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- Relate viscosity to strength of IMFs among liquid moleculesWhat is a fluid? Discuss some examples of fluids and give an example eachDraw a graph (not to scale) depicting the relationship between shear stress and shear rate of the fluids discussed aboveDescribe what happens to blood at both low and high shear rates.What is the law that differentiates Newtonian fluids from Non-Newtonian fluids?The measurement of flexural modulus over a wide range of temperatures of a thermoplastic elastomers is given in the following figure; According to the figure which of the following statement/s is/are true. 1. At very low temperatures, i.e., below the glass transition of the elastomeric phase, both phases are hard, so the material is stiff and brittle. II. Above the Tg of the elastomeric phase, hard phase of the material softens and is elastic, resembling a conventional vulcanized rubber. II. As the temperature increases, the modulus stays relatively constant (a region referred to as "rubbery plateau") until the point where the hard phase softens or melts. A Only I B Only I Il and II D land II Bu Soruyu Boş Birak
- which of the following would have the highest viscosity at a temperature and pressure where all are liquid? Rn, He or Ne?Describe how does a fluid offer viscosity flux? Explain the effect of temperature and pressure on viscosity of fluids.4. An alloy has an elastic modulus of 115 GPa. For the alloy, plastic deformation begins at a stress of 275 MPa. (a) If a sample of cross-sectional area 325 mm? is obtained from the alloy, determine the maximum load that may be applied on the sample without plastic deformation. (b) The original sample length is specified as 115 mm, what is the maximum length to which the sample can be stretched without plastic deformation.
- What is the surface tension of benzene(in micro-Newton/m), if it rises to a height of 1.06299 inch in a capillart tube with a circumference of 1.570796 mm. The density of benzene is 54.477 lb/ft³. With the contact angle to be 0°.A single crystal of silver (FCC structure) is oriented such that a tensile load of 1,000,000 N is applied along the [001] direction. The single crystal is cylindrical and has a radius of 18 cm. The slip system for the FCC crystal structure is 111〈110〉. Using the FCC unit cell below, sketch a (111) plane and, using arrows, indicate two different 〈110〉 directions within this plan. Compute the resolved shear stress (in MPa) in the [101] direction on the (111) plane. If the critical resolved shear stress is 2.0 MPa, will the crystal yield? (explain how the answer is obtained1.At -185°C and 1 atm ethane (MW = 30.07 g/mol) exists as a solid with a FCC structure. Using the data provided below: E/k=194.1K, bo=0.1794 m3/kmol Determine the diameter of one molecule of ethane (in angstroms). 2. What is the void fraction? 3. Find the density of the solid etahne. 4. Calculate the distance of separation (in m) between two ethane molecules when the potential energy is at a minimum. 5. At the separation distance calculated in part (4), determine the minimum value of the potential energy between two molecules (in J).
- Viscometer is used to measure the viscosity of a series of dilute solutions of a polymer in toluene at 30°C. (1) Intrinsic viscosity is the most useful of the various viscosity designations because it can be related to molecular weight by the Mark-Houwink-Sakurada equation, [n] = KM. Calculate the viscosity average molecular weight for this polymer by using the data given in Table 2. Given that the Mark-Houwink constant, K is 12 x 10-5 dl/g and a = 0.71. 0.505 0.595 0.804 Concentration 0 (g/dL) Flow time (s) 67.94 0.402 107.70 121.05 Table 2 132.77 161.39 1.207 227.8427)Viscosity inscresses with increasing pressure true or falseA) The contact angle for water on clean glass is close to zero. Calculate the surface tension of water at 20 C given that at that temperature water climbs to a height of 4.96 cm in a clean glass capillary tube of internal radius 0.300 mm. The density of water at 20 C is 0.9956 g cm-3. B) What change (if any) you will expect for surface tension in A if the contact angle will be between 10 º and 20 º?