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An 18-m-long steel wire of 5-mm diameter is to be used in the manufacture of a pre-stressed concrete beam. It is observed that the wire stretches 45 mm when a tensile force P is applied. Knowing that E= 200 GPa, determine (a) the magnitude of the force P, (b) the corresponding normal stress in the wire.
the heat flux through a 1-mm thick layer of skin is 1.05 x 104 wm2. the temperature at the inside surface is 37degc and
A vapor-compression heat pump system uses R-134a as the working fluid. The refrigerant enters the compressor at 0.24 Mpa, 0 degrees Celsius, with a volumetric flow rate of 0.6m^3/min. The compression process is adiabatic to 0.9 MPa, 60 degrees Cel..
air enters the compressor of a regenerative air-standard brayton cycle with a volumetric flow rate of 60 m3s at 0.8 bar
the cable from C to D prevents the plate and shaft from turning, and the weight of the assembly is carried by hearing A.
in an automotive gas turbine the centrifugal compressor is driven at 40000 rpm by an axial turbine. the compressor
consider an ideal vapor-compression air conditioner with a cooling capacity of q dotc 4 tons whose evaporator is used
a barometer is used to measure atmospheric pressure contains mercury with a density of 13590 kgm3. if the local
steam enters a compressor operating at steady state at 250 degrees farenheit 14.7 lbfin2 and exits at 400 degrees
1. a process water with a specific heat capacity of 4.182 k.1 kg-i k-1 flows at a rate of 0.050 kg s-i through a heat
consider a large classroom on a hot summer day with 150 students each dissapating 60w of sensible heat. all the lights
a slab milling operation is performed on the top surface of a steel rectangular workpiece 12.0 in long by 2.5 in wide.
a wind tunnel has a 1-m2 6-m-long test section in which air at standard sea-level conditions moves at 70 ms. it is
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