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A 1400 kg car, initially at rest, is raised on a hydraulic lift that accelerates upward at 0.9 m/s2. What work does the lift perform on the car after it has been raised 1.8 m?
Determine: (a) the thermal efficiency of this power plant (b) the thermal efficiency of stem is superheated at 600°C instead of 350°C.
For the element at point A, draw a cub that shows the states of stress and use Mohr's circle to compute the principal normal stresses for this location.
Glycerin at 20 c flows with a velocity of 4m/s through a 30 diameter tube , the air velocity is to be 2 m/s. What tube diameter is required for the model if dynamic similarity is to be maintained be
Estimate the maximum power that can be transmitted for a seven (7) year design life of 40 hours/week for 48 weeks/year with 99.9% reliability. Consider tooth bending failure only, using a factor of
Assuming that the flow is adiabatic and that the kinetic energy of the steam at the inlet is negligibly small, determine the inlet temperature if the inlet pressure is 300 kPa.
Determine the distance h it must descend for it to reach a speed of v2 = 2 m/s. Also, what is the angle of descent theta, that is, the angle measured from the horizontal to the tangent of the path.
Two-dimensional, steady flow in the neighborhood of a planar stagnation point (located at x=0, y=0) is described by the following velocity components. Obtain an expression for the pressure field, p(
Assuming there is one vacancy per 1000 unit cells in this metal at 20 degrees Celsius, estimate how many vacancies there are per 1000 unit cells at 1020 degrees celsius?
Calculate the static pressure at the proposed inlet location. Express the pressure rise above ambient as a fraction of the freestream dynamic pressure.
At steady state, a 15-W curling iron has an outer surface temperature of 90 degrees Celsius. For the curling iron, determine the rate of heat transfer, in kW, and the rate of entropy production, in
A fountain runs on an electric motor and water pump. Estimate the pressure supplied by the pump and the electrical power needed by the motor.
A frictionless, incompressible steady flow field is given by V = 2xyi - y2j in arbitrary units. Let the density be ?0 = constant and neglect gravity.
Gamma titanium aluminide is subjected to a stress of 50000 psi. If the material is to be limited to 0.2% creep strain, how long can this material be used at 1100 degrees farenheit?
Determine (a) the amount of energy per unit surface area directed on the slab surface and (b) the thermocuple reading after 60 seconds has elapsed.
What is the yield strength. What is the tensile strength. What is the elastic strain at the yield point. What is the % elongation.
Design a controller which moves the height of the liquid level from 0 to 1 with: 1.) No steady-state error 2.) An overshoot less than 10% 3.) Settling time less than 4 s.
One way to manufacture transistors, which amplify electrical signals, is to diffuse impurity atoms into a semiconductor material such as silicon. Calculate the concentration gradient in atomic perce
A fatigue test is made with a mean stress of 17500 psi (120 MPa) and a stress amplitude of 24000 psi (165 MPa). Calculate (a) the maximum and minimum stresses, (b) the stress ratio.
A Ti-6A1-4V alloy contains an internal through crack of 1.90 mm. What is the highest stress (MPa) that this material can withstand without catastrophic failure?
What is the applied stress that will cause fracture if the component contains an internal crack 0.13 inches long? Assume Y=1.
Determine the critical crack length for a through crack contained within a thick plate of 7075-T751 aluminum alloy that is under uniaxial tension.
Evaluate these effects in terms of deleterious effects per kwh produced. Do the effects scale directly with the number of kwh produced?
Determine the maximum angle 'theta' for which equilibrium is possible. From the position determined in(a) calculate the force P required to rotate the bodycounterclockwise.
Determine the change in specific entropy of the refrigerant, in kJ/kg-K. Can this process be accomplished adiabatically?