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1.During the manufacturing process, a circular steel bar of diameter20mm and length of 1.2m is subjected to an axial load P. Themodulus of elasticity of steel is 207 GPa. The steel bar mustacquire an elastic strain energy of 14J. Find yield strengthfor a factor of safety of 3 with respect to plasticdeformation.
2.Two shafts are made of the same material and are of equal lengths.one of them is solid and another one is hollow. the ratio ofinside and outside diameters for hollow shaft is 0.65. They are subjected to the same torque and same maximum shearstress. Determine the ratio (Ws/ Wh) of the weight of the solid shaft (Ws) to the weight of the hollow shaft (Wh)
When working with flow through pipes , engineers typically have to determine if the flow is laminar or turbulent. Compute the Reynolds number for each of the cases below and determine if the flow is laminar or turbulent. Assume all of the conduits..
Office workers complain that the noise level in their office Area 1 is greater than that in the company's other office Area 2. Six measurements are made on different days in each area, with the following results
What is the terminal settling velocity of a particle with a specific gravity of 1.4 and a diameter of 0.01 mm in 20 degrees celcius water. What is the smallest diameter particle of specific gravity 1.4
During frequent braking under race conditions the disk brake rotors on the car described above reach a temperature of 500C. These disk brakes rely on forced convection to cool them. The dimensions of each disk rotor are: outer radius 130mm
Granny viola has been saving money in the Bread and Butter mutual fund for 15 years . She has been a steady depositor over those years and has a pattern of putting $100 into the account every 3 months.
A solid steel sphere with a specific gravity of 7.85 and diameter of 0.02 m is falling at its terminal velocity through water at 25 °C. Using either trial-and-error or a graphical approach, determine the velocity of the sphere
Total stress analysis is usually preferred for construction of embankments and for excavations, we use effective stress analysis, but why? Total stress is Undrained strength of the soil
A simple steam power plant operates at steady state with water circulating through the components with a mass flow rate of 100 kg/s. Stray heat transfer, kinetic energy and potential energy effects are negligible.
A rectangular channel carries discharge of 10 m^2/s per unit width, with a sluice gate. Calculate the flow depth y3, if a hydraulic jump forms downstream of the sluice gate when y1 = 20 m.
A site is underlain by a soil that has a unit weight of 118 lb/ft^3. From laboratory shear strenght tests that closely simulated the field conditions, the total stress parameters were measured to be C_T=250 lb/ft^2
A 10-year hurricane is subjected to occur at a given region. Determine the probability that: a) Only one such hurricane occurs within the next 10 years; b) no such hurricane occurs within the next 10 years
Estimate the energy required to raise the temperature of 2 kg (4.42 lbm) of the following materials from 20°C to 100°C (68°F to 212°F): aluminum, steel, soda-lime glass, and high-density polyethylene.
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