Asseen in the previous problem, strace is a very nice tool to investigate what’s going on under the hood. But now, you began to wonder how in the world this strace program is actually implemented in Linux. Specifically, you want to know what OS ‘trick' or 'interface' allows the strace program to monitor another program.

Devise a scheme to quickly identify this OS 'trick' that makes strace possible.

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.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

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