3. The ladder for this treehouse has been removed because the wood was rotting. You need to design a
new way to get into the treehouse. Which questions
would help define this engineering problem more
precisely? Choose all that apply.
Al How much do the users of the treehouse weigh?
B. What materials and tools can I use?
C. Is the rope on the tire swing strong enough to be
safe if two people are on the tire?
D. Is there a way to close the window for privacy?

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