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A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former.
It is also subjected to a shear stress of 400 MPa on the same planes. The maximum normal stress will be
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.
heat is to be conducted along a circuit board that has a copper layer on one side. the circuit board is 15 cm long and
A company expects to realize a revenue of RM100,000 during the first year starting now from the sale of a new product. Sales are expected to decrease gradually with uniform gradient due to competition to a level of RM 47,500 on the eighth year fro..
Air is heated in an adiabatic piston cylinder device at a constant pressure of 100 kPa. The initial specific volume of air is 1 m3/kg. If the volume of the cylinder is increased by 50% in this process, determine the specific entropy change of air in ..
a 0.12-ounce bullet hits at 2000 fts a suspended 10-lb block of wood and becomed embedded in it. the angle alpha
steam is contained in a rigid container at an initial pressure of 100 psia and 600 f. the pressure is reduced to 10
a system has an initial volume of 10 ft3 and expands to a final volume of 20 ft3. the initial pressure is 15 psia. find
consider the combustion of butane c4h10 in the gas phase with the theoretical amount of air. the products and reactants
steam flows steadily into a turbine at 2 mpa and 400 deg c at a flow rate of 25 kgs. if the turbine is adiabatic and
A voltage signal is produced by a transducer. The signal contains its strongest frequency component at 50 Hz (amplitude = 5.0 V), plus a weaker component at the second harmonic (100 Hz) with amplitude 2.0 V. In addition, there is noise at 60 Hz with..
a 25-cm diameter rod is suspended horizontally in quiescent still air that is at 50degc. the rod is 250 cm long and is
Due to oxidation at very high tempera- ture, the wire emissivity is s = 0.80 when it burns out. The water vapor properties at the film temperature of 1209 K are pv = 0.189 kg/m3, cp,v = 2404 J/kg · K, vv = 231 X 10-6 m2/s, kv = 0.113 W/m · K.
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