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A smooth wire has the form of the helix x = a cos θ, y = a sin θ, z = bθ, where θ is a real parameter, and a, b are positive constants. The wire is fixed with the axis Oz pointing vertically upwards.
A particle P, which can slide freely on the wire, is released from rest at the point (a, 0, 2πb). Find the speed of P when it reaches the point (a, 0, 0) and the time taken for it to do so.
saturated liquid r-134a at 50 psia enters an adiabatic throttling value at a rate of 0.2-lbms. the outlet pressure is
A cylindrical pressure vessel has an internal pressure of 500 kPa, 6-mm wall thickness, and an outside diameter of 1.4 m. What is the absolute largest shear stress in the wall of the vessel? What is the largest normal stress?
Using centerline dimensions, calculate the maximum shear stress σmax in the web of the beam.
consider 5 kg of air initially at 101.3 kpa and 38 c. heat is transferred to the air until the temperature reaches 260
At this higher rotational speed, how much does the wheel move during the current on-time, and might this have the effect f elongating the weld nugget (making it elliptical rather than round)?
A 6-ft-long cantilever beam is subjected to a concentrated load of 5 kips acting at its free end. Calculate the maximum deflection at the free end if the beam is a solid rectangular Douglas fir (S4S), 8- in.-by-12-in. beam;
determine the quality of a saturated liquid vapor mixture given the data below. mvapor 9 kg mliquid 11 kgnbsp
Investigate the effect of flow direction on the heat rate (W/m) for (a) horizontal, (b) downward, and (c) upward flow.
What general conclusions can you draw?
refrigerant 134a is the working fluid in an organic rankine cycle. saturated vapor at 60degc enters the turbine and the
the city of houston has a water filtration system that consists of a large rigid tank with a single 1.5m diameter inlet
Consider a two- dimensional, straight triangular fin of Length L= 50mm and base thickness t= 20mm. The thermal conductivity of the fin is k= 25 W/mK. The base temperature is T_b= 50 degrees Celsius, and the fin is exposed to convection conditions cha..
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