Around, cold-drawn 1045 steel rod has a mean strength s¯¯y=95.5 kpsi with a standard deviation of σˆsy=6.59 kpsi . the rod is to be subjected to a mean static axial load of p¯¯¯=65 kip with a standard deviation of σˆp=5.0 kip . assuming the strength and load have normal distributions, determine the reliability corresponding to the design factor of 1.4. also, determine the diameter for this design factor.

If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Fluids at rest possess no flow energy. a)- true b)- false