Change shellcode. c as follows. what offset from the address of variable ret should be used here? in your report, explain how you use the assembly code to find out the layout of the variables in the program stack. assembly code can be obtained by using gdb disas command or gcc –s flag. also draw the program stack to analyze why the offset works. show the value of $esp and $ebp and the return address of main. compare the contents of the return address of main when entering and exiting main. print the address of variable shellcode and compare it with the contents of the return address of main.

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Find the minimum film thickness for a journal bearing with the data below. shaft diameter, d-50 mm, clearance ratio, cdratio? 0.001, shaft speed, n 2000 rpm; bearing length. i 200 mm; eccentricity ration, ? -0.55. ( note, cdratio-ca/d) the minimum film thickness is um

What is the main objective of using reheat rankine cycle?