De-emphasis is: decreasing the relative strength of low-frequency components of the output signal of an FM detector of an FM receiver. increasing the relative strength of high frequency components before being fed into the modulator of an FM transmitter. increasing the relative strength of low-frequency components before being fed into the modulator of an FM transmitter. decreasing the relative strength of high-frequency components of the output signal of an FM detector in an FM receiver.

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

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?

In general, how do thermosetting plastics compare to thermoplastics in mechanical and physical properties?