Consider the following C program: #include #include int main() { printf("%d\n", getppid()); while(1) {} } Suppose that we execute the program in the background with the command './a. out &'. This gives us the ability to run the ps command while the C program is executing. The following is displayed by the ps command: PID TTY STAT TIME COMMAND 9489 pts/0 Ss 0:00 -tcsh 10314 pts/0 R 0:14 ./a. out 10320 pts/0 R+ 0:00 ps a What is printed by the C program?

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.