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1. Air is expanded in a nozzle from a stagnation state of 2 MPa, 600 K, to a back pressure of 1.9 MPa. If the exit cross-sectional area is 0.003 m2, find the mass flow rate.
2. A 1-m3 insulated tank contains air at 1 MPa, 560 K. The air in the tank is now discharged through a small convergent nozzle to the atmosphere at 100 kPa. The nozzle has an exit area of 2 × 10-5 m2.
a. Find the initial mass flow rate out of the tank.
b. Find the mass flow rate when half of the mass has been discharged.
A rectangular plate 5ft by 4ft is at an angle of 30 degrees with the horizontal, and the 5-ft side is horizontal. Find the magnitude of the force on one side of the plate and the depth of its center of pressure when the top edge is (a) at the wate..
Design the temperature reinforcement, tie bars, and dowel bars for a highway concrete pavement with 13 inch slabs, f'c=3500 psi, traverse joints at 35 ft apar,t and with 3 12 ft lanes each way. Use grade 60 steel (k=200 pci). SF>=1.5
Determine the inclination θ of the ladder if the coefficient of static friction between the friction pad A and the ground is μs= 0.3. Assume the wall at B is smooth. The center of gravity for the man is at G.
Say the availability of supply is 60% to, and through Tank “A”, and 40% supplying tank B. Is this close to the transmission capacity within the system to J and C? If not, what do you suggest?
a= -10 (1/sec^2 ) x where x is the displacement of the mass in meters. If the initial position is -1 m and the initial velocity is +1 m/sec, find: (i) the velocity when x = 0 for the first time and (ii) the maximum and minimum values of x.
The acceleration of a particle is defined by the relation a= -0.7v where a is expressed in in/s2 and v in in/s. Knowing that t= o the velocity is 30in/s, determine 1.) the distance the particle will travel before coming to rest
The bottom of a rectangular flume is 5 m above reference level. The depth of the water in the flume is 3 m. The average velocity is 1.7 m/s. What is the total hydraulic energy at the surface of the water and at the bottom of the flume.
The velocity of the bed is limited to a maximum value of 150 mm/s to the right and 300 mm/s to the left; the acceleration is successively equal to 150 mm/s^2 to the right, zero 150 mm/s^2 to the left, zero, etc.
I want you to write 5-8 pages about (Work zone accidents in highways and roads in the U.S ), I want you to have 6-10 references, and want you to include (abstract, intro, background, issues & problems, solutions & recommendation, graphs & data)
a buried horizontal concrete pipe (n=0.012) of unknown length needs to be replaces. the length is not known because the original plans for the pipeline route have been lost. the pressure head drop along the segment that needs to be replaced is 29...
Plot ω vs t, marked by red stars. Label the x-axis, t,and the y-axis, ω. Give the plot a suitable title. Add a legend to the plot describingthe relationship between ω and t. Change the y-axis scale to show the plotfrom estimate ω is -100 to 1100.
A brass alloy has a yield strength of 280 MPa, a tensile strength of 390 MPa, and an elastic modulus of 105 GPa. A cylindrical specimen of this alloy 12.7 mm in diameter and 250 mm long is stressed in tension and found to elongate 7.6 mm.
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