Consider the following model of the is curve without an international sector: consumption: latex: \frac{c_t}{\bar{y}_t} = \bar{a}_c - \bar{b}_c (r_t - \bar{r}) c t y ¯ t = a ¯ c − b ¯ c ( r t − r ¯ ); investment: latex: \frac{i_t}{\bar{y}_t} = \bar{a}_i - \bar{b}_i (r_t - \bar{r})i t y ¯ t = a ¯ i − b ¯ i ( r t − r ¯ ); and government expenditure: latex: g_t = \bar{a}_g \bar{y}_tg t = a ¯ g y ¯ t. note that latex: \bar{b}_cb ¯ c can be a positive or negative real number. with this formulation, the is curve is: group of answer choices

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?

Heat transfer by is the fastest mode of heat transfer that requires no intervening medium. a)-conduction b)-convection c)-radiation d)-conduction and convection

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.