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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?
six kilograms of co2 executes at carnot cycle in a piston-cylinder assembly. the minimum and maximum gas temperatures
steady-state creep rate data are given for an alloy taken at 474 k with the activation energy for creep of 140000
You are required to determine the decay curves for radioactive decay of a set of heavy isotopes. The isotope, 234U decays into 230Th with a half-life of 246000 years. The isotope, 230Th decays into 226Rn with a half-life of 75380 years. The isotope, ..
two resistors are given r1 470 ohms and r2 1200 ohms a the two resistors are connected in series with a 48 v source.
the refrigerator steadily receives a power input of 0.15 kw while rejecting energy by heat transfer to the surroundings
an air-conditioning system requires a 20-m long section of 15-cm diameter duct work to be laid underwater. determine
Determine the refrigeration load QL and The COP of the refrigerator - If the isentropic efficiency of compressor is 0.8 calculate the actual work of the compressor.
A 3L, 4-stroke, V6 engine with a 9.5:1 compression ratio delivers 205 N-m at 3600 RPM. At this speed, air enters the cylinder at 85 kPa and 60 C and combustion ends at 20 crank angle after top-dead-center. It is known that the engine is square and th..
air undergoes a polytropic process in a piston-cylinder assemply from p1 14.7 lbfin2 t1 70 degrees f to p2
in a crystallin material slip occurs preferentially along planes having higher planar densities. for a material with an
a helical spring of stiffness k is cut into two halves and a mass m is connected to the twonbsphalves as shown below
determine the minimum pump power required to pump water from one reservoir to another at an elevation of 110 m above
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