The _____ are joined by a 90-degree angle, and the _____ connects the span between their end-points.
a. travel and set; run
b. run and travel; set
c. set and run; travel
d. set and travel; run
c. set and run; travel
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Gas at constant T and P is contained in a supply line connected through a valve to a closed tank containing the same gas at a lower pressure. The valve is opened to allow flow of gas into the tank, and then is shut again.
(a) Develop a general equation relating 
and 
the moles (or mass) of gas in the tank at the beginning and end of the process, to the properties 
and 
the internal energy of the gas in the tank at the beginning and end of the process, and H?, the enthalpy of the gas in the supply line, and to Q, the heat transferred to the material in the tank during the process.
(b) Reduce the general equation to its simplest form for the special case of an ideal gas with constant heat capacities.
(c) Further reduce the equation of (b) for the case of 
= 0.
(d) Further reduce the equation of (c) for the case in which, in addition, Q = 0.
(e) Treating nitrogen as an ideal gas for which 
apply the appropriate equation to the case in which a steady supply of nitrogen at 25°C and 3 bar flows into an evacuated tank of 4 
volume, and calculate the moles of nitrogen that flow into the tank to equalize the pressures for two cases:
1. Assume that no heat flows from the gas to the tank or through the tank walls.
2. Assume that the tank weighs 400 kg, is perfectly insulated, has an initial temperature of 25°C, has a specific heat of 
and is heated by the gas so as always to be at the temperature of the gas in the tank.
Among the biggest trends for white collar workers at the start of the 21st century was
A. the continued outsourcing of financial service and engineering jobs to other countries. B. declining salary rates across the board. C. increased opportunities to relocate internationally. D. jobs requiring a higher level of education than in the past. E. work days that have inched up from eight to ten or even twelve hours a day.
Two technicians are discussing the DC coupling setting on a DSO. Technician A says that the position allows both the DC and AC signals of the waveform to be displayed. Technician B says that this setting allows just the DC part of the waveform to be displayed. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
In binary multiplication
A) the 2's complement of the multiplicand is added to the multiplier. B) the multiplicand is added to itself a number of times equal to the multiplier. C) 1's complements are substituted and then added for both the multiplier and the multiplicand. D) None of the above.