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An SAE steel wire (1mm diameter) is coated with another cover to form a composite material with diameter of 2 mm.
a) determine the elastic modulus of the composite material;
b) determine the maximum force that the composite will carry before either material yeilds.
Material Elastic modulus (GPa) Yeild stress (MPa)
cover 220 140
steel 205 280
A Brayton cycle with a regenerator uses air as the working fluid. The air enters the compressor at 283K and 0.1 MPa. The highest temperature in the cycle is 1073K and the pressure ratio across the compressor is 8.
A lagoon with volume 1500 mg/m3 has been receivingsteady flow of non-conservative waste (reaction rake k = 0.20/day)at a rate of 125 m3/day for a long enough time to assume that steady- state conditions apply. The wasteentering the lagoon has a conce..
Slider A moves in the horizontal slot with a constant speed v = 1.90 m/s for a short interval of motion. Determine the angular velocity of bar AB if the displacement xA = 90 mm, and the length L = 440 mm.
The cost of extending a certain road is $850,000. Resurfacing and other maintenance are expected to cost $175,000 every 3 years and lasts for 96 years. What is the present worth of the road at an interest rate of 6% per year (over that period)
The spring loaded supporting rods AB and AC in the figure below aer used as shock absorbers for transporting fragile loads. Knowing that the elastic spring constants for the rods AB and AC are kab = 1.2 kN/m and kac = 1.5 k N/m
What is the magnitude of the maximum stress that exists at the tip of an internal crack having a radius of curvature of 5.5× 10-4 mm (2.165 ×10-5 in.) and a crack length of 3.5 ×10-2 mm (1.378 × 10-3in.)
For a given hypothetical flow, the velocity from time t=0 to t=5 seconds was u=2 m/s , v=0. Then, from time t=5 s to t=10 s, the velocity was u=+3 m/s, v=-4 m/s. A dye streak was started at a point in the flow field at time t=0
In Chlorine disinfection (3-log reduction in Giardia- Cysts), determine the water pH for a contact time of 90 minutes using a chlorine concentration of 2 mg/L at 20 degrees C
a municipal landfill has available space of 16.2 ha at an average depth of 10 m.seven hundred sixty-five (765)m^3 of solid waste is dumped at the site 5 days a week.
Given that the max shear strength of the the concrete shore is 10 kPa and the engineer requires a F.S. of 2.5, find the required are of concrete for the thrust block.
The specific heat (C sub p) of aluminum is 0.214 calories per gram degrees Celsius (0.214 cal/g-C). If a cube of aluminum with a mass of 13.6 kg exhibits a change in temperature of +30 degrees Celsuis, what is the resultant thermal energy
Determine the clean filter head loss in a filter bed composed of 0.3 m of uniform anthracite (with an average size of 1.6 mm) placed over 0.3 m of uniform sand ( with an average size of 0.5 mm) for a filtration rate of 160 L/m^2.min.
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