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A structural steel with a fracture toughness of 60 MPa(m^1/2) has no surface crack larger than 3.5 mm in length. By how much (in %) would this largest surface crack have to grow before the system would experience fast fracture under an applied stress of 420 MPa?
Discuss the benefits and drawbacks of using certain materials or certain designs in an engineering or architectural project of your choice
Water vapor enters a valve with a mass flow rate of 1 kg/s at a temperature of 260°C and a pressure of 3.5 MPa, and undergoes a throttling process to 2.75 MPa. (T0 = 25°C, P0 = 100 kPa)
a secondary settling tank is to be designed for a municipal wastewater treatment facility. the influent tss is 1000 mgl
a heat engine receives 1 kw heat transfer at 1000 k and gives out 600 w as work with the rest as heat transfer to the
a flat plate is sliding at a constant velocity of 5 ms on a large horizontal table. a thin layer of oil of absolute
consider a front loader washer that weighs 200 lb with a 6 lb towels. the size of the drum is 0.4 m. during a spin
Refrigerant-134a is throttled from saturated liquid state at 7 bar to a pressure of 1.4 bar. Determine the temperature drop during this process and the final specific volume.
two meshing helical gears have a 25 degree transverse pressure angle and a 20 degree normal pressure angle. the gears
Determine the magnitude of the horizontal and vertical components of the force of the water on the gate.
a machine with a rotating shaft has a total weight of 90 kg and is supported by springs. the damping constant for the
a spring-mass system has a frequency of 2 hz. when the mass is decreased by 0.4 kg the frequency is changed by 25.
concrete has a density of 2400 kgm3 and a compressive strength of 30 mpa. what is the maximum height if a column if
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