ethanol Controlled Variable Temperature ( 37 Celsius) Use water bath of 37 Celsius temperature. Accuracy Time 1 hour the beetroot cores were put in a distilled water for 10 minutes to make sure all the pigments that are released due to the plasma membrane damage are washed away. Total time for trials is 1 hour. The measurements are taken every 10 minutes. To measure the accurate time when the membrane will break Size and type of the beetroot (size of beetroot) Used the same beetroot for the entire experiment.
To conduct our experiment, we used two 20cm glass containers and fill them up with exactly 200 mL of respective salinities. To ensure that no water velocity is influencing the species tested, the water was settled down before moving our snails into the arena. The glass containers had been marked on the bottom to determine the center of the container. All the snails tested were then placed at the marking and were timed for 1 minute 30 seconds allowing 5 seconds for the snails to acclimate the conditions. The path of the snails was then traced using the acetate sheets and after the allotted time the length of the path was measured using a string and a
We came up with 30 different pennies and split them into trials. We ]hypothesized that the more pennies that were added will create a greater volume. Material and Methods Lay out supplies Fill graduated cylinders to 20 mL each Weigh penny trials on weigh boats and balance First trial put 5 pennies in the
Repeat steps 13-16 for two more trials to achieve precise data. Take your beaker of water (150 mL) or ice out of the freezer. Measure 50 mL of water and see if it is 10 degrees celsius (if the water’s temperature is more than 10 degrees celsius, leave it in the freezer longer. If the water is colder than 10 degrees celsius, leave it out to warm up). After measuring the amount of water needed (50 mL), put the beaker of water back into the freezer to maintain its temperature.
Well for starters, the only thing that could really improve the Colorado’s low water levels - besides precipitation - is building a 1,000 mile long aqueduct from the Colombia River, which will never happen. As mentioned before, the problems of the Colorado River cannot be summarized or alleviated by linear solutions. Desalination is not a possibility due to long distances and expensive methods. Building more dams would be a waste of capital because if the precipitation is not abnormally high, then it is pointless. Recycling water is already taking place, but that’s going mostly to meet the treaty with Mexico.
Bellefonte borough council members had met in May to discuss the possible discontinuation of fluoride to its water system. Many local residents and area dentist disagreed with the decision. The decision came following an inspection by the Pennsylvania Department of Environmental Protection. They determined that the authority was not adding the minimum amount of fluoride needed, and in order to add the correct amount, authority costs would increase up to 317,000 according to an estimate from Nittany Engineering and Associates. The authority would have to build a separate facility that includes an emergency deluge shower and storage dedicated solely for fluoride purposes.
In order to do this the scientists will measure the volume of gas that is produced within a 10 second interval time after the tablet begins to react. Then the scientist will observe the different rates of reaction with temperature. The Boltzmann distribution of law, indicates that high temperature makes molecules gain high energy contents (pubs.acs.org/doi/abs/10.1021/ja). In order to measure the reaction rate, the scientists must use the same volume of water at three different starting temperatures: hot tap