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For a certain material, failures were reported after 3000 hours at 650 C and 186 hours at 700 C when loaded at 250 MPa. If the same stress were applied at 750 C, how long would the sample be expect
If the maximum axial stress allowed in the wood piles is 51 MPa (in compression), what is the maximum deck load that this damaged pile can support?
Determine the change in the rate at which the following quantities enter and exit the tube: (a) the combined thermal and flow work, (b) the mechanical energy.
Calculate the amount of work input a refrigerator needs to make ice cubes out of a tray of 0.25 kg of liquid water at 10C.
Steady-state creep rate data are given for an alloy taken at 474 K with the activation energy for creep of 140,000 J/mole.
We wish to calculate the mass of steam required per unit mass of incoming liquid. The heater is assumed to be well insulated.
Develop an equation for the volume of the oil as a function of the height from the surface of the oil to the top of the wooden cylinder when it is placed in this stratified fluid column.
Evaluate the various methods of how safety is measured and the current safety data systems, and compare and contrast their capabilities and limitations in measuring safety.
Assuming a window can withstand up to 25 lbf what is largest volumetric flow rate he should allow (gal/min)? Firehose D1=8in d2=4in diameters.
On the right side of the truss there is 6,000 N worth of force going in the possitive x direction. Use the simplified method for trusses to calculate the external force vectors on each member.
On the right side of the truss there is 6,000 N worth of force going in the possitive x direction. Calculate the external loads on each member using the general mothod for sturctures.
The capped orifice on the side has a 4-cm diameter exit pipe that is located 3 m below the surface of the water. Ignore all friction effects, and determine the force necessary to keep the tank from
If the velocity out the 2-cm-diameter tube is 15 m/s, determine the rate at which the mass is changing inside the volume.
Design parameters for the containment vessels are as follows. Welded fabrication will be used. Assume that weld metal properties are the same as base metal properties.
Assume that you are responsible for the design of a wide-plate tension member built from a structural aluminum. Determine the propagation fatigue life for the design conditions.
The air flow is 0.5 kg/s in a 10 cm diameter pipe. Find the air inlet velocity, the water exit temperature, AND the total entropy generation.
Find the values of K that yield closed-loop poles with the damping ratio %u03BE = .707 d)Use Matlab to plot the response of the resulting design to a reference step.
To determine the viscosity of a liquid of density 948 kg/m^3, you fill, to a depth of 12 cm, a large container whichdrains through a 30-cm-long vertical tubeattached to the bottom.
Write down all equations necessary for this in a symbolic fashion. Finally substitute the values and find the heat transfer rate. please I need the answer with some explanation.
Why we do not heat refregerated streams with a stream at a temperature above ambient? For heat exchanger networks why we consider pinch method and exeegy related methods?
A cold storage room has walls made of 0.23 m of brick on the outside, 0.08 m of plastic foam find the rate of heat removal by refrigeration if the total wall area is 90 m^2.
Find the direction and magnitude of the work done this process? Find the direction and magnitude of the heat transfer during the process?
The average fuel to electric power efficiency of a coal fired power plant is about 37%. How much energy did these plants reject to the environment in 2001?
Specifications call for a composite part to be made of kevlar 49 fibers in a matrix of epoxy ( E=0.65 ). If the fiber volume fraction is 0.68, determine the maximum mudulus and minimum modulus.
The body is formed of slender rod and rotates about a fixed axis through point with the indicated angular properties. If and , determine the instantaneous velocity and acceleration of point.