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You are asked to measure non-destructively the yield strength and tensile strength of an annealed 65-45-12 cast iron structural member. Fortunately, a small hardness indentation in this structural design will not impair its future usefulness, which is a working definition of non-destructive. A 10-mm-diameter tungsten carbide sphere creates a 4.26-mm-diameter impression under a 3000-kg load. What are the yield and tensile strengths?
a 50-kg iron block and a 20-kg copper block both initially at 80oc are dropped into a large lake at 15oc. thermal
starting from rest the motorboat travels around the circular pathp 50m at a speed v0.8tms where t is in seconds.
a cylinder - piston system contains 4 kilograms of liquid water liquid and vapor saturated at 35 c. a piston
starting from the general form of the heat equation in cylindrical coordinates for a system write an equation for the
A gas within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processes: There are no significant changes in kinetic or potential energy.
find the isentropic and the second law efficiencies for a turbine. it receives steam at 3000 kpa 500c and has two exit
An air-standard Diesel cycle has a compression ratio of 18.2. Air is at 27°C and 100 kpa at the beginning of the compression process and at 1700 K at the end of the heat-addition process.
a hypothetical a-b alloy of composition 59 wt b-41 wt a at some temperature is found to consist of mass fractions of
a 10 cm x 10cm sheet of material is 2 cm thick and made of a material with a conductivity of 0.5wmk?. one side of this
assume that blood is flowing through an aorta of 1cm diameter at an average velocity v of 50 cmsec. take alpha to be 12
a load of 500 pounds is placed on a cylinder of 1040 carbon steel with a 2 inch radius. calculate the stress in
a pistoncylinder contains water with quality 75 at 200 kpa. slow expansion is performed while there is heat transfer
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