Assume that a particular temperature probe approximates first-order behavior in a particular application, it has a time constant of 6s, and it is suddenly subjected to a temperature step from an unknown starting point to 400°F. If the termperature indicated after 20 seconds is 387°F, then what was the temperature at the starting point?

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

What is the major difference between thermoplastics and thermosetting plastics from the polymerization structure point of view?

Define thermoplastic polymers and thermosetting polymers in terms of their structures, and (ii) describe briefly a process suitable for the production of products from each type of polymer.