The ____ commands of AutoCAD are excellent for connecting two partial sections.
A. FILLET, EXTEND, and PROPERTIES
B. ARRAY, FILLET, and STRETCH
C. FILLET, EXTEND, and COPY
D. FILLET, EXTEND, and STRETCH
Answer: D
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A) What is the molar enthalpy of saturated liquid at P=1 bar? B) What is the temperature of the 0.8 mol/sec of low-pressure vapor when it leaves the heat exchanger that is described in step 4? C) One of the compressors (step 5) takes in 1 mol/sec of vapor at P=3 bar and T=250 K, and emits it at P=10 bar and T=350 K. (These are the actual conditions in and out of the actual compressor.) What is the rate at which work is added to this compressor? D) One of the heat exchangers takes in 1 mol/sec of gas at P=3 bar and T=330 K, and emits it at P=3 bar and T=250 K. How much heat is removed in this heat exchanger?
1. A compound is very volatile and can only be liquefied at extremely low temperatures. At pressures of 3 bar and below, it can be modeled as an ideal gas with a constant Cp*=13R. The following list contains some additional data regarding the compound:
Boiling temperature at 1 bar = 125 K
Molar enthalpy of saturated vapor at 1 bar: HV = 100 kJ/mol
Critical Pressure = 8 bar
Molar enthalpy of supercritical fluid at P=10 bar and various temperatures:
A steady-state Linde Liquefaction process for this compound works as follows:
1. One mole per second of supercritical fluid at P=10 bar and T=250 K enters a counter-current heat exchanger, where its temperature is lowered to 150 K.
2. The supercritical fluid leaving step 1 enters a flash chamber where it undergoes an adiabatic (Joule-Thompson) expansion to P=1 bar, and 20% of it liquefies.
3. The 0.2 mol/sec of saturated liquid at P=1 bar is removed as product.
4. The 0.8 mol/sec of saturated vapor at P=1 bar is returned to the heat exchanger of step 1, where it acts as the coolant for the entering supercritical fluid.
5. The vapor from step 4 is mixed with 0.2 mol/sec of fresh feed, and the mixed stream enters a series of compressors and heat exchangers which return the stream to 10 bar and 250 K.
The specification for the pull strength of a wire that connects an integrated circuit to its frame is 10 g or more. In a sample of 85 units made with gold wire, 68 met thespecification, and in a sample of 120 units made with aluminum wire, 105 met the specification. Find a 95% confidence interval for the difference in the proportions of units that meet the specification between units with gold wire and those with aluminum wire.
What will be an ideal response?
The fastest growing category of pets today in the United States is:
A. Reptiles B. Fish C. Birds D. Rodents
Plywood, the original engineered building material, is made from thin layers of ____ that are glued together.
A. pine B. wood chips C. wood veneer D. wood scraps