You are forward extruding a cylindrical copper billet (k=256 mpa, n=0.18; c = 155 mpa, m = 0.15) from a diameter of 0.5 m to a diameter of 0.18 m at a ram speed of 0.4 m/min. the billet is initially 1.5 m long. the extrusion process is performed at a temperature = 850°c. tmelting = 1082°c. the die is flat bottomed. determine the maximum extrusion force.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer

Describe one experiment in which the glass transition temperature and melting temperature of a totally amorphous thermoplastic material can be determined. show the relevant experimental results in a diagram which should be properly annotated with the two temperatures clearly marked. what is likely to happen to the curve in the diagram if the amorphous polymer is replaced by a thermosetting type?