Amass is connected by means of a spring to an elastic support. the static deflection due to the weirhs of this mass is so mm. the support is oscillated with simple hamonic motion at 2.0 hz and amplitude 10 ms. determine the amplitude of vibration of the mass if the damping is net nie. the mass is now damped in oil bath which cyerts a yesistance proportional to velocity, and the spring anchorage 13 oscillated as before. it is observed that the amplitude of vibration of the mass is now cne-fifth of its previous value. find the damping ratio, the phase angle and the relative amplitude between mass and support.

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj