Given a 3-bit input a, 1-bit input p, 1-bit input, a 6-bit adder, some 2-to-1 muxes, some not gates, and some xor gates: a: design a circuit that produces a 6-bit integer b such that b=3+a if p=0 and produces b=5-a if p=1. b: design a circuit that produces a 6-bit integer c such that c=3a if p=0 and produces c=5a+1 if p-1. c: design a circuit that outputs 6-bit integer d such that d=b if q=0 and d=c if q=1.

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

Apiping systems consists of 6 m of 6-std type k and 12 m of 4-std type k, both drawn copper tubing. the system conveys ethylene glycol at a rate of 0.013 m3/s. the pressure drop across the system is to be calculated. there are two 90° elbows in the 6-in pipe, a reduction from the 6-in pipe to the 4-in pipe and four 90° elbows in the 4-in pipe. all fittings are soldered (same as flanged) and regular. the inlet and outlet of the system are at the same height.

Tech a says never use a water hose to clean up dust after a repair. tech b says never use a floor scrubber to clean up dust after repairs. who is correct?