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If w=1kn, determine the force for supporting memebers ac ab ad dg. Use method of joints at A. Solve for the forces in HL HK IL ML MK MP using method of sections.
A flat-plate collector 4m2 in area is tested during the night to measure the overall heat loss coefficient. Water at 60°C circulates through the collector at a flow rate of 0.06L/s.
Determine the concentration in weight percent of GaP that must be added to GaAs to yield a unit cell edge length of 0.5570 nm. The densities of GaAs and GaP are 5.316 and 4.130 g/cm3, respectively.
The evaporator operates at 200 kPa. Determine the system's COPHP and the rate of heat supplied to the evaporator when the compressor consumes 6 kW.
Determine: a. The rate of heat removal from the refrigerated space. b. The power input to the compressor. c. The rate of heat rejection to the environment. d. The COPR.
An ideal vapor-compression refrigeration cycle that uses refrigerant-134a as its working fluid maintains a condenser at 1000 kPa and the evaporator at 4oC.
Calculate the thermal efficiency of the cycle for compression ratios of a) 10:1 b) 12:1 c) 15:1 Compare with the appropriate Carnot efficiency. Assume constant specific heats.
How to convert the uneven diameter of the hollow tube in to a solid tube (same stresst) ( keep the length the same)? what equation to use? moment of Inertia?
The 2-lb box has a velocity of 5 ft/s when it begins to slide down the smooth inclined surface at A. The coordinates of point C are x = 17.66 ft, and y = 8.832 ft Determine the time to travel from
Determine the mass flow rate of hot water withdrawn from the tank during the shower and the average temperature of mixed water used for the shower.
Assume both will be worthless after 6 years and that the interest rate is %9.0. Determine by the equivalent uniform annual cost method which alternative is the better buy.
The NIST online database to get the enthalpy and density of water for the given conditions. a. Determine the mass flow rate of the water in kg/min. b. Determine the diameter of the pipeline.
If the efficiency of the longitudinal joint is 80% then calculate the working pressure assuming a safe working pressure of 50 N/mm2.
The sphere approaches the 25 degree incline of height 3 m, and rolls up the incline without slipping. a. Find the initial KE (translation and rotation). b. Find the velocity at the top of the inclin
Determine a.) the boundary work needed for this process and b.)the temperature after compression.(Use ideal gas equation; pressure given is absolute and R=0.1889 kJ/kg-K).
Determine the uncertainty of the velocity measured when the uncertainty of the manometer reading is +/- 2mm. R = 0.287 kPa*m^3 / kg*K water density = 1000 kg/m3
This 6" pipe has a sudden enlargement to an 8" (nominal pipe size) schedule 40 steel pipe and continues for another 200 ft with a submerged discharge. If the water is at 60 deg.F, what is the total
The volume of the mold cavity forming the outside surface of the casting = 5000 cm3. What is the weight of the final casting?
A piston-cylinder device contains 2.5 kg of air at 150 kpa and 2 m^3. the air is now compressed according to the relationship PV^2 = constant until it reaches 1 m^3. Determine the boundary work.
Assuming that the coefficient of kinetic friction the tires and road is 0.9and the coefficient of restitution of the impact is0.5, calculate the velocity of A just before impact.
Determine 1) the pressure and volume at the initial state. 2) the pressure and volume at the final state and 3) the total work.
Cutting conditions are: v = 2.5 m/s, f = 0.3 mm/rev, and d = 2.0 mm. Determine: (a) cutting time, and (b) metal removal rate.
Find the optimal compression ration in terms of the upper and lower temperature limits of operation. the optimal compression ratio should yield maximum specific works.
Calculate the entropy change in Btu/lbmR B. Calculate the heat transfer in Btu/lbm C. Sketch this process in a T-S diagram D. Is this process possible?
Combustion occurs with 20% excess air. Assume all fuel nitrogen is converted to NO2, and that no thermal NO2 forms. Calculate the NO2 concentration (ppm) in the exhaust gas.