Implement the 4-bit Ripple Carry Adder (RCA) for unsinged integers using the 1bFA from problem 1 as building blocks. The adder has 9 inputs A(3:0), B(3:0), C0 and 5 outputs S(3:0), C4. a) Show the schematic. b) Estimate the circuit propagation delays for • Carry-in C0 to Carry-out C4, • Data-to-Carry-out C4.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater