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What is the most effective way to wash laboratory glassware? Assume that you have a 1.0 L flask that contains 5 ml, of residual droplets of a 1.0 M NaCL solution. You can rinse the flask with a total volume of 1.0 L of pure water ([NaCI] = 0.000 M). Consider the following options: (o) Fill the Bock up completely once, adding the full 1.0 L of pure water. Shake the flask to mix well, and empty it.
(b) Add one-third of the water, shake to mix, empty, and repeat two more times.
In each case, assume that .5 ml. of the making mixture of clean and dirty water is left after each rinse.
For your answer, calculate the concentration of NaCI that would result in case (a) and in case (b) if the remaining NaCI in the flask were diluted to 1.0 L with pure water. Discuss your results.
Prepare a Mass Haul diagram for the works and prepare a suitable earthworks plan for 3 of the main hauls - As a condition of the contract all available cut material must be used to make up fill embankments before bringing on site any external import..
Find the work, the heat transfer, and the total entropy generation in the process.
A 25-mm-diameter shaft .5 m long is pulled through a cylindrical bearing. The lubricant that fills the 0.3-mm gap between the shaft and bearing is an oil having a kinematic viscosity of 8.0 × 10-4 m2/s and a specific gravity of 0.91.
The space truss shown is supported by a ball-and-socket joint at D and by short links at A and C. Determine the support reactions and the force in each member of the space truss.
The 200-kg block D is dropped from a height h = 1 m onto end C of the A992 steel W200 × 36 overhang beam. If the spring at B has a stiffness k = 200 Kn/m, determine the maximum bending stress developed in the beam.
Successive plus and minus sights taken on a downhil line of levels are listed below. the values represent the horizontal distances between the instrument and either the plus or minus sights. What error results from curvature and refraction?
why the prediction are less than the observed result of connection in tension experiment?
The transmission main from the well field to the community is 2500 ft, the velocity of flow at peak pumping capacity is 3.5 fps, water temperature is 10oC, and pH is 7.5. If free chlorine residual is applied at the well field and is 0.5 mg/L entering..
A cylinder with a 6 in diameter and 12 in length is put undera compressive load of 138.4 kips. The modulus of elasticity for thespecimen is 6500 ksi and Poissons ratio is 0.4. Calculate the final length and the final diameter of the specimen under th..
Project Criteria: How will you assess whether you have met your goals and objectives?
Develop a program that calculates the stagnation pressure and temperature from a static pressure, temperature, and velocity. Assume the fluid is air with constant specific heats. If the inverse relation is sought, one of the three properties in th..
A pump, which has an efficiency of 75%, adds 15 m of head to the flow of 20 L/s of water through a 100 mm diameter pipe. determine The energy that must be delivered by the motor to the pump
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