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Determine: a. The temperature of the air at the compressor exit. b. The heat transfer in kJ/kg of air flowing c. sketch the process on a p-v and T-s diagrams and indicate the work and heat transfers
The water is expanded isothermally until the quality is 80%. Determine the work produced by the expansion. Do not assume water to behave as an ideal gas. ( W is not equal to RT(ln(v2/v1))
Then in another 4 s it moves from sB to sC = +2.5m. Determine the particle's average velocity and average speed during the 6-s time interval.
If the mean thickness is 3mm and the standard deviation is 0.25, calculate the percentage of gaskets that have a thickness greater than 2.5mm.
Saturated vapor at 150 kpa. It is heated to 40 C, and the steel is at the same temperature as the R-134a at any time. Find the work and heat transfer for the process.
Compute the required diameter of the wire. Neglect the weight of the wire. Use E = 207 000 MPa and a proportional limit of 234 MPa.
Compute the maximum tensile stress due to the bar's own weight and the maximum load P (the allowable load) that can be safeley supported at the lower end of the bar if the allowable tensile stress is
Calculate the period and the frequency of rotation for the object. Calculate the centripetal force required to rotate a 3kg mass in a 6m diameter circle at one 60 revolutions per minute.
Assuming the heat transfer to be at steady state, what thickness of insulation should be put on the duct to keep the rate of heat gain by the refrigerated air per meter length of the duct to 30 W?
Consider air parcel moving upwards. a) What will be the air parcel's temperature be at 2 km altitude, if the surface temperature of the air parcel is 25°C? b) What will be the parcel's temperat
What is the relative humidity (RH) of an air parcel with temperature 25°C and absolute humidity 8 g/m3? See class 4 notes posted to Blackboard for saturation pressure equation.
Assume that the actual density of the washers is 7.81 g/cm3. What is the percent error of your calculated mean? What sources of error exist in this experiment?
Determine the steady state rate of heat transfer per unit area through a 4.0 cm thick homogeneous slab with its two faces maintained at uniform temperature of 38 degrees C and 21 degrees C.
Calculate the time until it reaches 400C. what is the pressure then? Draw the process on a Pv and Tv diagram with respect to the saturation line.
Determine the diffusion time required at 600oC. The pre-exponential and activation energy for diffusion of nitrogen in steel is given as 3X10-7m2/s and 76.15 kJ/mol, respectively.
A hollow shaft has an outsaid diameter of 35 mm and an insaid diameter of 25 mm complute the torsional shear stress in the shaft when it is subjected to a torque of 560 N.m.
There are straight rectangular fins on the right hand side of the wallwith thermal conductivity 250 W/mK. What is the max temp that will occur in the wall?
Draw a schematic of the system , determine the exergy destruction rate (kW). Is there any practical way to reduce the exergy destruction for this process?
If the furnace is at 1200 °C and the surrounding room is at 30 °C, determine the rate of exergy destruction (kW) through the window?
Determine (a) the actual work (kJ) and (b) the minimum work (kJ) of the process. (c) Draw one T-s diagram of the two processes.
Compute the estimated endurance strength for a 20.0mm-diameter rod machined from AISI 5160 OQT 1300 steel and subjected to reversed and repeated bending stress. use reliability of 99%.
Compute the required diameter for a solid circular shaft if it is transmitting a maximum of 110hp at a speed of 560 rpm. the torque varies from zero to the maximum.
The valve is opened, and the two tanks eventually come to a uniform state. Assuming the process to be adiabatic, what is the final pressure?
Compute the stress in the bar and the resulting design factor if it is made from (a) AISI 120 hot-rolled steel (b) AISI 8650 OQT 1000 steel, (c) ductile iron A536-84 (60-40-18).
A tool with a weight of 500lb moves continuously from the end of the 60in beam to a point 10in from the support. Specify a suitable design for the boom, giving the material, the cross-sectional shap