Find the error in the following proof that 2 = 1. consider the equation a = b. multiply both sides by a to obtain a 2 = ab. subtract b 2 from both sides to get a 2 − b 2 = ab − b 2 . now factor each side, (a + b)(a − b) = b(a − b), and divide each side by (a − b) to get a + b = b. finally, let a and b equal 1, which shows that 2 = 1.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

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

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)