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A colleague in a foreign country reports that the Young's modulus of a certain layer has been back-calculated from the deformations of a stress increase due to a surcharge, from 20 kPa to 40 kPa. This modulus is given as E = 2000 kPa. A new surcharge is being planned, from 40 kPa to 60 kPa, and your colleague (who is not a geotechnical engineer) asks your advice on the value of E to be used then. What is your suggestion?
a push-rod for an internal combustion engine is 250.2 mm in length and is subjected to a force of 45 kn. if the
A starship in a binary system is located a distance R from one star and a distance 2R from the other star. The starship wants to launch a deep space probe of mass m. The probe has no propulsion system of its own. What is the escape velocity from the ..
An important application of micro fluidics is in the area of electro kinetic separations, in which an electric field is applied along the length of a micro channel to generate differential velocities for various components (molecules, nanoparticles, ..
A heat engine operates between a source at 530C and a sink at 8C. If heat is supplied to the heat engine at a steady rate of 1,450 kJ/min, determine the maximum power output of this heat engine.
the following activities and times were recorded for a mold operator removes molded piece from die 0.6 walks 10ft to a
A building has a calculated cooling load of 24 tons, of which 6 tons is latent load. The space is to be maintained at 72 F db and 50% relative humidity. 15% by volume of the air supplied to the space is outdoor air at 95 F db and 65% relative humidit..
the melting temperatures for various materials are listed in the inside cover of callister. some representative values
an adiabatic compressor compresses air from atmospheric pressure and 70 degf at a rate of 10000 acfm actual cubic feet
The train should reach a full load speed of 100 Km per hour. The efficiency of the motor must be between 85 to 90 percent. The motor shaft diameter range is (0.6 to 0.8 m) Choose and estimate all the design characteristics of the motor finally dis..
The cylinder of a turbocharged diesel engine is filled with air at 30.0 psia and 250°F. When the intake valve closes, cylinder volume is 60.0 in3. The piston moves upward un-til cylinder volume is 4.00 in3, at which time pressure is 1100 psia. What ..
a device with no moving parts provides a steady stream of chilled air at -25c and 1 bar. the feed to the device is
steam having a specific enthalpy of 160 kjkg and pressure of 1 kpa enters an adiabatic pump. upon leaving the pump the
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