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Repeat Prob. 17-146 for helium.
Prob. 17-146
Air is heated as it flows sub sonically through a 10 cm 10 cm square duct. The properties of air at the inlet are maintained at Ma1 =0.4, P1 =400 kPa, and T1 =360 K at all times. Disregarding frictional losses, determine the highest rate of heat transfer to the air in the duct without affecting the inlet conditions.
The wood specimen is to be loaded in a testing machine until it fails in tension. The ultimate normal strength of the wood is ?ult = 1800 psi and the ultimate shear strength of the wood is ult = 800 psi.
The temperature was 200C, and the void ratio (e) of the soil was 0.43. Calculate the "Coefficient of Permeability" in "centimeters per second" (Given, k = (QL)÷(A Δh t)).
A 60 -m- long steel wire must not strech more than 48mm when the tension in the wire is 6 kn. Knowing that e-200GPa, determine (a)the smallestdiameter which may selected for the wire,(b)the corresponding value of the normal stress.
Generate an Excel Spreadsheet with a detailed concrete takeoff of the Hunter Nissan Project. Include a worksheet for the continuous footing for the exterior portions of the building;
determine the elastic elongation that would be expected for a 16-mm-diameter rod of the same material if the rod were 1.6 m long and subjected to a tension force of 3.3 kN.
A torque of magnitude T = 1000Nm is applied at D as shown. Knowing that the diameter of shaft AB is 56 mm and that the diameter of shaft CD is 42 mm, determine the maximum shearing stress in (a) shaft AB, (b) shaft CD.
determine critical depth in a circular pipe of 36 inches diameter and roughness coefficient of 0.015. The flow rate is 15 cfs. So = 0.002
For unidirectional carbon/epoxy tape at a 60% fiber volume fraction, calculate E11 and E22. Given Ef= 211 GPa and Em =10 GPa. Calculate the fiber weight fraction. Given pf=1.95 g/cm3 and pm =1.3 g/cm3.
If the stage of a stream increases by 40% and the slope of the water surface becomes half of its original slope, then what will be changes in discharge of the stream?
A 1.0 × 106 gallon reactor is used in a sewage-treatment plant. The influent biochemical oxygen demand (BOD) concentration is 100 mg/L, the effluent BOD concentration is 25 mg/L, and the flow rate through the reactor is 500 gal/min.
Design a bridge that will withstand 4 fully loaded semi-trailers (eg 2 going in each direction) at the central point, being aware of both static and dynamic loads, the span of the bridge will be 200 meters in length; width is whatever you determin..
Determine the required size of new Schedule 40 steel pipe to carry 0.5 cfs (Q = 0.5 cfs) of water at 160o F with a maximum pressure drop of 10 psi per 1,000 ft.
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