Vehicles begin to arrive at a stadium parking lot’s entrance at 8: 50 a. m. with a constant arrival rate of 12 veh/ minute. at 9: 05 a. m., the arrival rate changed to 8 veh/minute. the parking lot opened at 9: 00 a. m. and let vehicles enter at a constant rate of 15 veh/minute. assume d/d/1 queuing. when did the queue dissipate? what was the maximum queue length? when did this happened? which vehicle had the maximum delay at the entrance, and how much?

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?

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