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When the temperature is at 30oC, the A-36 steel pipe fits snugly between the two fuel tanks. When fuel flows through the pipe, the temperatures at ends A and B rise to 130oC and 80oC, respectively. If the temperature drop along the pipe is linear, determine the average normal stress developed in the pipe. Assume each tank provides a rigid support at A and B.
It has been argued that the growth of internal voids in a material while it is being deformed is given by dr= f (σ H)dε, where r is the radius of the void and f (σ H) is a function of the hydrostatic stress. Explain, using this hypothesis,
a lecture hall having a volume of 106 ft3 contains air at 808f 1 atm and a humidity ratio of 0.01 lb of water vapor per
An automotive radiator cools glycerine from 95 degrees C to 55 degrees C, Air flows through it, entering at 20 degrees C and leaving at 25 degrees C. If the radiator is designed to reject 25kW determine the mass flow rate of the glycerine
a sphere of naphthalene having a radius of 2mm is suspended in a large volume of shell air at 318 k and 1 atm. the
1. approximately 130000 tons 118 106 kg of coal are burned each year at the iowa state university power plant. the coal
an air-standard otto cycle has a compression ratio of 8 and the temperature and pressure at the beginning of the
A duralumin tie bar of diameter 40 mm and length 600 mm carries a tensile load of 180 kN. If the bar contains a 30 mm diameter hole along 100 mm of its length, determine the stress in the two sections and the overall change in length.
the accerleration of a particle is defined by the relation a a - 6t2 where a is constant. at t 0 the particle starts
determine the maximum theoretical speed that may be achieved over a distance of 360ft by a car of weight w starting
In the physical aliasing demonstration, the small DC electric motor rotated the wheel at 1500 RPM. What would be the Nyquist frequency in RPM for the rotation of the wheel?
heat is generated in a 1.4-m-long 0.2-cm-diameter electrical wire that extends across a room which is maintained at
An air compressor takes air from outdoors at 28deg C and 101.2kPa and compresses it to 790kPa and 50 deg C. The air input to the compressor is found to be 22.67m3/hr. Estimate the required Hp to operate the compressor.
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