How does each of the following influence the tensile modulus of a semicrystalline polymer? (a) molecular weight decrease (b) degree of crystallinity increase (c) deformation by drawing (d) annealing of an undeformed material (e) annealing of a drawn material a. (a) - non-direct influence, (b) - increase, (c) - decrease, (d) - increase, (e) - decrease b. (a) - non-direct influence, (b) - increase, (c) - decrease, (d) - decrease, (e) - decrease c. (a) - increase, (b) - decrease,(c) - decrease, (d) - increase, (e) - decrease d. (a) - non-direct influence, (b) - increase, (c) - increase, (d) - increase, (e) - decrease

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan