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Pole A, whose coordinates are 20 degree N, 50 degree E, is to be rotated about the axes described below. In each case, find the coordinates of the final position of pole A.
A ductile material has a yield strength of 280 MPa. Determine the factors of safety corresponding to yielding for the state of plane stress given below using (a) Tresca Theory and (b) von Mises The
If a 3000 pound vehicle loses traction at 60 mph find the coefficient of friction between the tires and the track. show the free body diagram and the radius of curvature is 450 ft.
A rod has a cross sectional area of 1 cm^2. The material has the following strength characteristics, beyond which the rod breaks:
What error in the pressure drop would ensue if the assumption were made that the flow was laminar, abandoning the previous value of the friction factor.
Air contained in a piston-cylinder assembly is initially at 350 K, 150 kPa and a volume of 0.15 L. As the cylinder is heated to a final volume of 0.50 L, the pressure and volume vary according to th
Air flows steadily through an insulated 5 cm constant diameter duct fitted with a fan. The air enters the suction side of the fan at 27°C, 100 kPa with a velocity of 10 m/s. Two hundred ninety w
Assume that a person is on a roof and that the structure has a circular cross section. If the interface is frictionless and at pheta= 0 rad pheta dot = 0.5 rad/s, at what angle will contact be lost?
Air in a piston-cylinder assembly undergoes a process from state 1, where T1= 300 K, p1= 100 kPa, to state 2 where T2=500 K, p2=650 kPa.
Car A is speeding in the positive x direction and is about to run through a red light and collide with car B ( heading in the positive y direction). At the time of collision va=vai m/s and vb=vbj m/
Calculate the entropy generated in the process, in kJ/K. Use the first law and the second law in your analysis, and assume constant specific heat).
Saturated water vapor at 200 kPa is expanded slowly without friction (i.e. internally reversible). What is the change in specific entropy for the water, in kJ/kg*K?
For a pendulum in a gravity field with point mass m and length L from mass to the pivot, derive the nonlinear equation of planar motion if theta is measured from the vertical (i.e., the equilibrium
A reversible power cycle receives enery Qh from a hot reservoir at Th and rejects enerfy Qc by heat transfer to a cold reservoir at Tc. If Th= 1200 K and Tc= 300 K, what is the efficiency of the powe
As part of the new Bicycle Corps, a solider is pedaling down the road at 25 km/h, holding a missile launcher on his shoulder. The combined mass of the bicycle and the solider is 8o kg, and the singl
The data listed below are claimed for a power cycle operating between hot and cold reservoirs at 1000 K and 300 K, respectively. For each case, determine whether the cycle operates reversibly, irrev
A small bucket of water is swinging above a persons head at a constant angular speed of 10rad/s. The rope is 1 m long, and the combined mass of the bucket and the water is 4kg.
Compute the number of kilograms of hydrogen that pass through a 5-mm thick sheet of palladium having an area of 0.20 m2 at 500 oC.
In order to maintain the same values for Q and change in pressure, by what ratio should the design diameter be increased over its original value to allow for scaling and corrosion?
Assuming complete combustion and the pressure of the products is 90 kPa, determine (a) the percentage of theoretical air used and (b) the dewpoint temperature of the products.
Air contained in a piston-cylinder assembly contains air, initially at 2 bar, 300 K and a volume of 2 m^3. The air undergoes a process to a state where pressure is 1 bar, during which the pressure-v
Steel is coated with thin layer pf ceramic to help protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? Explain.
Explain why the modulus of elasticity of simple thermoplastic polymers, such as polyethylene and polystyrene, is expected to be low compared with that of metals and ceramics.
The outlet area and velocity are 0.001 m^2 and 30m/s and the inlet velocity is 15 m/s. Determine the mass flow rate and the inlet area.
The partition is now removed, and the water expands to fill the entire tank. Determine the entropy change of water during this process if the final pressure in the tank is 40kPa.