for a rankine cycle, state 1 at the inlet of the turbine: a) is either saturated liquid or compressed liquid b) must be saturate vapor. c) is either saturated vapor or superheated. d) must be inside the vapor dome.
assume you have a simple beam 16 ft long supported on each end by r1 and r2. there is a concentrated load of 900 lb that is 4 ft from r2. reaction r1 is pinned 12 ft from the load. reaction r1 is 225 lb and r2 is 675 lb. what is the maximum bending moment in pounds per foot?
if the material is steel and the elastic modulus is 207 gpa and the poisson's ratio is 0.3 and the cross sectional area is 70 mm^2 and the original length is 58 mm. what is the change in length if a force of 1958 n is applied?
the open-ended polyvinyl chloride pipe has an inner diameter of 4 in. and thickness of 0.2 in. if it carries flowing water at 62 psi pressure, determine the state of stress in the walls of the pipe
an insulated rigid tank whose volume is 0.5 m^3, initially evacuated, is connected by a valve to a steam line carrying steam at 30 bar and 400c. the valve is opened and steam flows in to the tank until the tank pressure reaches 20 bar, at which point the valve is closed. determine the final temperature of the steam in the tank.
flow enters with a circular pipe with uniform velocity u. at the exit the velocity is either fully-developed laminar flow (parabolic) or turbulent 1/7 power law. for each case, what is the wall shear force?
Read the Gallup poll results of registered voters when asked this question. Thinking about how the gun issue might affect your vote for major offices, would you—only vote for a candidate who shares your views on gun control, would you consider a candidate's position on gun control as just one of many important factors when voting, or would you not consider gun control a major issue? Based on the data, what conclusion can be drawn about the importance of the Second Amendment over time? The number of voters who think the gun issues are important has decreased since 1999. The number of voters who think gun issues are the most important have stayed the same. More voters think gun issues are important or very important today compared to 2000. The number of voters who have no opinion on gun issues has increased dramatically.
in a rankine cycle with irreversibilities: a) turbine irreversibilies are larger (in magnitude) than the pump irreversibilities. b) has a lower thermal efficiency than an ideal rankine cycle. c) has a greater thermal efficiency than an ideal rankine cycle. d) isentropic efficiencies of turbine and compressor are both less than 1.
in size 0.008 mm has a yield strength of 160 mpa (23,500 psi). estimate the yield strength of this alloy after it has been heated to 60
Calculate the forces in all members of the trusses shown using either method of joints or method of sections. (10 points for FBDs)
When the grounded conductor is to be spliced in a 12-inch by 12-inch junction box, there shall be at least ? of free conductor left for splicing.
a step-down transformer is used for recharging the batteries of portable devices. the turns ratio n2/n1 for a particular transformer used in a cd player is 3:37. when used with 120-v (rms) household service, the transformer draws an rms current of 205 ma.(a) find the rms output voltage of the transformer. v(b) find the power delivered to the cd player.
the system shown in the image below consists of 1200 m of 5cm cast iron pipe, two 45o and four 90o flanged long-radius elbows, a fully open flanged globe valve, and a sharp exit into a reservoir. if the elevation at point 1 is 400 m, what is the gage pressure required at point 1 to deliver 0.005 m3/s of water at 20oc into the reservoir? 20 pts.
what is the magnitude of the maximum stress that exists at the tip of an surface crack having a radius of curvature of 0.030 mm and a crack length of 1.0 mm when a tensile stress of 125 mpa is applied? express you answer in mpa to the nearest whole number.
the strains determined by the use of the rosette attached as shown during the test of a machine element are p1 5 293.1 3 1026 in./in. p2 5 1385 3 1026 in./in. p3 5 1210 3 1026 in./in. determine (a) the orientation and magnitude of the principal strains in the plane of the rosette, (b) the maximum in-plane shearing strain.
in a rankine cycle, water/steam is usually superheated at the inlet of the turbine, because: a) better work/power output. b) better thermal efficiency. c) to lower the heat addition. d) to avoid or minimize the presence of liquid water at the exit of the turbine. e) to control the conditions at the exit of the condenser.
